Self-powered photodetectors based on CsxDMA1-xPbI3 perovskite films with high detectivity and stability

被引：23
作者：
Li, Ludong [1 ,2 ]
Zhang, Fan [1 ,2 ]
Ye, Shuai [1 ,2 ]
Peng, Xiao [1 ,2 ]
Sun, Zhenhua [1 ,2 ]
Lian, Jiarong [1 ,2 ]
Liu, Liwei [1 ,2 ]
Qu, Junle [1 ,2 ]
Song, Jun [1 ,2 ]
机构：
[1] Shenzhen Univ, Key Lab Optoelect Devices & Syst, Minist Educ, Shenzhen 518060, Guangdong, Peoples R China
[2] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Guangdong, Peoples R China
来源：
NANO ENERGY | 2020年 / 71卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Perovskite photodetectors; Self-powered electronics; High detectivity; Broadband detection; Cs(x)DMA(1-x)PbI(3); RECENT PROGRESS; SOLAR-CELLS; HALIDE; ALPHA-CSPBI3; EFFICIENT; NOISE; LIGHT;
D O I：
10.1016/j.nanoen.2020.104611
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Metal halide perovskites are widely studied in photodetection applications due to their outstanding optical and electrical properties. However, it is still a challenge to develop self-powered perovskite photodetectors with all the characteristics of high photoresponse performance, broad spectral response range, and excellent long-term stability. Herein, we demonstrate the high-performance self-powered photodetectors based on optimized Cs(x)DMA(1-x)PbI(3) (0.7 < x < 1) perovskite films. By adjusting the solution concentration and molar ratio of CsI/DMAPbI(3) in the perovskite precursor, the dark current of devices was decreased significantly by three orders of magnitude and the light current of devices was improved at the same time. Systematic investigations have revealed that the improvement of device performance originates from the reduced bandgap, decreased trap density and increased film thickness of the optimized perovskite films. The optimal self-powered photodetectors display broad spectral response range (300-750 nm), high specific detectivity (>1. 10(13) Jones), fast response, and excellent long-term stability. These intriguing results indicate that Cs(x)DMA(1-x)PbI(3) perovskite films have tremendous application potential in future self-powered photoelectrical detection technology.
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页数：10
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