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Reducing Detrimental Defects for High‐Performance Metal Halide Perovskite Solar Cells
Author(s) -
Ono Luis K.,
Liu Shengzhong Frank,
Qi Yabing
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201905521
Subject(s) - passivation , perovskite (structure) , photovoltaic system , halide , materials science , semiconductor , band gap , crystallographic defect , optoelectronics , engineering physics , nanotechnology , electrical engineering , chemistry , inorganic chemistry , engineering , physics , condensed matter physics , chemical engineering , layer (electronics)
In several photovoltaic (PV) technologies, the presence of electronic defects within the semiconductor band gap limit the efficiency, reproducibility, as well as lifetime. Metal halide perovskites (MHPs) have drawn great attention because of their excellent photovoltaic properties that can be achieved even without a very strict film‐growth control processing. Much has been done theoretically in describing the different point defects in MHPs. Herein, we discuss the experimental challenges in thoroughly characterizing the defects in MHPs such as, experimental assignment of the type of defects, defects densities, and the energy positions within the band gap induced by these defects. The second topic of this Review is passivation strategies. Based on a literature survey, the different types of defects that are important to consider and need to be minimized are examined. A complete fundamental understanding of defect nature in MHPs is needed to further improve their optoelectronic functionalities.