article published Daniel Berghoff author 38175 Johannes Bühler author Mischa Bonn author Alfred Leitenstorfer author Torsten Meier author 3440000-0001-8864-2072 Heejae Kim author 15 department 170 department 293 department 230 department 35 department TRR 142: TRR 142 project TRR 142 - A: TRR 142 - Project Area A project TRR 142 - A2: TRR 142 - Subproject A2 project <jats:title>Abstract</jats:title><jats:p>Methylammonium lead iodide perovskite (MAPbI<jats:sub>3</jats:sub>) is renowned for an impressive power conversion efficiency rise and cost-effective fabrication for photovoltaics. In this work, we demonstrate that polycrystalline MAPbI<jats:sub>3</jats:sub>s undergo drastic changes in optical properties at moderate field strengths with an ultrafast response time, via transient Wannier Stark localization. The distinct band structure of this material - the large lattice periodicity, the narrow electronic energy bandwidths, and the coincidence of these two along the same high-symmetry direction – enables relatively weak fields to bring this material into the Wannier Stark regime. Its polycrystalline nature is not detrimental to the optical switching performance of the material, since the least dispersive direction of the band structure dominates the contribution to the optical response, which favors low-cost fabrication. Together with the outstanding photophysical properties of MAPbI<jats:sub>3</jats:sub>, this finding highlights the great potential of this material in ultrafast light modulation and novel photonic applications.</jats:p> Springer Science and Business Media LLC2021 eng General Physics and AstronomyGeneral BiochemistryGenetics and Molecular BiologyGeneral ChemistryMultidisciplinary 2041-172310.1038/s41467-021-26021-4 121 Berghoff, D., Bühler, J., Bonn, M., Leitenstorfer, A., Meier, T., &#38; Kim, H. (2021). Low-field onset of Wannier-Stark localization in a polycrystalline hybrid organic inorganic perovskite. <i>Nature Communications</i>, <i>12</i>(1), Article 5719. <a href="https://doi.org/10.1038/s41467-021-26021-4">https://doi.org/10.1038/s41467-021-26021-4</a> Berghoff, Daniel, et al. “Low-Field Onset of Wannier-Stark Localization in a Polycrystalline Hybrid Organic Inorganic Perovskite.” <i>Nature Communications</i>, vol. 12, no. 1, 5719, Springer Science and Business Media LLC, 2021, doi:<a href="https://doi.org/10.1038/s41467-021-26021-4">10.1038/s41467-021-26021-4</a>. @article{Berghoff_Bühler_Bonn_Leitenstorfer_Meier_Kim_2021, title={Low-field onset of Wannier-Stark localization in a polycrystalline hybrid organic inorganic perovskite}, volume={12}, DOI={<a href="https://doi.org/10.1038/s41467-021-26021-4">10.1038/s41467-021-26021-4</a>}, number={15719}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Berghoff, Daniel and Bühler, Johannes and Bonn, Mischa and Leitenstorfer, Alfred and Meier, Torsten and Kim, Heejae}, year={2021} } D. Berghoff, J. Bühler, M. Bonn, A. Leitenstorfer, T. Meier, H. Kim, Nature Communications 12 (2021). Berghoff D, Bühler J, Bonn M, Leitenstorfer A, Meier T, Kim H. Low-field onset of Wannier-Stark localization in a polycrystalline hybrid organic inorganic perovskite. <i>Nature Communications</i>. 2021;12(1). doi:<a href="https://doi.org/10.1038/s41467-021-26021-4">10.1038/s41467-021-26021-4</a> Berghoff, Daniel, Johannes Bühler, Mischa Bonn, Alfred Leitenstorfer, Torsten Meier, and Heejae Kim. “Low-Field Onset of Wannier-Stark Localization in a Polycrystalline Hybrid Organic Inorganic Perovskite.” <i>Nature Communications</i> 12, no. 1 (2021). <a href="https://doi.org/10.1038/s41467-021-26021-4">https://doi.org/10.1038/s41467-021-26021-4</a>. D. Berghoff, J. Bühler, M. Bonn, A. Leitenstorfer, T. Meier, and H. Kim, “Low-field onset of Wannier-Stark localization in a polycrystalline hybrid organic inorganic perovskite,” <i>Nature Communications</i>, vol. 12, no. 1, Art. no. 5719, 2021, doi: <a href="https://doi.org/10.1038/s41467-021-26021-4">10.1038/s41467-021-26021-4</a>. 373382023-01-18T11:47:55Z2023-04-21T11:14:19Z