Fast Photoconductive Responses in Organometal Halide Perovskite Photodetectors

ACS Applied Materials & Interfaces
Fei WangDongxu Zhao

Abstract

Inorganic semiconductor-based photodetectors have been suffering from slow response speeds, which are caused by the persistent photoconductivity of semiconductor materials. For realizing high speed optoelectronic devices, the organometal halide perovskite thin films were applied onto the interdigitated (IDT) patterned Au electrodes, and symmetrical structured photoconductive detectors were achieved. The detectors were sensitive to the incident light signals, and the photocurrents of the devices were 2-3 orders of magnitude higher than dark currents. The responsivities of the devices could reach up to 55 mA W(1-). Most importantly, the detectors have a fast response time of less than 20 μs. The light and bias induced dipole rearrangement in organometal perovskite thin films has resulted in the instability of photocurrents, and Ag nanowires could quicken the process of dipole alignment and stabilize the photocurrents of the devices.

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Citations

Dec 15, 2016·Journal of the American Chemical Society·Zhenjun TanHailin Peng
May 17, 2017·ACS Applied Materials & Interfaces·Xiao-Wei TongZheng-Hua Wang
Aug 11, 2017·Chemical Society Reviews·Huan Wang, Dong Ha Kim
Apr 8, 2017·Scientific Reports·Bohee Hwang, Jang-Sik Lee
Dec 14, 2018·Nanoscale Research Letters·Abbas Ahmad KhanLin Dong
Mar 4, 2017·Advanced Materials·Shan Chen, Gaoquan Shi
May 1, 2021·Nanomaterials·Chunlong LiFangong Kong
May 31, 2018·ACS Applied Materials & Interfaces·Lin LiYongli Gao
May 23, 2018·The Journal of Physical Chemistry Letters·Sandheep RavishankarGermà Garcia-Belmonte

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