Defect Engineering, Advanced Modelling and Characterization for Next Generation Opto-Electronic-Ionic Devices

Project Information

OptEIon

Grant agreement ID: 851676

DOI

10.3030/851676

Project closed

EC signature date 11 September 2019

Start date 1 June 2020

End date 31 May 2026

Funded under

• EXCELLENT SCIENCE - European Research Council (ERC)

Total cost

€ 1 980 735,00

EU contribution

€ 1 980 735,00

Coordinated by

ZURCHER HOCHSCHULE FUR ANGEWANDTE WISSENSCHAFTEN
Switzerland

CORDIS provides links to public deliverables and publications of HORIZON projects.

Links to deliverables and publications from FP7 projects, as well as links to some specific result types such as dataset and software, are dynamically retrieved from OpenAIRE .

Publications

Peer reviewed articles (27)

Autoencoder for parameter estimation and current-voltage curve simulation of perovskite solar cells

Author(s): Oliver Zbinden, Ennio Luigi Comi, Evelyne Knapp, Wolfgang Tress
Published in: npj Computational Materials, Issue 12, 2026, ISSN 2057-3960
Publisher: Springer Science and Business Media LLC
DOI: 10.1038/s41524-025-01875-0

A Transparent Electrode Based on Solution-Processed ZnO for Organic Optoelectronic Devices

Author(s): Zhi Chen, Jie Wang, Hongbo Wu, Jianming Yang, Yikai Wang, Jing Zhang, Qinye Bao, MingWang, Zaifei Ma, Wolfgang Tress, Zheng Tang
Published in: Nature Communications, Issue 13, 2022, Page(s) 4387, ISSN 2041-1723
Publisher: Nature Publishing Group
DOI: 10.1038/s41467-022-32010-y

Ion Migration in Mesoscopic Perovskite Solar Cells: Effects on Electroluminescence, Open Circuit Voltage, and Photovoltaic Quantum Efficiency

Author(s): Miguel A. Torre Cachafeiro, Ennio Luigi Comi, Sharun Parayil Shaji, Stéphanie Narbey, Sandra Jenatsch, Evelyne Knapp, Wolfgang Tress
Published in: Advanced Energy Materials, 2025, ISSN 1614-6832
Publisher: Wiley-VCH Verlag
DOI: 10.1002/aenm.202403850

Mobile ions determine the luminescence yield of perovskite light-emitting diodes under pulsed operation.

Author(s): Kumawat, Naresh Kumar; Tress, Wolfgang; Gao, Feng
Published in: Nature Communications, 2021, ISSN 2041-1723
Publisher: Nature Publishing Group
DOI: 10.1038/s41467-021-25016-5

Mechanistic Insights into Ionic Conduction in Lead Halide Perovskites and Perovskite‐Inspired Materials

Author(s): Ramesh Kumar, Bhavya Rakheja, Noora Lamminen, Francesca Fasulo, Miguel Angel Torre Cachafeiro, Chintam Hanmandlu, G. Krishnamurthy Grandhi, Monojit Bag, Ana Belén Muñoz‐García, Gerrit Boschloo, Wolfgang Tress, Michele Pavone, Paola Vivo, Erik M. J. Johansson
Published in: Advanced Energy Materials, Issue 15, 2025, ISSN 1614-6832
Publisher: Wiley-VCH Verlag
DOI: 10.1002/aenm.202503331

Elucidating the origin of open‐circuit voltage in ternary organic solar cells with a nonfullerene and a fullerene acceptor

Author(s): Dominic Blätte, Marcella Günther, Carlito S. Ponseca, Andreas Weis, Rik Hooijer, Lucie Quincke, Miguel A. T. Cachafeiro, Wolfgang Tress, Jose D. Perea, Salvador Leon, Ali Shuaib, Pavel Chabera, Tönu Pullerits, Thomas Bein, Tayebeh Ameri
Published in: InfoMat, Issue 8, 2026, ISSN 2567-3165
Publisher: Wiley
DOI: 10.1002/inf2.70109

Impact of donor halogenation on reorganization energies and voltage losses in bulk-heterojunction solar cells

Author(s): Hongbo Wu; Zaifei Ma; Mengyang Li; Hao Lu; Ailing Tang; Erjun Zhou; Jin Wen; Yanming Sun; Wolfgang Tress; Jógvan Magnus Haugaard Olsen; Simone Meloni; Zhishan Bo; Zheng Tang
Published in: Energy Environ. Sci., Issue 16, 2023, Page(s) 1277-1290, ISSN 1754-5706
Publisher: Royal Society of Chemistry
DOI: 10.1039/d3ee00174a

Visualising ionic screening in perovskite solar cells: a bumpy ride along the <i>J</i> – <i>V</i> curve

Author(s): Miguel A. Torre Cachafeiro, Stéphanie Narbey, Beat Ruhstaller, Frank Nüesch, Wolfgang Tress
Published in: EES Solar, Issue 1, 2026, Page(s) 762-774, ISSN 3033-4063
Publisher: Royal Society of Chemistry (RSC)
DOI: 10.1039/d5el00133a

Integrated memristor for mitigating reverse-bias in perovskite solar cells

Author(s): Mahdi Mohammadi, Fuxiang Ji, Tristan Sachsenweger, Kazem Meraji, Sharun Parayil Shaji, Wolfgang Tress
Published in: Nature, Issue 651, 2026, Page(s) 933-939, ISSN 0028-0836
Publisher: Nature Publishing Group
DOI: 10.1038/s41586-026-10275-3

Effects of Tail States in Cs₂AgBiBr₆ Double Perovskites on Solar Cell Performance: A Temperature‐Dependent Study of Photovoltaic External Quantum Efficiency, Open‐Circuit Voltage, and Luminescence

Author(s): Firouzeh Ebadi, Kazem Meraji, Miguel A. Torre Cachafeiro, Florian Wolf, Maximillian T. Sirtl, Thomas Bein, Wolfgang Tress
Published in: Advanced Energy Materials, Issue 15, 2025, ISSN 1614-6832
Publisher: Wiley-VCH Verlag
DOI: 10.1002/aenm.202500758

Decreasing exciton dissociation rates for reduced voltage losses in organic solar cells

Author(s): Hongbo Wu, Hao Lu, Yungui Li, Xin Zhou, Guanqing Zhou, Hailin Pan, Hanyu Wu, Xunda Feng, Feng Liu, Koen Vandewal, Wolfgang Tress, Zaifei Ma, Zhishan Bo, Zheng Tang
Published in: Nature Communications, Issue 15, 2024, ISSN 2041-1723
Publisher: Nature Publishing Group
DOI: 10.1038/s41467-024-46797-5

Assessing the Influence of Illumination on Ion Conductivity in Perovskite Solar Cells

Author(s): Andreas Schiller, Sandra Jenatsch, Balthasar Blülle, Miguel Angel Torre Cachafeiro, Firouzeh Ebadi, Nasim Kabir, Mostafa Othman, Christian Michael Wolff, Aïcha Hessler-Wyser, Christophe Ballif, Wolfgang Tress, Beat Ruhstaller
Published in: The Journal of Physical Chemistry Letters, Issue 15, 2024, Page(s) 11252-11258, ISSN 1948-7185
Publisher: American Chemical Society
DOI: 10.1021/acs.jpclett.4c02403

Simultaneous optimization of film morphology and structure dimensionality in Cs3Sb2I9 through butylamine gas treatment

Author(s): Fuxiang Ji, Tristan Sachsenweger Ballantyne, Kazem Meraji, Sharun Parayil Shaji, Laura Nicolette Schusser, Sandile Kumalo, Wolfgang Tress
Published in: Communications Materials, 2026, ISSN 2662-4443
Publisher: Springer Science and Business Media LLC
DOI: 10.1038/s43246-026-01240-8

Ionic Losses and Gains in Perovskite Solar Cells: Impact on Efficiency and Stability

Author(s): Miguel A. Torre Cachafeiro, Wolfgang Tress
Published in: ACS Energy Letters, Issue 10, 2025, Page(s) 4849-4855, ISSN 2380-8195
Publisher: American Chemical Society (ACS)
DOI: 10.1021/acsenergylett.5c02435

Formation and switching mechanism in high-performance perovskite memristors with ultra-wide dynamic range

Author(s): Mahdi Mohammadi, Tristan Sachsenweger, Ennio L. Comi, Fuxiang Ji, Sebastian Lohde, Miguel A. Torre Cachafeiro, Amit K. Sachan, Kurt P. Pernstich, Evelyne Knapp, Wolfgang Tress
Published in: Joule, 2026, Page(s) 102473, ISSN 2542-4351
Publisher: Elsevier BV
DOI: 10.1016/j.joule.2026.102473

ChargeFabrica: a python-based finite difference multidimensional electro-ionic drift diffusion simulator applied to mesoporous perovskite solar cells

Author(s): Tristan Sachsenweger, Miguel A Torre Cachafeiro, Wolfgang Tress
Published in: Materials Futures, Issue 5, 2026, Page(s) 025602, ISSN 2752-5724
Publisher: IOP Publishing
DOI: 10.1088/2752-5724/ae27e9

Photochromic Control in Hybrid Perovskite Photovoltaics

Author(s): Weifan Luo, José María Andrés Castán, Diego Mirani, Antonio J. Riquelme, Amit Kumar Sachan, Olzhas Kurman, SunJu Kim, Fabiola Faini, Paul Zimmermann, Alexander Hinderhofer, Yash Patel, Aaron T. Frei, Jacques‐E. Moser, Daniel Ramirez, Frank Schreiber, Pascale Maldivi, Ji‐Youn Seo, Wolfgang Tress, Giulia Grancini, Renaud Demadrille, Jovana V. Milić
Published in: Advanced Materials, Issue 37, 2025, ISSN 0935-9648
Publisher: United Nations Industrial Developement Organization
DOI: 10.1002/adma.202420143

2D/3D Hybrid Cs2AgBiBr6 Double Perovskite Solar Cells: Improved Energy Level Alignment for Higher Contact-Selectivity and Large Open Circuit Voltage

Author(s): Maximilian T. Sirtl, Rik Hooijer, Melina Armer, Firouzeh G. Ebadi, Mahdi Mohammadi, Clément Maheu, Andreas Weis, Bas T. van Gorkom, Sebastian Häringer, René A. J. Janssen, Thomas Mayer, Vladimir Dyakonov, Wolfgang Tress, Thomas Bein
Published in: Advanced Energy Materials, 2022, Page(s) 2103215, ISSN 1614-6840
Publisher: Wiley Online Library
DOI: 10.1002/aenm.202103215

Identifying Performance Limiting Parameters in Perovskite Solar Cells Using Machine Learning

Author(s): Oliver Zbinden, Evelyne Knapp, Wolfgang Tress
Published in: Solar RRL, Issue 8, 2024, ISSN 2367-198X
Publisher: Wiley
DOI: 10.1002/solr.202300999

Cs2AgBiBr6 Double perovskites as lead‐free alternatives for perovskite solar cells?

Author(s): Tress, Wolfgang; Sirtl, Maximilian T.
Published in: Solar RRL, 2021, ISSN 2367-198X
Publisher: Wiley
DOI: 10.1002/solr.202100770

The bottlenecks of Cs2AgBiBr6 solar cells : how contacts and slow transients limit the performance

Author(s): Sirtl, Maximilian T., Firouzeh Ebadi, van Gorkom, Bas T.; Ganswindt, Patrick; Janssen, René A. J.; Bein, Thomas; Tress, Wolfgang
Published in: Advanced Optical Materials, 2021, ISSN 2195-1071
Publisher: Wiley
DOI: 10.1002/adom.202100202

Roadmap on commercialization of metal halide perovskite photovoltaics

Author(s): Firouzeh Ebadi, Wolfgang Tress
Published in: J. Phys. Mater., 2023, ISSN 2515-7639
Publisher: IOP
DOI: 10.1088/2515-7639/acc893

Data-driven analysis of hysteresis and stability in perovskite solar cells using machine learning

Author(s): Sharun Parayil Shaji, Wolfgang Tress
Published in: Energy and AI, Issue 20, 2025, Page(s) 100503, ISSN 2666-5468
Publisher: Elsevier BV
DOI: 10.1016/j.egyai.2025.100503

Pulsed operation of perovskite LEDs: a study on the role of mobile ions

Author(s): Miguel A Torre Cachafeiro, Naresh Kumar Kumawat, Feng Gao, Wolfgang Tress
Published in: National Science Review, 2024, ISSN 2095-5138
Publisher: Oxford University Press
DOI: 10.1093/nsr/nwae128

Suppression of Stacking Faults for Stable Formamidinium‐Rich Perovskite Absorbers

Author(s): Mostafa Othman, Lorenzo Agosta, Quentin Jeangros, Anaël Jaffrès, Sandra Jenatsch, Virginia Carnevali, Nikolaos Lempesis, Vladislav Slama, Julian A. Steele, Rui Zhang, Eduardo Solano, Guiseppe Portale, Victor Boureau, Adriana Paracchino, Aurélien Bornet, Huagui Lai, Fan Fu, Amit Kumar Sachan, Wolfgang Tress, Kerem Artuk, Mounir D. Mensi, Mohammad Reza Golobostanfard, Austin G. Kuba, Stefan Zeisk
Published in: Advanced Materials, Issue 37, 2026, ISSN 0935-9648
Publisher: United Nations Industrial Developement Organization
DOI: 10.1002/adma.202502142

Inverted <i>J</i> – <i>V</i> Hysteresis in Perovskite Solar Cells: Insights from Photovoltaic Quantum Efficiency

Author(s): Miguel Torre Cachafeiro, Carys A. Worsley, Fuxiang Ji, Trystan M. Watson, Wolfgang Tress
Published in: ACS Energy Letters, Issue 11, 2026, Page(s) 2173-2178, ISSN 2380-8195
Publisher: American Chemical Society (ACS)
DOI: 10.1021/acsenergylett.5c04035

When photoluminescence, electroluminescence, and open-circuit voltage diverge : light soaking and halide segregation in perovskite solar cells

Author(s): Firouzeh Ebadi; Bowen Yang; YeonJu Kim; Raheleh Mohammadpour; Nima Taghavinia; Anders Hagfeldt; Wolfgang Tress
Published in: Journal of Materials Chemistry A, 2021, ISSN 2050-7488
Publisher: Royal Society of Chemistry
DOI: 10.1039/d1ta02878b