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High-Gain and Low-Driving-Voltage Photodetectors Based on Organolead Triiodide Perovskites

January 21, 2015
Authors

Rui Dong Yanjun Fang Jungseok Chae Jun Dai Zhengguo Xiao Qingfeng Dong Yongbo Yuan Andrea Centrone Xiao Cheng Zeng, and Jinsong Huang

Abstract

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 Pb2+ 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.