Impact Factor:6.4

DOI number:10.1039/d3tc01236k

Journal:Journal of Material Chemistry C

Key Words:OPTICALPROPERTIES;PEROVSKITE;PHOTODIODES;FABRICATION

Abstract:A narrowband photodetection system that can specifically distinguish green, yellow and red light has potential application in intelligent transportation systems. In this work, a series of MAPbBr(3-n)X(n) (X = Cl, I) single-crystal films with controllable thickness have been grown through space-limited inverse temperature crystallization. Filter-free narrowband photodetectors with peak responses at 505, 590 and 620 nm, corresponding to the green, yellow and red of traffic lights, are successfully achieved through the charge collection narrowing mechanism. The as-fabricated narrowband photodetectors demonstrate superior performance, with full width at half-maximum all less than 35 nm, a maximum responsivity of 182 mA W-1, and specific detectivity of 9.68 x 10(10) Jones. Finally, a traffic light recognition assembly based on the three narrowband photodetectors is constructed. The photocurrent of the photodetector is approximately five to ten times that of the interference from other light sources, indicating good color recognition capability for traffic lights.

Co-author:Shi-Fu Li, Jie Yu, Liang-Liang Zhou, Jiang Wang, Can Fu, Xiang An, Jian-An Huang, Li Wang, Lin-Bao Luo

First Author:Feng-Xia Liang

Correspondence Author:Li Wang, Lin-Bao Luo

Document Type:Article

Volume:11

Issue:30

Page Number:10198-10204

ISSN No.:2050-7526

Translation or Not:no

Date of Publication:2023-08-03