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Reduction of Methylammonium Cations as a Major Electrochemical Degradation Pathway in MAPbI3 Perovskite Solar Cellsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 17 июля 2020 г.
- Авторы: Yamilova Olga R., Danilov Andrei V., Mangrulkar Mayuribala, Fedotov Yuri S., Luchkin Sergey Yu, Babenko Sergey D., Bredikhin Sergey I., Aldoshin Sergey M., Stevenson Keith J., Troshin Pavel A.
- Журнал: Journal of Physical Chemistry Letters
- Том: 11
- Номер: 1
- Год издания: 2019
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 221
- Последняя страница: 228
- DOI: 10.1021/acs.jpclett.9b03161
- Аннотация: Herein, we reveal for the first time a comprehensive mechanism of poorly investigated electrochemical decomposition of CH3NH3PbI3 using a set of microscopy techniques (optical, AFM, PL) and ToF-SIMS. We demonstrate that applied electric bias induces the oxidation of I- to I-2, which remains trapped in the film in the form of polyiodides, and hence, the process can be conceivably reversed by reduction. On the contrary, reduction of organic methylammonium cation produces volatile products, which leave the film and thus make the degradation irreversible. Our results lead to a paradigm change when considering design principles for improving the stability of complex lead halide materials as those featuring organic cations rather than halide anions as the most electric field-sensitive components. Suppressing the electrochemical degradation of complex lead halides represents a crucial challenge, which should be addressed in order to bring the operational stability of perovskite photovoltaics to commercially interesting benchmarks.
- Добавил в систему: Алдошин Сергей Михайлович