State-of-the-art methods in materials science such as artificial intelligence and data-driven techniques advance the investigation of photovoltaic materials.
author: - first_name: Hossein full_name: Mirhosseini, Hossein last_name: Mirhosseini - first_name: Ramya full_name: Kormath Madam Raghupathy, Ramya last_name: Kormath Madam Raghupathy - first_name: Sudhir K. full_name: Sahoo, Sudhir K. last_name: Sahoo - first_name: Hendrik full_name: Wiebeler, Hendrik last_name: Wiebeler - first_name: Manjusha full_name: Chugh, Manjusha last_name: Chugh - first_name: Thomas D. full_name: Kühne, Thomas D. last_name: Kühne citation: ama: Mirhosseini H, Kormath Madam Raghupathy R, Sahoo SK, Wiebeler H, Chugh M, Kühne TD. In silico investigation of Cu(In,Ga)Se2-based solar cells. Physical Chemistry Chemical Physics. 2020;22(46):26682-26701. doi:10.1039/d0cp04712k apa: Mirhosseini, H., Kormath Madam Raghupathy, R., Sahoo, S. K., Wiebeler, H., Chugh, M., & Kühne, T. D. (2020). In silico investigation of Cu(In,Ga)Se2-based solar cells. Physical Chemistry Chemical Physics, 22(46), 26682–26701. https://doi.org/10.1039/d0cp04712k bibtex: '@article{Mirhosseini_Kormath Madam Raghupathy_Sahoo_Wiebeler_Chugh_Kühne_2020, title={In silico investigation of Cu(In,Ga)Se2-based solar cells}, volume={22}, DOI={10.1039/d0cp04712k}, number={46}, journal={Physical Chemistry Chemical Physics}, publisher={Royal Society of Chemistry (RSC)}, author={Mirhosseini, Hossein and Kormath Madam Raghupathy, Ramya and Sahoo, Sudhir K. and Wiebeler, Hendrik and Chugh, Manjusha and Kühne, Thomas D.}, year={2020}, pages={26682–26701} }' chicago: 'Mirhosseini, Hossein, Ramya Kormath Madam Raghupathy, Sudhir K. Sahoo, Hendrik Wiebeler, Manjusha Chugh, and Thomas D. Kühne. “In Silico Investigation of Cu(In,Ga)Se2-Based Solar Cells.” Physical Chemistry Chemical Physics 22, no. 46 (2020): 26682–701. https://doi.org/10.1039/d0cp04712k.' ieee: 'H. Mirhosseini, R. Kormath Madam Raghupathy, S. K. Sahoo, H. Wiebeler, M. Chugh, and T. D. Kühne, “In silico investigation of Cu(In,Ga)Se2-based solar cells,” Physical Chemistry Chemical Physics, vol. 22, no. 46, pp. 26682–26701, 2020, doi: 10.1039/d0cp04712k.' mla: Mirhosseini, Hossein, et al. “In Silico Investigation of Cu(In,Ga)Se2-Based Solar Cells.” Physical Chemistry Chemical Physics, vol. 22, no. 46, Royal Society of Chemistry (RSC), 2020, pp. 26682–701, doi:10.1039/d0cp04712k. short: H. Mirhosseini, R. Kormath Madam Raghupathy, S.K. Sahoo, H. Wiebeler, M. Chugh, T.D. Kühne, Physical Chemistry Chemical Physics 22 (2020) 26682–26701. date_created: 2022-06-28T08:02:39Z date_updated: 2022-06-28T08:03:05Z department: - _id: '27' doi: 10.1039/d0cp04712k intvolume: ' 22' issue: '46' keyword: - Physical and Theoretical Chemistry - General Physics and Astronomy language: - iso: eng page: 26682-26701 project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Physical Chemistry Chemical Physics publication_identifier: issn: - 1463-9076 - 1463-9084 publication_status: published publisher: Royal Society of Chemistry (RSC) status: public title: In silico investigation of Cu(In,Ga)Se2-based solar cells type: journal_article user_id: '15278' volume: 22 year: '2020' ... --- _id: '32242' abstract: - lang: eng text: "We consider a resource-aware variant of the classical multi-armed bandit\r\nproblem: In each round, the learner selects an arm and determines a resource\r\nlimit. It then observes a corresponding (random) reward, provided the (random)\r\namount of consumed resources remains below the limit. Otherwise, the\r\nobservation is censored, i.e., no reward is obtained. For this problem setting,\r\nwe introduce a measure of regret, which incorporates the actual amount of\r\nallocated resources of each learning round as well as the optimality of\r\nrealizable rewards. Thus, to minimize regret, the learner needs to set a\r\nresource limit and choose an arm in such a way that the chance to realize a\r\nhigh reward within the predefined resource limit is high, while the resource\r\nlimit itself should be kept as low as possible. We derive the theoretical lower\r\nbound on the cumulative regret and propose a learning algorithm having a regret\r\nupper bound that matches the lower bound. In a simulation study, we show that\r\nour learning algorithm outperforms straightforward extensions of standard\r\nmulti-armed bandit algorithms." author: - first_name: Viktor full_name: Bengs, Viktor last_name: Bengs - first_name: Eyke full_name: Hüllermeier, Eyke last_name: Hüllermeier citation: ama: Bengs V, Hüllermeier E. Multi-Armed Bandits with Censored Consumption of Resources. arXiv:201100813. Published online 2020. apa: Bengs, V., & Hüllermeier, E. (2020). Multi-Armed Bandits with Censored Consumption of Resources. In arXiv:2011.00813. bibtex: '@article{Bengs_Hüllermeier_2020, title={Multi-Armed Bandits with Censored Consumption of Resources}, journal={arXiv:2011.00813}, author={Bengs, Viktor and Hüllermeier, Eyke}, year={2020} }' chicago: Bengs, Viktor, and Eyke Hüllermeier. “Multi-Armed Bandits with Censored Consumption of Resources.” ArXiv:2011.00813, 2020. ieee: V. Bengs and E. Hüllermeier, “Multi-Armed Bandits with Censored Consumption of Resources,” arXiv:2011.00813. 2020. mla: Bengs, Viktor, and Eyke Hüllermeier. “Multi-Armed Bandits with Censored Consumption of Resources.” ArXiv:2011.00813, 2020. short: V. Bengs, E. Hüllermeier, ArXiv:2011.00813 (2020). date_created: 2022-06-28T07:26:54Z date_updated: 2022-06-28T07:27:19Z department: - _id: '27' external_id: arxiv: - '2011.00813' language: - iso: eng project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: arXiv:2011.00813 status: public title: Multi-Armed Bandits with Censored Consumption of Resources type: preprint user_id: '15278' year: '2020' ... --- _id: '19844' abstract: - lang: eng text: The defect-electronic properties of {112} microfaceted surfaces of epitaxially grown CuInSe2 thin films are investigated by scanning tunneling spectroscopy and photoelectron spectroscopy techniques after various surface treatments. The intrinsic CuInSe2 surface is found to be largely passivated in terms of electronic defect levels in the band-gap region. However, surface oxidation leads to an overall high density of defect levels in conjunction with a considerable net surface dipole, which persists even after oxide removal. Yet, a subsequent annealing under vacuum restores the initial condition. Such oxidation/reduction cycles are reversible for many times providing robust control of the surface and interface properties in these materials. Based on ab initio simulations, a mechanism where oxygen dissociatively adsorbs and subsequently diffuses to a subsurface site is proposed as the initial step of the observed dipole formation. Our results emphasize the relevance of oxidation-induced dipole effects at the thin film surface and provide a comprehensive understanding toward passivation strategies of these surfaces. author: - first_name: Amala full_name: Elizabeth, Amala last_name: Elizabeth - first_name: Sudhir K. full_name: Sahoo, Sudhir K. last_name: Sahoo - first_name: David full_name: Lockhorn, David last_name: Lockhorn - first_name: Alexander full_name: Timmer, Alexander last_name: Timmer - first_name: Nabi full_name: Aghdassi, Nabi last_name: Aghdassi - first_name: Helmut full_name: Zacharias, Helmut last_name: Zacharias - first_name: Thomas full_name: Kühne, Thomas id: '49079' last_name: Kühne - first_name: Susanne full_name: Siebentritt, Susanne last_name: Siebentritt - first_name: Hossein full_name: Mirhosseini, Hossein id: '71051' last_name: Mirhosseini orcid: https://orcid.org/0000-0001-6179-1545 - first_name: Harry full_name: Mönig, Harry last_name: Mönig citation: ama: Elizabeth A, Sahoo SK, Lockhorn D, et al. Oxidation/reduction cycles and their reversible effect on the dipole formation at CuInSe2 surfaces. Phys Rev Materials. 2020;4:063401. doi:10.1103/PhysRevMaterials.4.063401 apa: Elizabeth, A., Sahoo, S. K., Lockhorn, D., Timmer, A., Aghdassi, N., Zacharias, H., Kühne, T., Siebentritt, S., Mirhosseini, H., & Mönig, H. (2020). Oxidation/reduction cycles and their reversible effect on the dipole formation at CuInSe2 surfaces. Phys. Rev. Materials, 4, 063401. https://doi.org/10.1103/PhysRevMaterials.4.063401 bibtex: '@article{Elizabeth_Sahoo_Lockhorn_Timmer_Aghdassi_Zacharias_Kühne_Siebentritt_Mirhosseini_Mönig_2020, title={ Oxidation/reduction cycles and their reversible effect on the dipole formation at CuInSe2 surfaces}, volume={4}, DOI={10.1103/PhysRevMaterials.4.063401}, journal={Phys. Rev. Materials}, publisher={American Physical Society}, author={Elizabeth, Amala and Sahoo, Sudhir K. and Lockhorn, David and Timmer, Alexander and Aghdassi, Nabi and Zacharias, Helmut and Kühne, Thomas and Siebentritt, Susanne and Mirhosseini, Hossein and Mönig, Harry}, year={2020}, pages={063401} }' chicago: 'Elizabeth, Amala, Sudhir K. Sahoo, David Lockhorn, Alexander Timmer, Nabi Aghdassi, Helmut Zacharias, Thomas Kühne, Susanne Siebentritt, Hossein Mirhosseini, and Harry Mönig. “ Oxidation/Reduction Cycles and Their Reversible Effect on the Dipole Formation at CuInSe2 Surfaces.” Phys. Rev. Materials 4 (2020): 063401. https://doi.org/10.1103/PhysRevMaterials.4.063401.' ieee: 'A. Elizabeth et al., “ Oxidation/reduction cycles and their reversible effect on the dipole formation at CuInSe2 surfaces,” Phys. Rev. Materials, vol. 4, p. 063401, 2020, doi: 10.1103/PhysRevMaterials.4.063401.' mla: Elizabeth, Amala, et al. “ Oxidation/Reduction Cycles and Their Reversible Effect on the Dipole Formation at CuInSe2 Surfaces.” Phys. Rev. Materials, vol. 4, American Physical Society, 2020, p. 063401, doi:10.1103/PhysRevMaterials.4.063401. short: A. Elizabeth, S.K. Sahoo, D. Lockhorn, A. Timmer, N. Aghdassi, H. Zacharias, T. Kühne, S. Siebentritt, H. Mirhosseini, H. Mönig, Phys. Rev. Materials 4 (2020) 063401. date_created: 2020-10-02T09:16:41Z date_updated: 2022-07-21T09:32:16Z department: - _id: '304' doi: 10.1103/PhysRevMaterials.4.063401 intvolume: ' 4' language: - iso: eng page: '063401' project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Phys. Rev. Materials publisher: American Physical Society status: public title: ' Oxidation/reduction cycles and their reversible effect on the dipole formation at CuInSe2 surfaces' type: journal_article user_id: '71051' volume: 4 year: '2020' ... --- _id: '21112' abstract: - lang: eng text: Photovoltaics is one of the most promising and fastest-growing renewable energy technologies. Although the price-performance ratio of solar cells has improved significantly over recent years{,} further systematic investigations are needed to achieve higher performance and lower cost for future solar cells. In conjunction with experiments{,} computer simulations are powerful tools to investigate the thermodynamics and kinetics of solar cells. Over the last few years{,} we have developed and employed advanced computational techniques to gain a better understanding of solar cells based on copper indium gallium selenide (Cu(In{,}Ga)Se2). Furthermore{,} we have utilized state-of-the-art data-driven science and machine learning for the development of photovoltaic materials. In this Perspective{,} we review our results along with a survey of the field. author: - first_name: S. Hossein full_name: Mirhosseini, S. Hossein id: '71051' last_name: Mirhosseini orcid: 0000-0001-6179-1545 - first_name: Ramya full_name: Kormath Madam Raghupathy, Ramya id: '71692' last_name: Kormath Madam Raghupathy orcid: https://orcid.org/0000-0003-4667-9744 - first_name: Sudhir K. full_name: Sahoo, Sudhir K. last_name: Sahoo - first_name: Hendrik full_name: Wiebeler, Hendrik last_name: Wiebeler - first_name: Manjusha full_name: Chugh, Manjusha id: '71511' last_name: Chugh - first_name: Thomas full_name: Kühne, Thomas id: '49079' last_name: Kühne citation: ama: Mirhosseini SH, Kormath Madam Raghupathy R, Sahoo SK, Wiebeler H, Chugh M, Kühne T. In silico investigation of Cu(In,Ga)Se2-based solar cells. Phys Chem Chem Phys. 2020;22:26682-26701. doi:10.1039/D0CP04712K apa: Mirhosseini, S. H., Kormath Madam Raghupathy, R., Sahoo, S. K., Wiebeler, H., Chugh, M., & Kühne, T. (2020). In silico investigation of Cu(In,Ga)Se2-based solar cells. Phys. Chem. Chem. Phys., 22, 26682–26701. https://doi.org/10.1039/D0CP04712K bibtex: '@article{Mirhosseini_Kormath Madam Raghupathy_Sahoo_Wiebeler_Chugh_Kühne_2020, title={In silico investigation of Cu(In,Ga)Se2-based solar cells}, volume={22}, DOI={10.1039/D0CP04712K}, journal={Phys. Chem. Chem. Phys.}, publisher={The Royal Society of Chemistry}, author={Mirhosseini, S. Hossein and Kormath Madam Raghupathy, Ramya and Sahoo, Sudhir K. and Wiebeler, Hendrik and Chugh, Manjusha and Kühne, Thomas}, year={2020}, pages={26682–26701} }' chicago: 'Mirhosseini, S. Hossein, Ramya Kormath Madam Raghupathy, Sudhir K. Sahoo, Hendrik Wiebeler, Manjusha Chugh, and Thomas Kühne. “In Silico Investigation of Cu(In,Ga)Se2-Based Solar Cells.” Phys. Chem. Chem. Phys. 22 (2020): 26682–701. https://doi.org/10.1039/D0CP04712K.' ieee: 'S. H. Mirhosseini, R. Kormath Madam Raghupathy, S. K. Sahoo, H. Wiebeler, M. Chugh, and T. Kühne, “In silico investigation of Cu(In,Ga)Se2-based solar cells,” Phys. Chem. Chem. Phys., vol. 22, pp. 26682–26701, 2020, doi: 10.1039/D0CP04712K.' mla: Mirhosseini, S. Hossein, et al. “In Silico Investigation of Cu(In,Ga)Se2-Based Solar Cells.” Phys. Chem. Chem. Phys., vol. 22, The Royal Society of Chemistry, 2020, pp. 26682–701, doi:10.1039/D0CP04712K. short: S.H. Mirhosseini, R. Kormath Madam Raghupathy, S.K. Sahoo, H. Wiebeler, M. Chugh, T. Kühne, Phys. Chem. Chem. Phys. 22 (2020) 26682–26701. date_created: 2021-01-29T15:21:45Z date_updated: 2022-07-21T09:34:02Z department: - _id: '304' doi: 10.1039/D0CP04712K intvolume: ' 22' language: - iso: eng page: 26682-26701 project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Phys. Chem. Chem. Phys. publisher: The Royal Society of Chemistry status: public title: In silico investigation of Cu(In,Ga)Se2-based solar cells type: journal_article user_id: '71051' volume: 22 year: '2020' ... --- _id: '21240' abstract: - lang: eng text: Rechargeable aqueous Zn-ion energy storage devices are promising candidates for next-generation energy storage technologies. However, the lack of highly reversible Zn2+-storage anode materials with low potential windows remains a primary concern. Here, we report a two-dimensional polyarylimide covalent organic framework (PI-COF) anode with high-kinetics Zn2+-storage capability. The well-organized pore channels of PI-COF allow the high accessibility of the build-in redox-active carbonyl groups and efficient ion diffusion with a low energy barrier. The constructed PI-COF anode exhibits a specific capacity (332 C g–1 or 92 mAh g–1 at 0.7 A g–1), a high rate capability (79.8% at 7 A g–1), and a long cycle life (85% over 4000 cycles). In situ Raman investigation and first-principle calculations clarify the two-step Zn2+-storage mechanism, in which imide carbonyl groups reversibly form negatively charged enolates. Dendrite-free full Zn-ion devices are fabricated by coupling PI-COF anodes with MnO2 cathodes, delivering excellent energy densities (23.9 ∼ 66.5 Wh kg–1) and supercapacitor-level power densities (133 ∼ 4782 W kg–1). This study demonstrates the feasibility of covalent organic framework as Zn2+-storage anodes and shows a promising prospect for constructing reliable aqueous energy storage devices. author: - first_name: Minghao full_name: Yu, Minghao last_name: Yu - first_name: Naisa full_name: Chandrasekhar, Naisa last_name: Chandrasekhar - first_name: Ramya full_name: Kormath Madam Raghupathy, Ramya id: '71692' last_name: Kormath Madam Raghupathy orcid: https://orcid.org/0000-0003-4667-9744 - first_name: Khoa Hoang full_name: Ly, Khoa Hoang last_name: Ly - first_name: Haozhe full_name: Zhang, Haozhe last_name: Zhang - first_name: Evgenia full_name: Dmitrieva, Evgenia last_name: Dmitrieva - first_name: Chaolun full_name: Liang, Chaolun last_name: Liang - first_name: Xihong full_name: Lu, Xihong last_name: Lu - first_name: Thomas full_name: Kühne, Thomas id: '49079' last_name: Kühne - first_name: S. Hossein full_name: Mirhosseini, S. Hossein id: '71051' last_name: Mirhosseini orcid: 0000-0001-6179-1545 - first_name: Inez M. full_name: Weidinger, Inez M. last_name: Weidinger - first_name: Xinliang full_name: Feng, Xinliang last_name: Feng citation: ama: Yu M, Chandrasekhar N, Kormath Madam Raghupathy R, et al. A High-Rate Two-Dimensional Polyarylimide Covalent Organic Framework Anode for Aqueous Zn-Ion Energy Storage Devices. Journal of the American Chemical Society. 2020;142(46):19570-19578. doi:10.1021/jacs.0c07992 apa: Yu, M., Chandrasekhar, N., Kormath Madam Raghupathy, R., Ly, K. H., Zhang, H., Dmitrieva, E., Liang, C., Lu, X., Kühne, T., Mirhosseini, S. H., Weidinger, I. M., & Feng, X. (2020). A High-Rate Two-Dimensional Polyarylimide Covalent Organic Framework Anode for Aqueous Zn-Ion Energy Storage Devices. Journal of the American Chemical Society, 142(46), 19570–19578. https://doi.org/10.1021/jacs.0c07992 bibtex: '@article{Yu_Chandrasekhar_Kormath Madam Raghupathy_Ly_Zhang_Dmitrieva_Liang_Lu_Kühne_Mirhosseini_et al._2020, title={A High-Rate Two-Dimensional Polyarylimide Covalent Organic Framework Anode for Aqueous Zn-Ion Energy Storage Devices}, volume={142}, DOI={10.1021/jacs.0c07992}, number={46}, journal={Journal of the American Chemical Society}, publisher={American Chemical Society}, author={Yu, Minghao and Chandrasekhar, Naisa and Kormath Madam Raghupathy, Ramya and Ly, Khoa Hoang and Zhang, Haozhe and Dmitrieva, Evgenia and Liang, Chaolun and Lu, Xihong and Kühne, Thomas and Mirhosseini, S. Hossein and et al.}, year={2020}, pages={19570–19578} }' chicago: 'Yu, Minghao, Naisa Chandrasekhar, Ramya Kormath Madam Raghupathy, Khoa Hoang Ly, Haozhe Zhang, Evgenia Dmitrieva, Chaolun Liang, et al. “A High-Rate Two-Dimensional Polyarylimide Covalent Organic Framework Anode for Aqueous Zn-Ion Energy Storage Devices.” Journal of the American Chemical Society 142, no. 46 (2020): 19570–78. https://doi.org/10.1021/jacs.0c07992.' ieee: 'M. Yu et al., “A High-Rate Two-Dimensional Polyarylimide Covalent Organic Framework Anode for Aqueous Zn-Ion Energy Storage Devices,” Journal of the American Chemical Society, vol. 142, no. 46, pp. 19570–19578, 2020, doi: 10.1021/jacs.0c07992.' mla: Yu, Minghao, et al. “A High-Rate Two-Dimensional Polyarylimide Covalent Organic Framework Anode for Aqueous Zn-Ion Energy Storage Devices.” Journal of the American Chemical Society, vol. 142, no. 46, American Chemical Society, 2020, pp. 19570–78, doi:10.1021/jacs.0c07992. short: M. Yu, N. Chandrasekhar, R. Kormath Madam Raghupathy, K.H. Ly, H. Zhang, E. Dmitrieva, C. Liang, X. Lu, T. Kühne, S.H. Mirhosseini, I.M. Weidinger, X. Feng, Journal of the American Chemical Society 142 (2020) 19570–19578. date_created: 2021-02-16T11:28:04Z date_updated: 2022-07-21T09:38:24Z department: - _id: '304' doi: 10.1021/jacs.0c07992 intvolume: ' 142' issue: '46' language: - iso: eng page: 19570-19578 project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Journal of the American Chemical Society publication_identifier: issn: - 0002-7863 publisher: American Chemical Society status: public title: A High-Rate Two-Dimensional Polyarylimide Covalent Organic Framework Anode for Aqueous Zn-Ion Energy Storage Devices type: journal_article user_id: '71051' volume: 142 year: '2020' ... --- _id: '17374' abstract: - lang: eng text: Lead halide perovskite semiconductors providing record efficiencies of solar cells have usually mixed compositions doped in A- and X-sites to enhance the phase stability. The cubic form of formamidinium (FA) lead iodide reveals excellent opto-electronic properties but transforms at room temperature (RT) into a hexagonal structure which does not effectively absorb visible light. This metastable form and the mechanism of its stabilization by Cs+ and Br− incorporation are poorly characterized and insufficiently understood. We report here the vibrational properties of cubic FAPbI3 investigated by DFT calculations on phonon frequencies and intensities, and micro-Raman spectroscopy. The effects of Cs+ and Br− partial substitution are discussed. We support our results with the study of FAPbBr3 which expands the identification of vibrational modes to the previously unpublished low frequency region (<500 cm−1). Our results show that the incorporation of Cs+ and Br− leads to the coupling of the displacement of the A-site components and weakens the bonds between FA+ and the PbX6 octahedra. We suggest that the enhancement of α-FAPbI3 stability can be a product of the release of tensile stresses in the Pb–X bond, which is reflected in a red-shift of the low frequency region of the Raman spectrum (<200 cm−1). author: - first_name: Josefa full_name: Ibaceta-Jaña, Josefa last_name: Ibaceta-Jaña - first_name: Ruslan full_name: Muydinov, Ruslan last_name: Muydinov - first_name: Pamela full_name: Rosado, Pamela last_name: Rosado - first_name: Hossein full_name: Mirhosseini, Hossein id: '71051' last_name: Mirhosseini orcid: https://orcid.org/0000-0001-6179-1545 - first_name: Manjusha full_name: Chugh, Manjusha id: '71511' last_name: Chugh - first_name: Olga full_name: Nazarenko, Olga last_name: Nazarenko - first_name: Dmitry N. full_name: Dirin, Dmitry N. last_name: Dirin - first_name: Dirk full_name: Heinrich, Dirk last_name: Heinrich - first_name: Markus R. full_name: Wagner, Markus R. last_name: Wagner - first_name: Thomas full_name: Kühne, Thomas id: '49079' last_name: Kühne - first_name: Bernd full_name: Szyszka, Bernd last_name: Szyszka - first_name: Maksym V. full_name: Kovalenko, Maksym V. last_name: Kovalenko - first_name: Axel full_name: Hoffmann, Axel last_name: Hoffmann citation: ama: Ibaceta-Jaña J, Muydinov R, Rosado P, et al. Vibrational dynamics in lead halide hybrid perovskites investigated by Raman spectroscopy. Phys Chem Chem Phys. 2020;22:5604-5614. doi:10.1039/C9CP06568G apa: Ibaceta-Jaña, J., Muydinov, R., Rosado, P., Mirhosseini, H., Chugh, M., Nazarenko, O., Dirin, D. N., Heinrich, D., Wagner, M. R., Kühne, T., Szyszka, B., Kovalenko, M. V., & Hoffmann, A. (2020). Vibrational dynamics in lead halide hybrid perovskites investigated by Raman spectroscopy. Phys. Chem. Chem. Phys., 22, 5604–5614. https://doi.org/10.1039/C9CP06568G bibtex: '@article{Ibaceta-Jaña_Muydinov_Rosado_Mirhosseini_Chugh_Nazarenko_Dirin_Heinrich_Wagner_Kühne_et al._2020, title={Vibrational dynamics in lead halide hybrid perovskites investigated by Raman spectroscopy}, volume={22}, DOI={10.1039/C9CP06568G}, journal={Phys. Chem. Chem. Phys.}, publisher={The Royal Society of Chemistry}, author={Ibaceta-Jaña, Josefa and Muydinov, Ruslan and Rosado, Pamela and Mirhosseini, Hossein and Chugh, Manjusha and Nazarenko, Olga and Dirin, Dmitry N. and Heinrich, Dirk and Wagner, Markus R. and Kühne, Thomas and et al.}, year={2020}, pages={5604–5614} }' chicago: 'Ibaceta-Jaña, Josefa, Ruslan Muydinov, Pamela Rosado, Hossein Mirhosseini, Manjusha Chugh, Olga Nazarenko, Dmitry N. Dirin, et al. “Vibrational Dynamics in Lead Halide Hybrid Perovskites Investigated by Raman Spectroscopy.” Phys. Chem. Chem. Phys. 22 (2020): 5604–14. https://doi.org/10.1039/C9CP06568G.' ieee: 'J. Ibaceta-Jaña et al., “Vibrational dynamics in lead halide hybrid perovskites investigated by Raman spectroscopy,” Phys. Chem. Chem. Phys., vol. 22, pp. 5604–5614, 2020, doi: 10.1039/C9CP06568G.' mla: Ibaceta-Jaña, Josefa, et al. “Vibrational Dynamics in Lead Halide Hybrid Perovskites Investigated by Raman Spectroscopy.” Phys. Chem. Chem. Phys., vol. 22, The Royal Society of Chemistry, 2020, pp. 5604–14, doi:10.1039/C9CP06568G. short: J. Ibaceta-Jaña, R. Muydinov, P. Rosado, H. Mirhosseini, M. Chugh, O. Nazarenko, D.N. Dirin, D. Heinrich, M.R. Wagner, T. Kühne, B. Szyszka, M.V. Kovalenko, A. Hoffmann, Phys. Chem. Chem. Phys. 22 (2020) 5604–5614. date_created: 2020-07-14T09:10:16Z date_updated: 2022-07-21T09:37:51Z department: - _id: '304' doi: 10.1039/C9CP06568G intvolume: ' 22' language: - iso: eng page: 5604-5614 project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Phys. Chem. Chem. Phys. publisher: The Royal Society of Chemistry status: public title: Vibrational dynamics in lead halide hybrid perovskites investigated by Raman spectroscopy type: journal_article user_id: '71051' volume: 22 year: '2020' ... --- _id: '17376' abstract: - lang: eng text: The record conversion efficiency of thin-film solar cells based on Cu(In,Ga)Se2 (CIGS) absorbers has exceeded 23%. Such a high performance is currently only attainable by the incorporation of heavy alkali metals like Cs into the absorber through an alkali fluoride post-deposition treatment (PDT). As the effect of the incorporated heavy alkali metals is under discussion, we investigated the local composition and microstructure of high efficiency CIGS solar cells via various high-resolution techniques in a combinatory approach. An accumulation of Cs is clearly detected at the p-n junction along with variations in the local CIGS composition, showing the formation of a beneficial secondary phase with a laterally inhomogeneous distribution. Additionally, Cs accumulations were detected at grain boundaries with a random misorientation of the adjacent grains where a reduced Cu concentration and increased In and Se concentrations are detected. No accumulation was found at Σ3 twin boundaries as well as the grain interior. These experimental findings are in excellent agreement with complementary ab-initio calculations, demonstrating that the grain boundaries are passivated by the presence of Cs. Further, it is unlikely that Cs with its large ionic radius is incorporated into the CIGS grains where it would cause detrimental defects. author: - first_name: Philipp full_name: Schöppe, Philipp last_name: Schöppe - first_name: Sven full_name: Schönherr, Sven last_name: Schönherr - first_name: Manjusha full_name: Chugh, Manjusha id: '71511' last_name: Chugh - first_name: Hossein full_name: Mirhosseini, Hossein id: '71051' last_name: Mirhosseini orcid: https://orcid.org/0000-0001-6179-1545 - first_name: Philip full_name: Jackson, Philip last_name: Jackson - first_name: Roland full_name: Wuerz, Roland last_name: Wuerz - first_name: Maurizio full_name: Ritzer, Maurizio last_name: Ritzer - first_name: Andreas full_name: Johannes, Andreas last_name: Johannes - first_name: Gema full_name: Martínez-Criado, Gema last_name: Martínez-Criado - first_name: Wolfgang full_name: Wisniewski, Wolfgang last_name: Wisniewski - first_name: Torsten full_name: Schwarz, Torsten last_name: Schwarz - first_name: Christian full_name: T. Plass, Christian last_name: T. Plass - first_name: Martin full_name: Hafermann, Martin last_name: Hafermann - first_name: Thomas full_name: Kühne, Thomas id: '49079' last_name: Kühne - first_name: Claudia full_name: S. Schnohr, Claudia last_name: S. Schnohr - first_name: Carsten full_name: Ronning, Carsten last_name: Ronning citation: ama: Schöppe P, Schönherr S, Chugh M, et al. Revealing the origin of the beneficial effect of cesium in highly efficient Cu(In,Ga)Se2 solar cells. Nano Energy. 2020;71:104622. doi:https://doi.org/10.1016/j.nanoen.2020.104622 apa: Schöppe, P., Schönherr, S., Chugh, M., Mirhosseini, H., Jackson, P., Wuerz, R., Ritzer, M., Johannes, A., Martínez-Criado, G., Wisniewski, W., Schwarz, T., T. Plass, C., Hafermann, M., Kühne, T., S. Schnohr, C., & Ronning, C. (2020). Revealing the origin of the beneficial effect of cesium in highly efficient Cu(In,Ga)Se2 solar cells. Nano Energy, 71, 104622. https://doi.org/10.1016/j.nanoen.2020.104622 bibtex: '@article{Schöppe_Schönherr_Chugh_Mirhosseini_Jackson_Wuerz_Ritzer_Johannes_Martínez-Criado_Wisniewski_et al._2020, title={Revealing the origin of the beneficial effect of cesium in highly efficient Cu(In,Ga)Se2 solar cells}, volume={71}, DOI={https://doi.org/10.1016/j.nanoen.2020.104622}, journal={Nano Energy}, author={Schöppe, Philipp and Schönherr, Sven and Chugh, Manjusha and Mirhosseini, Hossein and Jackson, Philip and Wuerz, Roland and Ritzer, Maurizio and Johannes, Andreas and Martínez-Criado, Gema and Wisniewski, Wolfgang and et al.}, year={2020}, pages={104622} }' chicago: 'Schöppe, Philipp, Sven Schönherr, Manjusha Chugh, Hossein Mirhosseini, Philip Jackson, Roland Wuerz, Maurizio Ritzer, et al. “Revealing the Origin of the Beneficial Effect of Cesium in Highly Efficient Cu(In,Ga)Se2 Solar Cells.” Nano Energy 71 (2020): 104622. https://doi.org/10.1016/j.nanoen.2020.104622.' ieee: 'P. Schöppe et al., “Revealing the origin of the beneficial effect of cesium in highly efficient Cu(In,Ga)Se2 solar cells,” Nano Energy, vol. 71, p. 104622, 2020, doi: https://doi.org/10.1016/j.nanoen.2020.104622.' mla: Schöppe, Philipp, et al. “Revealing the Origin of the Beneficial Effect of Cesium in Highly Efficient Cu(In,Ga)Se2 Solar Cells.” Nano Energy, vol. 71, 2020, p. 104622, doi:https://doi.org/10.1016/j.nanoen.2020.104622. short: P. Schöppe, S. Schönherr, M. Chugh, H. Mirhosseini, P. Jackson, R. Wuerz, M. Ritzer, A. Johannes, G. Martínez-Criado, W. Wisniewski, T. Schwarz, C. T. Plass, M. Hafermann, T. Kühne, C. S. Schnohr, C. Ronning, Nano Energy 71 (2020) 104622. date_created: 2020-07-14T09:15:14Z date_updated: 2022-07-21T09:46:46Z department: - _id: '304' doi: https://doi.org/10.1016/j.nanoen.2020.104622 intvolume: ' 71' language: - iso: eng page: '104622' project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Nano Energy publication_identifier: issn: - 2211-2855 status: public title: Revealing the origin of the beneficial effect of cesium in highly efficient Cu(In,Ga)Se2 solar cells type: journal_article user_id: '71051' volume: 71 year: '2020' ... --- _id: '20504' abstract: - lang: eng text: 'In recent years time domain speech separation has excelled over frequency domain separation in single channel scenarios and noise-free environments. In this paper we dissect the gains of the time-domain audio separation network (TasNet) approach by gradually replacing components of an utterance-level permutation invariant training (u-PIT) based separation system in the frequency domain until the TasNet system is reached, thus blending components of frequency domain approaches with those of time domain approaches. Some of the intermediate variants achieve comparable signal-to-distortion ratio (SDR) gains to TasNet, but retain the advantage of frequency domain processing: compatibility with classic signal processing tools such as frequency-domain beamforming and the human interpretability of the masks. Furthermore, we show that the scale invariant signal-to-distortion ratio (si-SDR) criterion used as loss function in TasNet is related to a logarithmic mean square error criterion and that it is this criterion which contributes most reliable to the performance advantage of TasNet. Finally, we critically assess which gains in a noise-free single channel environment generalize to more realistic reverberant conditions.' author: - first_name: Jens full_name: Heitkaemper, Jens id: '27643' last_name: Heitkaemper - first_name: Darius full_name: Jakobeit, Darius last_name: Jakobeit - first_name: Christoph full_name: Boeddeker, Christoph id: '40767' last_name: Boeddeker - first_name: Lukas full_name: Drude, Lukas last_name: Drude - first_name: Reinhold full_name: Haeb-Umbach, Reinhold id: '242' last_name: Haeb-Umbach citation: ama: 'Heitkaemper J, Jakobeit D, Boeddeker C, Drude L, Haeb-Umbach R. Demystifying TasNet: A Dissecting Approach. In: ICASSP 2020 Virtual Barcelona Spain. ; 2020.' apa: 'Heitkaemper, J., Jakobeit, D., Boeddeker, C., Drude, L., & Haeb-Umbach, R. (2020). Demystifying TasNet: A Dissecting Approach. ICASSP 2020 Virtual Barcelona Spain.' bibtex: '@inproceedings{Heitkaemper_Jakobeit_Boeddeker_Drude_Haeb-Umbach_2020, title={Demystifying TasNet: A Dissecting Approach}, booktitle={ICASSP 2020 Virtual Barcelona Spain}, author={Heitkaemper, Jens and Jakobeit, Darius and Boeddeker, Christoph and Drude, Lukas and Haeb-Umbach, Reinhold}, year={2020} }' chicago: 'Heitkaemper, Jens, Darius Jakobeit, Christoph Boeddeker, Lukas Drude, and Reinhold Haeb-Umbach. “Demystifying TasNet: A Dissecting Approach.” In ICASSP 2020 Virtual Barcelona Spain, 2020.' ieee: 'J. Heitkaemper, D. Jakobeit, C. Boeddeker, L. Drude, and R. Haeb-Umbach, “Demystifying TasNet: A Dissecting Approach,” 2020.' mla: 'Heitkaemper, Jens, et al. “Demystifying TasNet: A Dissecting Approach.” ICASSP 2020 Virtual Barcelona Spain, 2020.' short: 'J. Heitkaemper, D. Jakobeit, C. Boeddeker, L. Drude, R. Haeb-Umbach, in: ICASSP 2020 Virtual Barcelona Spain, 2020.' date_created: 2020-11-25T14:56:53Z date_updated: 2022-01-13T08:47:32Z ddc: - '000' department: - _id: '54' file: - access_level: closed content_type: application/pdf creator: jensheit date_created: 2020-12-11T12:36:37Z date_updated: 2020-12-11T12:36:37Z file_id: '20699' file_name: ms.pdf file_size: 3871374 relation: main_file success: 1 file_date_updated: 2020-12-11T12:36:37Z has_accepted_license: '1' keyword: - voice activity detection - speech activity detection - neural network - statistical speech processing language: - iso: eng project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: ICASSP 2020 Virtual Barcelona Spain quality_controlled: '1' status: public title: 'Demystifying TasNet: A Dissecting Approach' type: conference user_id: '40767' year: '2020' ... --- _id: '20141' author: - first_name: Stefan full_name: Heindorf, Stefan id: '11871' last_name: Heindorf orcid: 0000-0002-4525-6865 - first_name: Yan full_name: Scholten, Yan last_name: Scholten - first_name: Henning full_name: Wachsmuth, Henning id: '3900' last_name: Wachsmuth - first_name: Axel-Cyrille full_name: Ngonga Ngomo, Axel-Cyrille id: '65716' last_name: Ngonga Ngomo - first_name: Martin full_name: Potthast, Martin last_name: Potthast citation: ama: 'Heindorf S, Scholten Y, Wachsmuth H, Ngonga Ngomo A-C, Potthast M. CauseNet: Towards a Causality Graph Extracted from the Web. In: Proceedings of the 28th ACM International Conference on Information and Knowledge Management (CIKM 2020). ; 2020:3023-3030. doi:10.1145/3340531.3412763' apa: 'Heindorf, S., Scholten, Y., Wachsmuth, H., Ngonga Ngomo, A.-C., & Potthast, M. (2020). CauseNet: Towards a Causality Graph Extracted from the Web. Proceedings of the 28th ACM International Conference on Information and Knowledge Management (CIKM 2020), 3023–3030. https://doi.org/10.1145/3340531.3412763' bibtex: '@inproceedings{Heindorf_Scholten_Wachsmuth_Ngonga Ngomo_Potthast_2020, title={CauseNet: Towards a Causality Graph Extracted from the Web}, DOI={10.1145/3340531.3412763}, booktitle={Proceedings of the 28th ACM International Conference on Information and Knowledge Management (CIKM 2020)}, author={Heindorf, Stefan and Scholten, Yan and Wachsmuth, Henning and Ngonga Ngomo, Axel-Cyrille and Potthast, Martin}, year={2020}, pages={3023–3030} }' chicago: 'Heindorf, Stefan, Yan Scholten, Henning Wachsmuth, Axel-Cyrille Ngonga Ngomo, and Martin Potthast. “CauseNet: Towards a Causality Graph Extracted from the Web.” In Proceedings of the 28th ACM International Conference on Information and Knowledge Management (CIKM 2020), 3023–30, 2020. https://doi.org/10.1145/3340531.3412763.' ieee: 'S. Heindorf, Y. Scholten, H. Wachsmuth, A.-C. Ngonga Ngomo, and M. Potthast, “CauseNet: Towards a Causality Graph Extracted from the Web,” in Proceedings of the 28th ACM International Conference on Information and Knowledge Management (CIKM 2020), 2020, pp. 3023–3030, doi: 10.1145/3340531.3412763.' mla: 'Heindorf, Stefan, et al. “CauseNet: Towards a Causality Graph Extracted from the Web.” Proceedings of the 28th ACM International Conference on Information and Knowledge Management (CIKM 2020), 2020, pp. 3023–30, doi:10.1145/3340531.3412763.' short: 'S. Heindorf, Y. Scholten, H. Wachsmuth, A.-C. Ngonga Ngomo, M. Potthast, in: Proceedings of the 28th ACM International Conference on Information and Knowledge Management (CIKM 2020), 2020, pp. 3023–3030.' date_created: 2020-10-20T13:11:14Z date_updated: 2022-10-15T19:57:01Z department: - _id: '574' doi: 10.1145/3340531.3412763 language: - iso: eng main_file_link: - open_access: '1' url: https://papers.dice-research.org/2020/CIKM-20/heindorf_2020a_public.pdf oa: '1' page: 3023-3030 project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Proceedings of the 28th ACM International Conference on Information and Knowledge Management (CIKM 2020) status: public title: 'CauseNet: Towards a Causality Graph Extracted from the Web' type: conference user_id: '11871' year: '2020' ... --- _id: '20505' abstract: - lang: eng text: "Speech activity detection (SAD), which often rests on the fact that the noise is \"more'' stationary than speech, is particularly challenging in non-stationary environments, because the time variance of the acoustic scene makes it difficult to discriminate speech from noise. We propose two approaches to SAD, where one is based on statistical signal processing, while the other utilizes neural networks. The former employs sophisticated signal processing to track the noise and speech energies and is meant to support the case for a resource efficient, unsupervised signal processing approach.\r\nThe latter introduces a recurrent network layer that operates on short segments of the input speech to do temporal smoothing in the presence of non-stationary noise. The systems are tested on the Fearless Steps challenge database, which consists of the transmission data from the Apollo-11 space mission.\r\nThe statistical SAD achieves comparable detection performance to earlier proposed neural network based SADs, while the neural network based approach leads to a decision cost function of 1.07% on the evaluation set of the 2020 Fearless Steps Challenge, which sets a new state of the art." author: - first_name: Jens full_name: Heitkaemper, Jens id: '27643' last_name: Heitkaemper - first_name: Joerg full_name: Schmalenstroeer, Joerg id: '460' last_name: Schmalenstroeer - first_name: Reinhold full_name: Haeb-Umbach, Reinhold id: '242' last_name: Haeb-Umbach citation: ama: 'Heitkaemper J, Schmalenstroeer J, Haeb-Umbach R. Statistical and Neural Network Based Speech Activity Detection in Non-Stationary Acoustic Environments. In: INTERSPEECH 2020 Virtual Shanghai China. ; 2020.' apa: Heitkaemper, J., Schmalenstroeer, J., & Haeb-Umbach, R. (2020). Statistical and Neural Network Based Speech Activity Detection in Non-Stationary Acoustic Environments. INTERSPEECH 2020 Virtual Shanghai China. bibtex: '@inproceedings{Heitkaemper_Schmalenstroeer_Haeb-Umbach_2020, title={Statistical and Neural Network Based Speech Activity Detection in Non-Stationary Acoustic Environments}, booktitle={INTERSPEECH 2020 Virtual Shanghai China}, author={Heitkaemper, Jens and Schmalenstroeer, Joerg and Haeb-Umbach, Reinhold}, year={2020} }' chicago: Heitkaemper, Jens, Joerg Schmalenstroeer, and Reinhold Haeb-Umbach. “Statistical and Neural Network Based Speech Activity Detection in Non-Stationary Acoustic Environments.” In INTERSPEECH 2020 Virtual Shanghai China, 2020. ieee: J. Heitkaemper, J. Schmalenstroeer, and R. Haeb-Umbach, “Statistical and Neural Network Based Speech Activity Detection in Non-Stationary Acoustic Environments,” 2020. mla: Heitkaemper, Jens, et al. “Statistical and Neural Network Based Speech Activity Detection in Non-Stationary Acoustic Environments.” INTERSPEECH 2020 Virtual Shanghai China, 2020. short: 'J. Heitkaemper, J. Schmalenstroeer, R. Haeb-Umbach, in: INTERSPEECH 2020 Virtual Shanghai China, 2020.' date_created: 2020-11-25T15:03:19Z date_updated: 2023-10-26T08:28:49Z ddc: - '000' department: - _id: '54' file: - access_level: closed content_type: application/pdf creator: jensheit date_created: 2020-12-11T12:33:04Z date_updated: 2020-12-11T12:33:04Z file_id: '20697' file_name: ms.pdf file_size: 998706 relation: main_file success: 1 file_date_updated: 2020-12-11T12:33:04Z has_accepted_license: '1' keyword: - voice activity detection - speech activity detection - neural network - statistical speech processing language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: INTERSPEECH 2020 Virtual Shanghai China status: public title: Statistical and Neural Network Based Speech Activity Detection in Non-Stationary Acoustic Environments type: conference user_id: '460' year: '2020' ... --- _id: '20762' abstract: - lang: eng text: The rising interest in single-channel multi-speaker speech separation sparked development of End-to-End (E2E) approaches to multispeaker speech recognition. However, up until now, state-of-theart neural network–based time domain source separation has not yet been combined with E2E speech recognition. We here demonstrate how to combine a separation module based on a Convolutional Time domain Audio Separation Network (Conv-TasNet) with an E2E speech recognizer and how to train such a model jointly by distributing it over multiple GPUs or by approximating truncated back-propagation for the convolutional front-end. To put this work into perspective and illustrate the complexity of the design space, we provide a compact overview of single-channel multi-speaker recognition systems. Our experiments show a word error rate of 11.0% on WSJ0-2mix and indicate that our joint time domain model can yield substantial improvements over cascade DNN-HMM and monolithic E2E frequency domain systems proposed so far. author: - first_name: Thilo full_name: von Neumann, Thilo id: '49870' last_name: von Neumann orcid: https://orcid.org/0000-0002-7717-8670 - first_name: Keisuke full_name: Kinoshita, Keisuke last_name: Kinoshita - first_name: Lukas full_name: Drude, Lukas last_name: Drude - first_name: Christoph full_name: Boeddeker, Christoph id: '40767' last_name: Boeddeker - first_name: Marc full_name: Delcroix, Marc last_name: Delcroix - first_name: Tomohiro full_name: Nakatani, Tomohiro last_name: Nakatani - first_name: Reinhold full_name: Haeb-Umbach, Reinhold id: '242' last_name: Haeb-Umbach citation: ama: 'von Neumann T, Kinoshita K, Drude L, et al. End-to-End Training of Time Domain Audio Separation and Recognition. In: ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). ; 2020:7004-7008. doi:10.1109/ICASSP40776.2020.9053461' apa: von Neumann, T., Kinoshita, K., Drude, L., Boeddeker, C., Delcroix, M., Nakatani, T., & Haeb-Umbach, R. (2020). End-to-End Training of Time Domain Audio Separation and Recognition. ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 7004–7008. https://doi.org/10.1109/ICASSP40776.2020.9053461 bibtex: '@inproceedings{von Neumann_Kinoshita_Drude_Boeddeker_Delcroix_Nakatani_Haeb-Umbach_2020, title={End-to-End Training of Time Domain Audio Separation and Recognition}, DOI={10.1109/ICASSP40776.2020.9053461}, booktitle={ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, author={von Neumann, Thilo and Kinoshita, Keisuke and Drude, Lukas and Boeddeker, Christoph and Delcroix, Marc and Nakatani, Tomohiro and Haeb-Umbach, Reinhold}, year={2020}, pages={7004–7008} }' chicago: Neumann, Thilo von, Keisuke Kinoshita, Lukas Drude, Christoph Boeddeker, Marc Delcroix, Tomohiro Nakatani, and Reinhold Haeb-Umbach. “End-to-End Training of Time Domain Audio Separation and Recognition.” In ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 7004–8, 2020. https://doi.org/10.1109/ICASSP40776.2020.9053461. ieee: 'T. von Neumann et al., “End-to-End Training of Time Domain Audio Separation and Recognition,” in ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2020, pp. 7004–7008, doi: 10.1109/ICASSP40776.2020.9053461.' mla: von Neumann, Thilo, et al. “End-to-End Training of Time Domain Audio Separation and Recognition.” ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2020, pp. 7004–08, doi:10.1109/ICASSP40776.2020.9053461. short: 'T. von Neumann, K. Kinoshita, L. Drude, C. Boeddeker, M. Delcroix, T. Nakatani, R. Haeb-Umbach, in: ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2020, pp. 7004–7008.' date_created: 2020-12-16T14:07:54Z date_updated: 2023-11-15T12:17:45Z ddc: - '000' department: - _id: '54' doi: 10.1109/ICASSP40776.2020.9053461 file: - access_level: open_access content_type: application/pdf creator: huesera date_created: 2020-12-16T14:09:48Z date_updated: 2020-12-16T14:09:48Z file_id: '20763' file_name: ICASSP_2020_vonNeumann_Paper.pdf file_size: 192529 relation: main_file file_date_updated: 2020-12-16T14:09:48Z has_accepted_license: '1' language: - iso: eng oa: '1' page: 7004-7008 project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) quality_controlled: '1' status: public title: End-to-End Training of Time Domain Audio Separation and Recognition type: conference user_id: '49870' year: '2020' ... --- _id: '20764' abstract: - lang: eng text: 'Most approaches to multi-talker overlapped speech separation and recognition assume that the number of simultaneously active speakers is given, but in realistic situations, it is typically unknown. To cope with this, we extend an iterative speech extraction system with mechanisms to count the number of sources and combine it with a single-talker speech recognizer to form the first end-to-end multi-talker automatic speech recognition system for an unknown number of active speakers. Our experiments show very promising performance in counting accuracy, source separation and speech recognition on simulated clean mixtures from WSJ0-2mix and WSJ0-3mix. Among others, we set a new state-of-the-art word error rate on the WSJ0-2mix database. Furthermore, our system generalizes well to a larger number of speakers than it ever saw during training, as shown in experiments with the WSJ0-4mix database. ' author: - first_name: Thilo full_name: von Neumann, Thilo id: '49870' last_name: von Neumann orcid: https://orcid.org/0000-0002-7717-8670 - first_name: Christoph full_name: Boeddeker, Christoph id: '40767' last_name: Boeddeker - first_name: Lukas full_name: Drude, Lukas last_name: Drude - first_name: Keisuke full_name: Kinoshita, Keisuke last_name: Kinoshita - first_name: Marc full_name: Delcroix, Marc last_name: Delcroix - first_name: Tomohiro full_name: Nakatani, Tomohiro last_name: Nakatani - first_name: Reinhold full_name: Haeb-Umbach, Reinhold id: '242' last_name: Haeb-Umbach citation: ama: 'von Neumann T, Boeddeker C, Drude L, et al. Multi-Talker ASR for an Unknown Number of Sources: Joint Training of Source Counting, Separation and ASR. In: Proc. Interspeech 2020. ; 2020:3097-3101. doi:10.21437/Interspeech.2020-2519' apa: 'von Neumann, T., Boeddeker, C., Drude, L., Kinoshita, K., Delcroix, M., Nakatani, T., & Haeb-Umbach, R. (2020). Multi-Talker ASR for an Unknown Number of Sources: Joint Training of Source Counting, Separation and ASR. Proc. Interspeech 2020, 3097–3101. https://doi.org/10.21437/Interspeech.2020-2519' bibtex: '@inproceedings{von Neumann_Boeddeker_Drude_Kinoshita_Delcroix_Nakatani_Haeb-Umbach_2020, title={Multi-Talker ASR for an Unknown Number of Sources: Joint Training of Source Counting, Separation and ASR}, DOI={10.21437/Interspeech.2020-2519}, booktitle={Proc. Interspeech 2020}, author={von Neumann, Thilo and Boeddeker, Christoph and Drude, Lukas and Kinoshita, Keisuke and Delcroix, Marc and Nakatani, Tomohiro and Haeb-Umbach, Reinhold}, year={2020}, pages={3097–3101} }' chicago: 'Neumann, Thilo von, Christoph Boeddeker, Lukas Drude, Keisuke Kinoshita, Marc Delcroix, Tomohiro Nakatani, and Reinhold Haeb-Umbach. “Multi-Talker ASR for an Unknown Number of Sources: Joint Training of Source Counting, Separation and ASR.” In Proc. Interspeech 2020, 3097–3101, 2020. https://doi.org/10.21437/Interspeech.2020-2519.' ieee: 'T. von Neumann et al., “Multi-Talker ASR for an Unknown Number of Sources: Joint Training of Source Counting, Separation and ASR,” in Proc. Interspeech 2020, 2020, pp. 3097–3101, doi: 10.21437/Interspeech.2020-2519.' mla: 'von Neumann, Thilo, et al. “Multi-Talker ASR for an Unknown Number of Sources: Joint Training of Source Counting, Separation and ASR.” Proc. Interspeech 2020, 2020, pp. 3097–101, doi:10.21437/Interspeech.2020-2519.' short: 'T. von Neumann, C. Boeddeker, L. Drude, K. Kinoshita, M. Delcroix, T. Nakatani, R. Haeb-Umbach, in: Proc. Interspeech 2020, 2020, pp. 3097–3101.' date_created: 2020-12-16T14:12:45Z date_updated: 2023-11-15T12:17:57Z ddc: - '000' department: - _id: '54' doi: 10.21437/Interspeech.2020-2519 file: - access_level: open_access content_type: application/pdf creator: huesera date_created: 2020-12-16T14:14:14Z date_updated: 2020-12-16T14:14:14Z file_id: '20765' file_name: INTERSPEECH_2020_vonNeumann_Paper.pdf file_size: 267893 relation: main_file file_date_updated: 2020-12-16T14:14:14Z has_accepted_license: '1' language: - iso: eng oa: '1' page: 3097-3101 project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Proc. Interspeech 2020 quality_controlled: '1' status: public title: 'Multi-Talker ASR for an Unknown Number of Sources: Joint Training of Source Counting, Separation and ASR' type: conference user_id: '49870' year: '2020' ... --- _id: '20753' abstract: - lang: eng text: 'In this paper we present our system for the detection and classification of acoustic scenes and events (DCASE) 2020 Challenge Task 4: Sound event detection and separation in domestic environments. We introduce two new models: the forward-backward convolutional recurrent neural network (FBCRNN) and the tag-conditioned convolutional neural network (CNN). The FBCRNN employs two recurrent neural network (RNN) classifiers sharing the same CNN for preprocessing. With one RNN processing a recording in forward direction and the other in backward direction, the two networks are trained to jointly predict audio tags, i.e., weak labels, at each time step within a recording, given that at each time step they have jointly processed the whole recording. The proposed training encourages the classifiers to tag events as soon as possible. Therefore, after training, the networks can be applied to shorter audio segments of, e.g., 200ms, allowing sound event detection (SED). Further, we propose a tag-conditioned CNN to complement SED. It is trained to predict strong labels while using (predicted) tags, i.e., weak labels, as additional input. For training pseudo strong labels from a FBCRNN ensemble are used. The presented system scored the fourth and third place in the systems and teams rankings, respectively. Subsequent improvements allow our system to even outperform the challenge baseline and winner systems in average by, respectively, 18.0% and 2.2% event-based F1-score on the validation set. Source code is publicly available at https://github.com/fgnt/pb_sed.' author: - first_name: Janek full_name: Ebbers, Janek id: '34851' last_name: Ebbers - first_name: Reinhold full_name: Haeb-Umbach, Reinhold id: '242' last_name: Haeb-Umbach citation: ama: 'Ebbers J, Haeb-Umbach R. Forward-Backward Convolutional Recurrent Neural Networks and Tag-Conditioned Convolutional Neural Networks for Weakly Labeled Semi-Supervised Sound Event Detection. In: Proceedings of the Detection and Classification of Acoustic Scenes and Events 2020 Workshop (DCASE2020). ; 2020.' apa: Ebbers, J., & Haeb-Umbach, R. (2020). Forward-Backward Convolutional Recurrent Neural Networks and Tag-Conditioned Convolutional Neural Networks for Weakly Labeled Semi-Supervised Sound Event Detection. Proceedings of the Detection and Classification of Acoustic Scenes and Events 2020 Workshop (DCASE2020). bibtex: '@inproceedings{Ebbers_Haeb-Umbach_2020, title={Forward-Backward Convolutional Recurrent Neural Networks and Tag-Conditioned Convolutional Neural Networks for Weakly Labeled Semi-Supervised Sound Event Detection}, booktitle={Proceedings of the Detection and Classification of Acoustic Scenes and Events 2020 Workshop (DCASE2020)}, author={Ebbers, Janek and Haeb-Umbach, Reinhold}, year={2020} }' chicago: Ebbers, Janek, and Reinhold Haeb-Umbach. “Forward-Backward Convolutional Recurrent Neural Networks and Tag-Conditioned Convolutional Neural Networks for Weakly Labeled Semi-Supervised Sound Event Detection.” In Proceedings of the Detection and Classification of Acoustic Scenes and Events 2020 Workshop (DCASE2020), 2020. ieee: J. Ebbers and R. Haeb-Umbach, “Forward-Backward Convolutional Recurrent Neural Networks and Tag-Conditioned Convolutional Neural Networks for Weakly Labeled Semi-Supervised Sound Event Detection,” 2020. mla: Ebbers, Janek, and Reinhold Haeb-Umbach. “Forward-Backward Convolutional Recurrent Neural Networks and Tag-Conditioned Convolutional Neural Networks for Weakly Labeled Semi-Supervised Sound Event Detection.” Proceedings of the Detection and Classification of Acoustic Scenes and Events 2020 Workshop (DCASE2020), 2020. short: 'J. Ebbers, R. Haeb-Umbach, in: Proceedings of the Detection and Classification of Acoustic Scenes and Events 2020 Workshop (DCASE2020), 2020.' date_created: 2020-12-16T08:55:27Z date_updated: 2023-11-22T08:27:32Z ddc: - '000' department: - _id: '54' file: - access_level: open_access content_type: application/pdf creator: huesera date_created: 2020-12-16T08:57:22Z date_updated: 2020-12-16T08:57:22Z file_id: '20754' file_name: DCASE2020Workshop_Ebbers_Paper.pdf file_size: 108326 relation: main_file file_date_updated: 2020-12-16T08:57:22Z has_accepted_license: '1' language: - iso: eng oa: '1' project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Proceedings of the Detection and Classification of Acoustic Scenes and Events 2020 Workshop (DCASE2020) quality_controlled: '1' status: public title: Forward-Backward Convolutional Recurrent Neural Networks and Tag-Conditioned Convolutional Neural Networks for Weakly Labeled Semi-Supervised Sound Event Detection type: conference user_id: '34851' year: '2020' ... --- _id: '16311' author: - first_name: Lukas full_name: Burkhardt, Lukas id: '54038' last_name: Burkhardt orcid: 0000-0003-0747-9811 - first_name: Yannik full_name: Vukadinovic, Yannik last_name: Vukadinovic - first_name: Michał full_name: Nowakowski, Michał id: '78878' last_name: Nowakowski orcid: 0000-0002-3734-7011 - first_name: Aleksandr full_name: Kalinko, Aleksandr last_name: Kalinko - first_name: Julian full_name: Rudolph, Julian last_name: Rudolph - first_name: Per-Anders full_name: Carlsson, Per-Anders last_name: Carlsson - first_name: Christoph R. full_name: Jacob, Christoph R. last_name: Jacob - first_name: Matthias full_name: Bauer, Matthias id: '47241' last_name: Bauer orcid: 0000-0002-9294-6076 citation: ama: Burkhardt L, Vukadinovic Y, Nowakowski M, et al. Electronic Structure of the Hieber Anion [Fe(CO)3(NO)]− Revisited by X-ray Emission and Absorption Spectroscopy. Inorganic Chemistry. Published online 2020:3551-3561. doi:10.1021/acs.inorgchem.9b02092 apa: Burkhardt, L., Vukadinovic, Y., Nowakowski, M., Kalinko, A., Rudolph, J., Carlsson, P.-A., Jacob, C. R., & Bauer, M. (2020). Electronic Structure of the Hieber Anion [Fe(CO)3(NO)]− Revisited by X-ray Emission and Absorption Spectroscopy. Inorganic Chemistry, 3551–3561. https://doi.org/10.1021/acs.inorgchem.9b02092 bibtex: '@article{Burkhardt_Vukadinovic_Nowakowski_Kalinko_Rudolph_Carlsson_Jacob_Bauer_2020, title={Electronic Structure of the Hieber Anion [Fe(CO)3(NO)]− Revisited by X-ray Emission and Absorption Spectroscopy}, DOI={10.1021/acs.inorgchem.9b02092}, journal={Inorganic Chemistry}, author={Burkhardt, Lukas and Vukadinovic, Yannik and Nowakowski, Michał and Kalinko, Aleksandr and Rudolph, Julian and Carlsson, Per-Anders and Jacob, Christoph R. and Bauer, Matthias}, year={2020}, pages={3551–3561} }' chicago: Burkhardt, Lukas, Yannik Vukadinovic, Michał Nowakowski, Aleksandr Kalinko, Julian Rudolph, Per-Anders Carlsson, Christoph R. Jacob, and Matthias Bauer. “Electronic Structure of the Hieber Anion [Fe(CO)3(NO)]− Revisited by X-Ray Emission and Absorption Spectroscopy.” Inorganic Chemistry, 2020, 3551–61. https://doi.org/10.1021/acs.inorgchem.9b02092. ieee: 'L. Burkhardt et al., “Electronic Structure of the Hieber Anion [Fe(CO)3(NO)]− Revisited by X-ray Emission and Absorption Spectroscopy,” Inorganic Chemistry, pp. 3551–3561, 2020, doi: 10.1021/acs.inorgchem.9b02092.' mla: Burkhardt, Lukas, et al. “Electronic Structure of the Hieber Anion [Fe(CO)3(NO)]− Revisited by X-Ray Emission and Absorption Spectroscopy.” Inorganic Chemistry, 2020, pp. 3551–61, doi:10.1021/acs.inorgchem.9b02092. short: L. Burkhardt, Y. Vukadinovic, M. Nowakowski, A. Kalinko, J. Rudolph, P.-A. Carlsson, C.R. Jacob, M. Bauer, Inorganic Chemistry (2020) 3551–3561. date_created: 2020-03-23T10:38:47Z date_updated: 2024-05-07T11:44:33Z department: - _id: '43' - _id: '35' - _id: '306' doi: 10.1021/acs.inorgchem.9b02092 language: - iso: eng page: 3551-3561 project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Inorganic Chemistry publication_identifier: issn: - 0020-1669 - 1520-510X publication_status: published status: public title: Electronic Structure of the Hieber Anion [Fe(CO)3(NO)]− Revisited by X-ray Emission and Absorption Spectroscopy type: journal_article user_id: '48467' year: '2020' ... --- _id: '17322' author: - first_name: Amlan full_name: Mukherjee, Amlan last_name: Mukherjee - first_name: Alex full_name: Widhalm, Alex last_name: Widhalm - first_name: Dustin full_name: Siebert, Dustin last_name: Siebert - first_name: Sebastian full_name: Krehs, Sebastian last_name: Krehs - first_name: Nandlal full_name: Sharma, Nandlal last_name: Sharma - first_name: Andreas full_name: Thiede, Andreas id: '538' last_name: Thiede - first_name: Dirk full_name: Reuter, Dirk id: '37763' last_name: Reuter - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 - first_name: Artur full_name: Zrenner, Artur id: '606' last_name: Zrenner orcid: 0000-0002-5190-0944 citation: ama: Mukherjee A, Widhalm A, Siebert D, et al. Electrically controlled rapid adiabatic passage in a single quantum dot. Applied Physics Letters. 2020;116:251103. doi:10.1063/5.0012257 apa: Mukherjee, A., Widhalm, A., Siebert, D., Krehs, S., Sharma, N., Thiede, A., Reuter, D., Förstner, J., & Zrenner, A. (2020). Electrically controlled rapid adiabatic passage in a single quantum dot. Applied Physics Letters, 116, 251103. https://doi.org/10.1063/5.0012257 bibtex: '@article{Mukherjee_Widhalm_Siebert_Krehs_Sharma_Thiede_Reuter_Förstner_Zrenner_2020, title={Electrically controlled rapid adiabatic passage in a single quantum dot}, volume={116}, DOI={10.1063/5.0012257}, journal={Applied Physics Letters}, author={Mukherjee, Amlan and Widhalm, Alex and Siebert, Dustin and Krehs, Sebastian and Sharma, Nandlal and Thiede, Andreas and Reuter, Dirk and Förstner, Jens and Zrenner, Artur}, year={2020}, pages={251103} }' chicago: 'Mukherjee, Amlan, Alex Widhalm, Dustin Siebert, Sebastian Krehs, Nandlal Sharma, Andreas Thiede, Dirk Reuter, Jens Förstner, and Artur Zrenner. “Electrically Controlled Rapid Adiabatic Passage in a Single Quantum Dot.” Applied Physics Letters 116 (2020): 251103. https://doi.org/10.1063/5.0012257.' ieee: 'A. Mukherjee et al., “Electrically controlled rapid adiabatic passage in a single quantum dot,” Applied Physics Letters, vol. 116, p. 251103, 2020, doi: 10.1063/5.0012257.' mla: Mukherjee, Amlan, et al. “Electrically Controlled Rapid Adiabatic Passage in a Single Quantum Dot.” Applied Physics Letters, vol. 116, 2020, p. 251103, doi:10.1063/5.0012257. short: A. Mukherjee, A. Widhalm, D. Siebert, S. Krehs, N. Sharma, A. Thiede, D. Reuter, J. Förstner, A. Zrenner, Applied Physics Letters 116 (2020) 251103. date_created: 2020-06-25T12:31:42Z date_updated: 2023-01-24T11:12:09Z ddc: - '530' department: - _id: '61' - _id: '230' - _id: '429' - _id: '51' doi: 10.1063/5.0012257 file: - access_level: request content_type: application/pdf creator: fossie date_created: 2020-06-25T12:45:04Z date_updated: 2022-01-06T06:53:07Z embargo: 2021-06-25 embargo_to: open_access file_id: '17325' file_name: 2020-06 Widhalm - APL - Electrically controlled RAP in single QD (official).pdf file_size: 1359326 relation: main_file file_date_updated: 2022-01-06T06:53:07Z has_accepted_license: '1' intvolume: ' 116' keyword: - tet_topic_qd language: - iso: eng page: '251103' project: - _id: '56' name: TRR 142 - Project Area C - _id: '74' name: TRR 142 - Subproject C4 - _id: '53' name: TRR 142 - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Applied Physics Letters publication_identifier: issn: - 0003-6951 - 1077-3118 publication_status: published status: public title: Electrically controlled rapid adiabatic passage in a single quantum dot type: journal_article user_id: '158' volume: 116 year: '2020' ... --- _id: '40233' article_number: '2000463' author: - first_name: Lukas full_name: Meier, Lukas last_name: Meier - first_name: Christian full_name: Braun, Christian last_name: Braun - first_name: Thomas full_name: Hannappel, Thomas last_name: Hannappel - first_name: Wolf Gero full_name: Schmidt, Wolf Gero id: '468' last_name: Schmidt orcid: 0000-0002-2717-5076 citation: ama: Meier L, Braun C, Hannappel T, Schmidt WG. Band Alignment at Ga x In 1– x P/Al y In 1– y P Alloy Interfaces from Hybrid Density Functional Theory Calculations. physica status solidi (b). 2020;258(2). doi:10.1002/pssb.202000463 apa: Meier, L., Braun, C., Hannappel, T., & Schmidt, W. G. (2020). Band Alignment at Ga x In 1– x P/Al y In 1– y P Alloy Interfaces from Hybrid Density Functional Theory Calculations. Physica Status Solidi (b), 258(2), Article 2000463. https://doi.org/10.1002/pssb.202000463 bibtex: '@article{Meier_Braun_Hannappel_Schmidt_2020, title={Band Alignment at Ga x In 1– x P/Al y In 1– y P Alloy Interfaces from Hybrid Density Functional Theory Calculations}, volume={258}, DOI={10.1002/pssb.202000463}, number={22000463}, journal={physica status solidi (b)}, publisher={Wiley}, author={Meier, Lukas and Braun, Christian and Hannappel, Thomas and Schmidt, Wolf Gero}, year={2020} }' chicago: Meier, Lukas, Christian Braun, Thomas Hannappel, and Wolf Gero Schmidt. “Band Alignment at Ga x In 1– x P/Al y In 1– y P Alloy Interfaces from Hybrid Density Functional Theory Calculations.” Physica Status Solidi (b) 258, no. 2 (2020). https://doi.org/10.1002/pssb.202000463. ieee: 'L. Meier, C. Braun, T. Hannappel, and W. G. Schmidt, “Band Alignment at Ga x In 1– x P/Al y In 1– y P Alloy Interfaces from Hybrid Density Functional Theory Calculations,” physica status solidi (b), vol. 258, no. 2, Art. no. 2000463, 2020, doi: 10.1002/pssb.202000463.' mla: Meier, Lukas, et al. “Band Alignment at Ga x In 1– x P/Al y In 1– y P Alloy Interfaces from Hybrid Density Functional Theory Calculations.” Physica Status Solidi (b), vol. 258, no. 2, 2000463, Wiley, 2020, doi:10.1002/pssb.202000463. short: L. Meier, C. Braun, T. Hannappel, W.G. Schmidt, Physica Status Solidi (b) 258 (2020). date_created: 2023-01-26T09:33:46Z date_updated: 2023-04-20T14:18:36Z department: - _id: '15' - _id: '170' - _id: '295' - _id: '230' - _id: '35' doi: 10.1002/pssb.202000463 intvolume: ' 258' issue: '2' keyword: - Condensed Matter Physics - Electronic - Optical and Magnetic Materials language: - iso: eng project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: physica status solidi (b) publication_identifier: issn: - 0370-1972 - 1521-3951 publication_status: published publisher: Wiley status: public title: Band Alignment at Ga x In 1– x P/Al y In 1– y P Alloy Interfaces from Hybrid Density Functional Theory Calculations type: journal_article user_id: '16199' volume: 258 year: '2020' ... --- _id: '17067' article_number: '100480' author: - first_name: Eugen full_name: Speiser, Eugen last_name: Speiser - first_name: Norbert full_name: Esser, Norbert last_name: Esser - first_name: Benedikt full_name: Halbig, Benedikt last_name: Halbig - first_name: Jean full_name: Geurts, Jean last_name: Geurts - first_name: Wolf Gero full_name: Schmidt, Wolf Gero id: '468' last_name: Schmidt orcid: 0000-0002-2717-5076 - first_name: Simone full_name: Sanna, Simone last_name: Sanna citation: ama: Speiser E, Esser N, Halbig B, Geurts J, Schmidt WG, Sanna S. Vibrational Raman spectroscopy on adsorbate-induced low-dimensional surface structures. Surface Science Reports. 2020;75(1). doi:10.1016/j.surfrep.2020.100480 apa: Speiser, E., Esser, N., Halbig, B., Geurts, J., Schmidt, W. G., & Sanna, S. (2020). Vibrational Raman spectroscopy on adsorbate-induced low-dimensional surface structures. Surface Science Reports, 75(1), Article 100480. https://doi.org/10.1016/j.surfrep.2020.100480 bibtex: '@article{Speiser_Esser_Halbig_Geurts_Schmidt_Sanna_2020, title={Vibrational Raman spectroscopy on adsorbate-induced low-dimensional surface structures}, volume={75}, DOI={10.1016/j.surfrep.2020.100480}, number={1100480}, journal={Surface Science Reports}, author={Speiser, Eugen and Esser, Norbert and Halbig, Benedikt and Geurts, Jean and Schmidt, Wolf Gero and Sanna, Simone}, year={2020} }' chicago: Speiser, Eugen, Norbert Esser, Benedikt Halbig, Jean Geurts, Wolf Gero Schmidt, and Simone Sanna. “Vibrational Raman Spectroscopy on Adsorbate-Induced Low-Dimensional Surface Structures.” Surface Science Reports 75, no. 1 (2020). https://doi.org/10.1016/j.surfrep.2020.100480. ieee: 'E. Speiser, N. Esser, B. Halbig, J. Geurts, W. G. Schmidt, and S. Sanna, “Vibrational Raman spectroscopy on adsorbate-induced low-dimensional surface structures,” Surface Science Reports, vol. 75, no. 1, Art. no. 100480, 2020, doi: 10.1016/j.surfrep.2020.100480.' mla: Speiser, Eugen, et al. “Vibrational Raman Spectroscopy on Adsorbate-Induced Low-Dimensional Surface Structures.” Surface Science Reports, vol. 75, no. 1, 100480, 2020, doi:10.1016/j.surfrep.2020.100480. short: E. Speiser, N. Esser, B. Halbig, J. Geurts, W.G. Schmidt, S. Sanna, Surface Science Reports 75 (2020). date_created: 2020-05-29T09:52:49Z date_updated: 2023-04-20T14:17:42Z department: - _id: '15' - _id: '170' - _id: '295' - _id: '429' - _id: '230' - _id: '35' doi: 10.1016/j.surfrep.2020.100480 intvolume: ' 75' issue: '1' language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' - _id: '53' name: 'TRR 142: TRR 142' - _id: '55' name: 'TRR 142 - B: TRR 142 - Project Area B' - _id: '69' name: 'TRR 142 - B4: TRR 142 - Subproject B4' publication: Surface Science Reports publication_identifier: issn: - 0167-5729 publication_status: published status: public title: Vibrational Raman spectroscopy on adsorbate-induced low-dimensional surface structures type: journal_article user_id: '16199' volume: 75 year: '2020' ... --- _id: '40435' abstract: - lang: eng text:Coulomb binding energy is reduced when a few-molecule integer charge transfer complex (ICTC) is formed.
author: - first_name: Chuan-Ding full_name: Dong, Chuan-Ding id: '67188' last_name: Dong - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 citation: ama: Dong C-D, Schumacher S. Molecular doping in few-molecule polymer-dopant complexes shows reduced Coulomb binding. Journal of Materials Chemistry C. 2020;8(34):11929-11935. doi:10.1039/d0tc02185g apa: Dong, C.-D., & Schumacher, S. (2020). Molecular doping in few-molecule polymer-dopant complexes shows reduced Coulomb binding. Journal of Materials Chemistry C, 8(34), 11929–11935. https://doi.org/10.1039/d0tc02185g bibtex: '@article{Dong_Schumacher_2020, title={Molecular doping in few-molecule polymer-dopant complexes shows reduced Coulomb binding}, volume={8}, DOI={10.1039/d0tc02185g}, number={34}, journal={Journal of Materials Chemistry C}, publisher={Royal Society of Chemistry (RSC)}, author={Dong, Chuan-Ding and Schumacher, Stefan}, year={2020}, pages={11929–11935} }' chicago: 'Dong, Chuan-Ding, and Stefan Schumacher. “Molecular Doping in Few-Molecule Polymer-Dopant Complexes Shows Reduced Coulomb Binding.” Journal of Materials Chemistry C 8, no. 34 (2020): 11929–35. https://doi.org/10.1039/d0tc02185g.' ieee: 'C.-D. Dong and S. Schumacher, “Molecular doping in few-molecule polymer-dopant complexes shows reduced Coulomb binding,” Journal of Materials Chemistry C, vol. 8, no. 34, pp. 11929–11935, 2020, doi: 10.1039/d0tc02185g.' mla: Dong, Chuan-Ding, and Stefan Schumacher. “Molecular Doping in Few-Molecule Polymer-Dopant Complexes Shows Reduced Coulomb Binding.” Journal of Materials Chemistry C, vol. 8, no. 34, Royal Society of Chemistry (RSC), 2020, pp. 11929–35, doi:10.1039/d0tc02185g. short: C.-D. Dong, S. Schumacher, Journal of Materials Chemistry C 8 (2020) 11929–11935. date_created: 2023-01-26T16:01:22Z date_updated: 2023-04-20T15:39:34Z department: - _id: '15' - _id: '170' - _id: '297' - _id: '230' - _id: '35' doi: 10.1039/d0tc02185g intvolume: ' 8' issue: '34' keyword: - Materials Chemistry - General Chemistry language: - iso: eng page: 11929-11935 project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Journal of Materials Chemistry C publication_identifier: issn: - 2050-7526 - 2050-7534 publication_status: published publisher: Royal Society of Chemistry (RSC) status: public title: Molecular doping in few-molecule polymer-dopant complexes shows reduced Coulomb binding type: journal_article user_id: '16199' volume: 8 year: '2020' ... --- _id: '19190' abstract: - lang: eng text: "Polarons in dielectric crystals play a crucial role for applications in integrated electronics and optoelectronics. In this work, we use density-functional theory and Green's function methods to explore the microscopic structure and spectroscopic signatures of electron polarons in lithium niobate (LiNbO3). Total-energy calculations and the comparison of calculated electron paramagnetic resonance data with available measurements reveal the formation of bound \r\npolarons at Nb_Li antisite defects with a quasi-Jahn-Teller distorted, tilted configuration. The defect-formation energies further indicate that (bi)polarons may form not only at \r\nNb_Li antisites but also at structures where the antisite Nb atom moves into a neighboring empty oxygen octahedron. Based on these structure models, and on the calculated charge-transition levels and potential-energy barriers, we propose two mechanisms for the optical and thermal splitting of bipolarons, which provide a natural explanation for the reported two-path recombination of bipolarons. Optical-response calculations based on the Bethe-Salpeter equation, in combination with available experimental data and new measurements of the optical absorption spectrum, further corroborate the geometries proposed here for free and defect-bound (bi)polarons." article_number: '043002' article_type: original author: - first_name: Falko full_name: Schmidt, Falko id: '35251' last_name: Schmidt orcid: 0000-0002-5071-5528 - first_name: Agnieszka L. full_name: Kozub, Agnieszka L. id: '77566' last_name: Kozub orcid: https://orcid.org/0000-0001-6584-0201 - first_name: Timur full_name: Biktagirov, Timur id: '65612' last_name: Biktagirov - first_name: Christof full_name: Eigner, Christof id: '13244' last_name: Eigner orcid: https://orcid.org/0000-0002-5693-3083 - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Arno full_name: Schindlmayr, Arno id: '458' last_name: Schindlmayr orcid: 0000-0002-4855-071X - first_name: Wolf Gero full_name: Schmidt, Wolf Gero id: '468' last_name: Schmidt orcid: 0000-0002-2717-5076 - first_name: Uwe full_name: Gerstmann, Uwe id: '171' last_name: Gerstmann orcid: 0000-0002-4476-223X citation: ama: 'Schmidt F, Kozub AL, Biktagirov T, et al. Free and defect-bound (bi)polarons in LiNbO3: Atomic structure and spectroscopic signatures from ab initio calculations. Physical Review Research. 2020;2(4). doi:10.1103/PhysRevResearch.2.043002' apa: 'Schmidt, F., Kozub, A. L., Biktagirov, T., Eigner, C., Silberhorn, C., Schindlmayr, A., Schmidt, W. G., & Gerstmann, U. (2020). Free and defect-bound (bi)polarons in LiNbO3: Atomic structure and spectroscopic signatures from ab initio calculations. Physical Review Research, 2(4), Article 043002. https://doi.org/10.1103/PhysRevResearch.2.043002' bibtex: '@article{Schmidt_Kozub_Biktagirov_Eigner_Silberhorn_Schindlmayr_Schmidt_Gerstmann_2020, title={Free and defect-bound (bi)polarons in LiNbO3: Atomic structure and spectroscopic signatures from ab initio calculations}, volume={2}, DOI={10.1103/PhysRevResearch.2.043002}, number={4043002}, journal={Physical Review Research}, publisher={American Physical Society}, author={Schmidt, Falko and Kozub, Agnieszka L. and Biktagirov, Timur and Eigner, Christof and Silberhorn, Christine and Schindlmayr, Arno and Schmidt, Wolf Gero and Gerstmann, Uwe}, year={2020} }' chicago: 'Schmidt, Falko, Agnieszka L. Kozub, Timur Biktagirov, Christof Eigner, Christine Silberhorn, Arno Schindlmayr, Wolf Gero Schmidt, and Uwe Gerstmann. “Free and Defect-Bound (Bi)Polarons in LiNbO3: Atomic Structure and Spectroscopic Signatures from Ab Initio Calculations.” Physical Review Research 2, no. 4 (2020). https://doi.org/10.1103/PhysRevResearch.2.043002.' ieee: 'F. Schmidt et al., “Free and defect-bound (bi)polarons in LiNbO3: Atomic structure and spectroscopic signatures from ab initio calculations,” Physical Review Research, vol. 2, no. 4, Art. no. 043002, 2020, doi: 10.1103/PhysRevResearch.2.043002.' mla: 'Schmidt, Falko, et al. “Free and Defect-Bound (Bi)Polarons in LiNbO3: Atomic Structure and Spectroscopic Signatures from Ab Initio Calculations.” Physical Review Research, vol. 2, no. 4, 043002, American Physical Society, 2020, doi:10.1103/PhysRevResearch.2.043002.' short: F. Schmidt, A.L. Kozub, T. Biktagirov, C. Eigner, C. Silberhorn, A. Schindlmayr, W.G. Schmidt, U. Gerstmann, Physical Review Research 2 (2020). date_created: 2020-09-09T09:35:21Z date_updated: 2023-04-20T16:06:21Z ddc: - '530' department: - _id: '296' - _id: '230' - _id: '429' - _id: '295' - _id: '288' - _id: '15' - _id: '170' - _id: '35' - _id: '790' doi: 10.1103/PhysRevResearch.2.043002 external_id: isi: - '000604206300002' file: - access_level: open_access content_type: application/pdf creator: schindlm date_created: 2020-10-02T07:27:38Z date_updated: 2020-10-02T07:37:24Z description: Creative Commons Attribution 4.0 International Public License (CC BY 4.0) file_id: '19843' file_name: PhysRevResearch.2.043002.pdf file_size: 1955183 relation: main_file title: 'Free and defect-bound (bi)polarons in LiNbO3: Atomic structure and spectroscopic signatures from ab initio calculations' file_date_updated: 2020-10-02T07:37:24Z has_accepted_license: '1' intvolume: ' 2' isi: '1' issue: '4' language: - iso: eng oa: '1' project: - _id: '53' name: TRR 142 - _id: '55' name: TRR 142 - Project Area B - _id: '69' name: TRR 142 - Subproject B4 - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Physical Review Research publication_identifier: eissn: - 2643-1564 publication_status: published publisher: American Physical Society quality_controlled: '1' status: public title: 'Free and defect-bound (bi)polarons in LiNbO3: Atomic structure and spectroscopic signatures from ab initio calculations' type: journal_article user_id: '16199' volume: 2 year: '2020' ...