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Organohalide Lead Perovskites: More Stable than Glass under Gamma‐Ray Radiation
Author(s) -
Yang Shuang,
Xu Zeyuan,
Xue Sha,
Kandlakunta Praneeth,
Cao Lei,
Huang Jinsong
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201805547
Subject(s) - perovskite (structure) , materials science , irradiation , gamma ray , optoelectronics , radiation , energy conversion efficiency , semiconductor , radiochemistry , optics , chemical engineering , physics , chemistry , nuclear physics , engineering
Organohalide metal perovskites have emerged as promising semiconductor materials for use as space solar cells and radiation detectors. However, there is a lack of study of their stability under operational conditions. Here a stability study of perovskite solar cells under gamma‐rays and visible light simultaneously is reported. The perovskite active layers are shown to retain 96.8% of their initial power conversion efficiency under continuous irradiation of gamma‐rays and light for 1535 h, where gamma‐rays have an accumulated dose of 2.3 Mrad. In striking contrast, a glass substrate shows obvious loss of transmittance under the same irradiation conditions. The excellent stability of the perovskite solar cells benefits from the self‐healing behavior to recover its efficiency loss from the early degradation induced by gamma‐ray irradiation. Defect density characterization reveals that gamma‐ray irradiation does not induce electronic trap states. These observations demonstrate the prospects of perovskite materials in applications of radiation detectors and space solar cells.