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Pseudohalide‐Induced Moisture Tolerance in Perovskite CH 3 NH 3 Pb(SCN) 2 I Thin Films
Author(s) -
Jiang Qinglong,
Rebollar Dominic,
Gong Jue,
Piacentino Elettra L.,
Zheng Chong,
Xu Tao
Publication year - 2015
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.201503038
Subject(s) - thiocyanate , perovskite (structure) , degradation (telecommunications) , materials science , relative humidity , moisture , ion , thin film , humidity , chemical engineering , inorganic chemistry , chemistry , nanotechnology , composite material , electrical engineering , meteorology , organic chemistry , physics , engineering
Abstract Two pseudohalide thiocyanate ions (SCN − ) have been used to replace two iodides in CH 3 NH 3 PbI 3 , and the resulting perovskite material was used as the active material in solar cells. In accelerated stability tests, the CH 3 NH 3 Pb(SCN) 2 I perovskite films were shown to be superior to the conventional CH 3 NH 3 PbI 3 films as no significant degradation was observed after the film had been exposed to air with a relative humidity of 95 % for over four hours, whereas CH 3 NH 3 PbI 3 films degraded in less than 1.5 hours. Solar cells based on CH 3 NH 3 Pb(SCN) 2 I thin films exhibited an efficiency of 8.3 %, which is comparable to that of CH 3 NH 3 PbI 3 based cells fabricated in the same way.