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Published on: September 12, 2014
In situ construction of a Te/CsPbBr3 heterojunction for self-powered photodetector
Jie Zhang1,2, Jiaojiao Liu1,2
1College of Electronic and Information Engineering, Changshu Institute of Technology Changshu 215500 China zj2016@cslg.edu.cn liujiaojiao@cslg.edu.cn.
Abstract:
In this study, CsPbBr3 particles were prepared by a simple solvent evaporation method in ambient environment; the p-n heterojunction formed by CsPbBr3 particles on the surface of a single long Te wire was used to construct a high-performance Te/CsPbBr3 photodetector. Compared with CsPbBr3 PDs, the Te/CsPbBr3 photodetector showed improved photocurrent, and exhibited characteristics of excellent self-powered performance, broad-spectrum response (UV-visible), and ultra-fast response speed (t rise = 0.09 ms). In addition, under zero bias and upon 540 nm light irradiation, the device had good responsivity (0.35 mA W-1), high photosensitivity (up to 100 on/off ratio), and a detectivity of 1.42 × 1010 Jones. This study provides insight into the possibility of manufacturing high-performance self-powered photodetectors through a simple in situ construction of heterojunctions.
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