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High‐Gain and Low‐Driving‐Voltage Photodetectors Based on Organolead Triiodide Perovskites
Author(s) -
Dong Rui,
Fang Yanjun,
Chae Jungseok,
Dai Jun,
Xiao Zhengguo,
Dong Qingfeng,
Yuan Yongbo,
Centrone Andrea,
Zeng Xiao Cheng,
Huang Jinsong
Publication year - 2015
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.201405116
Subject(s) - trihalide , triiodide , photodetector , materials science , perovskite (structure) , photoconductivity , optoelectronics , photoelectric effect , electromotive force , inorganic chemistry , electrode , chemistry , halide , crystallography , physics , quantum mechanics , dye sensitized solar cell , electrolyte
Solution‐processed organometal trihalide perovskite photodetectors show a high photoconductive gain of above 400 across the UV to NIR range at a very low bias of −1 V. The charge traps caused by large concentrations of Pb 2+ cations at the top surface of the perovskite film are critical for achieving high gain in these devices via a trapped‐hole‐induced electron injection mechanism.