---
_id: '65270'
abstract:
- lang: eng
text: 'In perovskite solar cells (PSCs), electron transport layers (ETLs) play an
important role in the selection and transport of electrons. Understanding the
properties of these layers in relation to device performance is essential for
optimizing solar cell efficiency and enabling their integration into emerging
architectures, such as flexible solar cells. Here, we deposited TiO2 at different
thicknesses using atomic layer deposition (ALD), a technique well-suited for producing
uniform and pinhole-free films. The crystal structure of the layers was controlled
by depositing the films at three different temperatures: 150 °C, 250 °C, and 350
°C. The layers were characterized in detail to determine the morphology (by atomic
force microscopy), surface composition (by X-ray photoelectron spectroscopy) and
the crystal structure (by X-ray diffraction). The TiO2 layers were then incorporated
as ETLs in planar perovskite solar cells to evaluate their influence on device
performance. Higher deposition temperatures led to improvements in device fill
factor and open-circuit voltage, leading to more efficient solar cells. Notably,
the best device performance for the ALD-TiO2 layers was achieved with films deposited
at 250 °C.'
article_type: original
author:
- first_name: Syeda
full_name: Qudsia, Syeda
last_name: Qudsia
- first_name: Alexander
full_name: Weiss, Alexander
last_name: Weiss
- first_name: Saara
full_name: Sirkiä, Saara
last_name: Sirkiä
- first_name: Fuzeng
full_name: Wang, Fuzeng
last_name: Wang
- first_name: Emil
full_name: Rosqvist, Emil
last_name: Rosqvist
- first_name: Teresa De
full_name: Los Arcos, Teresa De
last_name: Los Arcos
- first_name: Christian
full_name: Weinberger, Christian
id: '11848'
last_name: Weinberger
- first_name: Janne
full_name: Halme, Janne
last_name: Halme
- first_name: Marianna
full_name: Kemell, Marianna
last_name: Kemell
- first_name: Jan-Henrik
full_name: Smått, Jan-Henrik
last_name: Smått
citation:
ama: Qudsia S, Weiss A, Sirkiä S, et al. Influence of deposition temperature and
thickness of ALD-TiO2 on planar perovskite solar cell performance. Applied
Surface Science. Published online 2026:166755. doi:https://doi.org/10.1016/j.apsusc.2026.166755
apa: Qudsia, S., Weiss, A., Sirkiä, S., Wang, F., Rosqvist, E., Los Arcos, T. D.,
Weinberger, C., Halme, J., Kemell, M., & Smått, J.-H. (2026). Influence of
deposition temperature and thickness of ALD-TiO2 on planar perovskite solar cell
performance. Applied Surface Science, 166755. https://doi.org/10.1016/j.apsusc.2026.166755
bibtex: '@article{Qudsia_Weiss_Sirkiä_Wang_Rosqvist_Los Arcos_Weinberger_Halme_Kemell_Smått_2026,
title={Influence of deposition temperature and thickness of ALD-TiO2 on planar
perovskite solar cell performance}, DOI={https://doi.org/10.1016/j.apsusc.2026.166755},
journal={Applied Surface Science}, author={Qudsia, Syeda and Weiss, Alexander
and Sirkiä, Saara and Wang, Fuzeng and Rosqvist, Emil and Los Arcos, Teresa De
and Weinberger, Christian and Halme, Janne and Kemell, Marianna and Smått, Jan-Henrik},
year={2026}, pages={166755} }'
chicago: Qudsia, Syeda, Alexander Weiss, Saara Sirkiä, Fuzeng Wang, Emil Rosqvist,
Teresa De Los Arcos, Christian Weinberger, Janne Halme, Marianna Kemell, and Jan-Henrik
Smått. “Influence of Deposition Temperature and Thickness of ALD-TiO2 on Planar
Perovskite Solar Cell Performance.” Applied Surface Science, 2026, 166755.
https://doi.org/10.1016/j.apsusc.2026.166755.
ieee: 'S. Qudsia et al., “Influence of deposition temperature and thickness
of ALD-TiO2 on planar perovskite solar cell performance,” Applied Surface Science,
p. 166755, 2026, doi: https://doi.org/10.1016/j.apsusc.2026.166755.'
mla: Qudsia, Syeda, et al. “Influence of Deposition Temperature and Thickness of
ALD-TiO2 on Planar Perovskite Solar Cell Performance.” Applied Surface Science,
2026, p. 166755, doi:https://doi.org/10.1016/j.apsusc.2026.166755.
short: S. Qudsia, A. Weiss, S. Sirkiä, F. Wang, E. Rosqvist, T.D. Los Arcos, C.
Weinberger, J. Halme, M. Kemell, J.-H. Smått, Applied Surface Science (2026) 166755.
date_created: 2026-04-01T08:39:55Z
date_updated: 2026-04-07T13:37:22Z
doi: https://doi.org/10.1016/j.apsusc.2026.166755
keyword:
- Titanium dioxide
- Atomic layer deposition
- Electron transport layer
- Perovskite solar cells
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.sciencedirect.com/science/article/pii/S0169433226009591?via%3Dihub
oa: '1'
page: '166755'
publication: Applied Surface Science
publication_identifier:
issn:
- 0169-4332
status: public
title: Influence of deposition temperature and thickness of ALD-TiO2 on planar perovskite
solar cell performance
type: journal_article
user_id: '11848'
year: '2026'
...
---
_id: '9991'
abstract:
- lang: eng
text: Abstract:Since fine powders tend strongly to adhesion and agglomeration, their
processing withconventional methods is difficult or impossible. Typically, in order
to enable the handling of finepowders, chemicals are added to increase the flowability
and reduce adhesion. This contributionshows that instead of additives also vibrations
can be used to increase the flowability, to reduceadhesion and cohesion, and thus
to enable or improve processes such as precision dosing, mixing,and transport
of very fine powders. The methods for manipulating powder properties are describedin
detail and prototypes for experimental studies are presented. It is shown that
the handling of finepowders can be improved by using low-frequency, high-frequency
or a combination of low- andhigh-frequency vibration.
author:
- first_name: Paul
full_name: Dunst, Paul
id: '22130'
last_name: Dunst
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: Dunst P, Bornmann P, Hemsel T, Sextro W. Vibration-Assisted Handling of Dry
Fine Powders. Actuators 2018, 7(2). 2018:1-11. doi:10.3390/act7020018
apa: Dunst, P., Bornmann, P., Hemsel, T., & Sextro, W. (2018). Vibration-Assisted
Handling of Dry Fine Powders. Actuators 2018, 7(2)., 1–11. https://doi.org/10.3390/act7020018
bibtex: '@article{Dunst_Bornmann_Hemsel_Sextro_2018, title={Vibration-Assisted Handling
of Dry Fine Powders}, DOI={10.3390/act7020018},
journal={Actuators 2018, 7(2).}, author={Dunst, Paul and Bornmann, Peter and Hemsel,
Tobias and Sextro, Walter}, year={2018}, pages={1–11} }'
chicago: Dunst, Paul, Peter Bornmann, Tobias Hemsel, and Walter Sextro. “Vibration-Assisted
Handling of Dry Fine Powders.” Actuators 2018, 7(2)., 2018, 1–11. https://doi.org/10.3390/act7020018.
ieee: P. Dunst, P. Bornmann, T. Hemsel, and W. Sextro, “Vibration-Assisted Handling
of Dry Fine Powders,” Actuators 2018, 7(2)., pp. 1–11, 2018.
mla: Dunst, Paul, et al. “Vibration-Assisted Handling of Dry Fine Powders.” Actuators
2018, 7(2)., 2018, pp. 1–11, doi:10.3390/act7020018.
short: P. Dunst, P. Bornmann, T. Hemsel, W. Sextro, Actuators 2018, 7(2). (2018)
1–11.
date_created: 2019-05-27T10:16:16Z
date_updated: 2019-09-16T09:44:54Z
department:
- _id: '151'
doi: 10.3390/act7020018
keyword:
- powder handling
- flowability
- dosing
- transport
- mixing
- dispersion
- piezoelectricactuators
- vibrations
language:
- iso: eng
page: 1-11
publication: Actuators 2018, 7(2).
quality_controlled: '1'
status: public
title: Vibration-Assisted Handling of Dry Fine Powders
type: journal_article
user_id: '55222'
year: '2018'
...
---
_id: '9972'
abstract:
- lang: eng
text: The transportation of dry fine powders is an emerging technologic task, as
in biotechnology, pharmaceu-tical and coatings industry the particle sizes of
processed powders get smaller and smaller. Fine powdersare primarily defined by
the fact that adhesive and cohesive forces outweigh the weight forces, leadingto
mostly unwanted agglomeration (clumping) and adhesion to surfaces. Thereby it
gets more difficult touse conventional conveyor systems (e.g. pneumatic or vibratory
conveyors) for transport. A rather newmethod for transporting these fine powders
is based on ultrasonic vibrations, which are used to reducefriction between powder
and substrate. Within this contribution an experimental set-up consisting of apipe,
a solenoid actuator for axial vibration and an annular piezoelectric actuator
for the high frequencyradial vibration of the pipe is described. Since amplitudes
of the radial pipe vibration should be as large aspossible to get high effects
of friction reduction, the pipe is excited to vibrate in resonance. To determinethe
optimum excitation frequency and actuator position the vibration modes and resonance
frequenciesof the pipe are calculated and measured. Results are in good accordance.
author:
- first_name: Paul
full_name: Dunst, Paul
id: '22130'
last_name: Dunst
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: Dunst P, Hemsel T, Sextro W. Analysis of pipe vibration in an ultrasonic powder
transportationsystem. elsevier. 2017;Sensors and Actuators A 263:733-736.
apa: Dunst, P., Hemsel, T., & Sextro, W. (2017). Analysis of pipe vibration
in an ultrasonic powder transportationsystem. Elsevier, Sensors and
Actuators A 263, 733–736.
bibtex: '@article{Dunst_Hemsel_Sextro_2017, title={Analysis of pipe vibration in
an ultrasonic powder transportationsystem}, volume={Sensors and Actuators A 263},
journal={elsevier}, author={Dunst, Paul and Hemsel, Tobias and Sextro, Walter},
year={2017}, pages={733–736} }'
chicago: 'Dunst, Paul, Tobias Hemsel, and Walter Sextro. “Analysis of Pipe Vibration
in an Ultrasonic Powder Transportationsystem.” Elsevier Sensors and Actuators
A 263 (2017): 733–36.'
ieee: P. Dunst, T. Hemsel, and W. Sextro, “Analysis of pipe vibration in an ultrasonic
powder transportationsystem,” elsevier, vol. Sensors and Actuators A 263,
pp. 733–736, 2017.
mla: Dunst, Paul, et al. “Analysis of Pipe Vibration in an Ultrasonic Powder Transportationsystem.”
Elsevier, vol. Sensors and Actuators A 263, 2017, pp. 733–36.
short: P. Dunst, T. Hemsel, W. Sextro, Elsevier Sensors and Actuators A 263 (2017)
733–736.
date_created: 2019-05-27T09:31:13Z
date_updated: 2019-09-16T10:23:40Z
department:
- _id: '151'
keyword:
- Powder transport Piezoelectrics Ultrasonics Pipe vibration Finite element simulation
Fine powder
language:
- iso: eng
page: 733-736
publication: elsevier
quality_controlled: '1'
status: public
title: Analysis of pipe vibration in an ultrasonic powder transportationsystem
type: journal_article
user_id: '55222'
volume: Sensors and Actuators A 263
year: '2017'
...
---
_id: '39071'
abstract:
- lang: eng
text: The interconnection of software components is a key to enabling collaborative
work. However, technology differences and security barriers like firewalls often
hinder establishing collaborative infrastructures between enterprises or even
within a single enterprise. We introduce a peer-to-peer based network infrastructure
that transparently overcomes these problems using relay and routing mechanisms
as well as different underlying transport protocols. We discuss the application
of this technology to interconnect Web services.
author:
- first_name: Tim
full_name: Schattkowsky, Tim
last_name: Schattkowsky
- first_name: Chris
full_name: Loeser, Chris
last_name: Loeser
- first_name: Wolfgang
full_name: Müller, Wolfgang
id: '16243'
last_name: Müller
citation:
ama: 'Schattkowsky T, Loeser C, Müller W. Peer-To-Peer Technology for Interconnecting
Web Services in Heterogeneous Networks. In: Proceedings of AINA2004. IEEE;
2004. doi:10.1109/AINA.2004.1283977'
apa: Schattkowsky, T., Loeser, C., & Müller, W. (2004). Peer-To-Peer Technology
for Interconnecting Web Services in Heterogeneous Networks. Proceedings of
AINA2004. 18th International Conference on Advanced Information Networking
and Applications, Fukuoka, Japan . https://doi.org/10.1109/AINA.2004.1283977
bibtex: '@inproceedings{Schattkowsky_Loeser_Müller_2004, place={Fukuoka, Japan },
title={Peer-To-Peer Technology for Interconnecting Web Services in Heterogeneous
Networks}, DOI={10.1109/AINA.2004.1283977},
booktitle={Proceedings of AINA2004}, publisher={IEEE}, author={Schattkowsky, Tim
and Loeser, Chris and Müller, Wolfgang}, year={2004} }'
chicago: 'Schattkowsky, Tim, Chris Loeser, and Wolfgang Müller. “Peer-To-Peer Technology
for Interconnecting Web Services in Heterogeneous Networks.” In Proceedings
of AINA2004. Fukuoka, Japan : IEEE, 2004. https://doi.org/10.1109/AINA.2004.1283977.'
ieee: 'T. Schattkowsky, C. Loeser, and W. Müller, “Peer-To-Peer Technology for Interconnecting
Web Services in Heterogeneous Networks,” presented at the 18th International
Conference on Advanced Information Networking and Applications, Fukuoka, Japan
, 2004, doi: 10.1109/AINA.2004.1283977.'
mla: Schattkowsky, Tim, et al. “Peer-To-Peer Technology for Interconnecting Web
Services in Heterogeneous Networks.” Proceedings of AINA2004, IEEE, 2004,
doi:10.1109/AINA.2004.1283977.
short: 'T. Schattkowsky, C. Loeser, W. Müller, in: Proceedings of AINA2004, IEEE,
Fukuoka, Japan , 2004.'
conference:
location: 'Fukuoka, Japan '
name: ' 18th International Conference on Advanced Information Networking and Applications'
date_created: 2023-01-24T09:05:58Z
date_updated: 2023-01-24T09:06:02Z
department:
- _id: '672'
doi: 10.1109/AINA.2004.1283977
keyword:
- Peer to peer computing
- Web services
- Intelligent networks
- Routing
- Relays
- Simple object access protocol
- Collaborative work
- Transport protocols
- Network address translation
- Java
language:
- iso: eng
place: 'Fukuoka, Japan '
publication: Proceedings of AINA2004
publication_identifier:
isbn:
- 0-7695-2051-0
publisher: IEEE
status: public
title: Peer-To-Peer Technology for Interconnecting Web Services in Heterogeneous Networks
type: conference
user_id: '5786'
year: '2004'
...