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Mechanisms and Suppression of Photoinduced Degradation in Perovskite Solar Cells
Author(s) -
Wei Jing,
Wang Qiuwen,
Huo Jiangding,
Gao Feng,
Gan Zhenyu,
Zhao Qing,
Li Hongbo
Publication year - 2021
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202002326
Subject(s) - materials science , perovskite (structure) , degradation (telecommunications) , dopant , photovoltaic system , optoelectronics , active layer , energy conversion efficiency , photovoltaics , nanotechnology , layer (electronics) , chemical engineering , doping , computer science , thin film transistor , electrical engineering , telecommunications , engineering
Abstract Solar cells based on metal halide perovskites have reached a power conversion efficiency as high as 25%. Their booming efficiency, feasible processability, and good compatibility with large‐scale deposition techniques make perovskite solar cells (PSCs) desirable candidates for next‐generation photovoltaic devices. Despite these advantages, the lifespans of solar cells are far below the industry‐needed 25 years. In fact, numerous PSCs throughout the literature show severely hampered stability under illumination. Herein, several photoinduced degradation mechanisms are discussed. With light radiation, the organic–inorgainc perovskites are prone to phase segregation or chemical decomposition; the oxide electron transport layers (ETLs) tend to introduce new defects at the interface; the commonly used small molecules‐based hole transport layers (HTLs) typically suffer from poor photostability and dopant diffusion during device operation. It has been demonstrated the photoinduced degradation can take place in every functional layer, including the active layer, ETL, HTL, and their interfaces. An overview of these degradation categories is provided in this review, in the hope of encouraging further research and optimization of relevant devices.