All-Perovskite Photodetector with Fast Response

• Published in: Nanoscale research letters Vol. 14; no. 1; pp. 291 - 8
• Main Authors: Yang, Yue, Dai, Haitao, Yang, Feng, Zhang, Yating, Luo, Dan, Zhang, Xiaoli, Wang, Kai, Sun, Xiao Wei, Yao, Jianquan
• Format: Journal Article
• Language: English
• Published: New York Springer US 22.08.2019; Springer Nature B.V; SpringerOpen
• Subjects: Carrier mobility; Chemistry and Materials Science; CsPbBr3 quantum dots; Fast response; Heterostructures; Materials Science; Metal halide perovskite materials and devices; Molecular Medicine; Nano Express; Nanochemistry; Nanoscale Science and Technology; Nanotechnology; Nanotechnology and Microengineering; Perovskite; Perovskites; Photodetector; Photometers; Physical properties; Quantum dots; Perovskite; quantum dots; CsPbBr; Photodetector; Fast response; CsPbBr3 quantum dots
• ISSN: 1931-7573; 1556-276X
• DOI: 10.1186/s11671-019-3082-z

Perovskites have attracted substantial attention on account of their excellent physical properties and simple preparation process. Here we demonstrated an improved photodetector based on solution-processing organic-inorganic hybrid perovskite CH 3 NH 3 PbI 3− x Cl x layer decorated with CsPbBr 3 perovskite quantum dots. The CH 3 NH 3 PbI 3− x Cl x -CsPbBr 3 photodetector was operated in a visible light region, which appeared high responsivity ( R = 0.39 A/W), detectivity ( D* = 5.43 × 10 9 Jones), carrier mobility ( μ p = 172 cm 2  V −1 s −1 and μ n = 216 cm 2  V −1 s −1 ), and fast response (rise time 121 μs and fall time 107 μs). The CH 3 NH 3 PbI 3− x Cl x -CsPbBr 3 heterostructure is anticipated to find comprehensive applications in future high-performance photoelectronic devices.