High performance photodetector based on 2D CH3NH3PbI3 perovskite nanosheets. (2nd February 2017)

• Record Type: Journal Article
• Authors: Li, Pengfei; Shivananju, B N; Zhang, Yupeng; Li, Shaojuan; Bao, Qiaoliang
• Is Part Of: Journal of physics. Volume 50:Number 9(2017)
• Publication Date: 2017-02-02
• Subjects: two-dimensional material -- perovskite nanosheets -- vertical structure -- photodetector; Physics -- Periodicals; 530
• DOI: 10.1088/1361-6463/aa5623
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: In this work, a high performance vertical-type photodetector based on two-dimensional (2D) CH3 NH3 PbI3 perovskite nanosheets was fabricated. The low trap density of the perovskite nanosheets and their short carrier diffusion distance result in a significant performance enhancement of the perovskite-based photodetector. The photoresponsivity of this vertical-type photodetector is as high as 36 mA W −1 at visible wavelength, which is much better than traditional perovskite photodetectors (0.34 mA W −1 ). Compared with traditional planar-type perovskite-based photodetectors, this vertical-type photodetector also shows the advantages of low-voltage operation and large responsivity. These results may pave the way for exploiting high performance perovskite-based photodetectors with an ingenious device design.