Revealing Diverse Degradation Pathways in Lead Halide Perovskite Solar Cells

Azat Akbulatov^a, Olga Yamilova^b^,^a, Mohamed Elnaggar^a^,^b^,^c, Alexandra Boldyreva^b, Moneim Elshobaki^b, Sergey Tsarev^b, Lyubov Frolova^b^,^a, Keith Stevenson^b, Pavel Troshin^b^,^a

^aThe Institute for Problems of Chemical Physics of the Russian Academy of Sciences RAS, Russia, Semenov Prospect 1, Russian Federation

^bSkolkovo Institute of Science and Technology, Skolkovo Innovation Center, Nobel st. 3, Moscow, Russian Federation

^cMoscow Institute of Physics and Technology (MIPT), Moscow, Russia, Institutskiy Pereulok, 9, Dolgoprudny, Russian Federation

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)

Roma, Italy, 2020 May 12th - 14th

Organizers: Prashant Kamat, Filippo De Angelis and Aldo Di Carlo

Invited Speaker Session, Pavel Troshin, presentation 059
DOI: https://doi.org/10.29363/nanoge.hopv.2020.059
Publication date: 6th February 2020

The emerging perovskite solar cells demonstrated impressive power conversion efficiencies exceeding 23%, while their practical application is restricted mainly by poor operation stability. We have reported recently that hybrid MAPbX₃ perovskites undergo facile thermal and photochemical degradation even under anoxic conditions without exposure to oxygen and moisture, while their all-inorganic counterparts CsPbX₃ proved to be significantly more stable.

Here we will discuss our the most recent results coming from a systematic study of the intrinsic stability of a broad range of materials represented by various lead-based perovskites as well as lead-free complex halides of tin, germanium, bismuth and antimony. The revealed pathways of thermal, photochemical and electrochemical degradation processes will be presented and a conclusion on the potential of different groups of materials for practical application in PV technology will be drawn.

We will also analyze the interface degradation effects occurring between the electrodes, charge transport layer materials and the photoactive layer induced by electric field, elevated temperatures, solar light or a combination of these stress factors. Finally, it will be shown that reaching any commercially interesting operation lifetimes for perovskite solar cells requires a considerable shift from the currently used device design paradigms as well as a comprehensive multiparametric optimization of all used materials and functional components.

Acknowledgements:

This work was supported by Russian Science Foundation (project 18-13-00353).

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International Conference on Hybrid and Organic Photovoltaics

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