How humidity and light exposure change the photophysics of metal halide perovskite solar cells

0537871 - FZÚ 2021 RIV DE eng J - Článek v odborném periodiku
Ugur, E. - Alarousu, E. - Khan, J.I. - Vlk, Aleš - Aydin, E. - De Bastiani, M. - Balawi, A.H. - Gonzalez Lopez, S.P. - Ledinský, Martin - De Wolf, S. - Laquai, F.
How humidity and light exposure change the photophysics of metal halide perovskite solar cells.
Solar RRL. Roč. 4, č. 11 (2020), s. 1-10, č. článku 2000382. ISSN 2367-198X. E-ISSN 2367-198X
Grant CEP: GA MŠMT LM2018110; GA MŠMT(CZ) EF16_019/0000760; GA ČR GJ17-26041Y
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271
Klíčová slova: cells photodegradation * metal halide perovskites * perovskite photophysics
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 8.582, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1002/solr.202000382

Metal halide perovskites exhibit outstanding optical and electronic properties but are very sensitive to humidity and light-soaking. In this work, the photophysics of perovskites that have been exposed to such conditions are studied and the impact of excess lead iodide is revealed. For exposed samples, the formation of sub-bandgap states and increased trap assisted recombination is observed, using highly sensitive absorption and time-resolved photoluminescence measurements, respectively. It appears that such exposure primarily affects the perovskite surface. Consequently, on n–i–p device level, the spiro-OMeTAD/perovskite interface is more rapidly affected than its buried electron-collecting interface. Moreover, both stoichiometric and nonstoichiometric MAPbI3-based solar cells show reduced device performance mainly due to voltage losses. Overall, this study brings forward key points to consider in engineering perovskite solar cells with improved performance and material stability.

Trvalý link: http://hdl.handle.net/11104/0315701