High‐Gain and Low‐Driving‐Voltage Photodetectors Based on Organolead Triiodide Perovskites. (21st January 2015)

• Record Type: Journal Article
• Authors: Dong, Rui; Fang, Yanjun; Chae, Jungseok; Dai, Jun; Xiao, Zhengguo; Dong, Qingfeng; Yuan, Yongbo; Centrone, Andrea; Zeng, Xiao Cheng; Huang, Jinsong
• Is Part Of: Advanced materials. Volume 27:Number 11(2015)
• Page Start: 1912
• Page End: 1918
• Publication Date: 2015-01-21
• Subjects: organolead triiodide perovskites -- photodetectors -- solution processing -- optoelectronics; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201405116
• Languages: English
• ISSNs: 0935-9648

Abstract

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 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.