Ultranarrow-band filterless photodetectors based on CH3NH3PbCl x Br3- xmixed-halide perovskite single crystals

Chengyu Lu; Juanjuan Zhou; Chenyu Tang; Qinyong Dai; Yingquan Peng; Wenli Lv; Lei Sun; Sunan Xu; Weida Hu

doi:10.1088/1361-6528/acd944

Ultranarrow-band filterless photodetectors based on CH₃NH₃PbCl _x Br_{3- x}mixed-halide perovskite single crystals

Nanotechnology. 2023 Jun 12;34(34). doi: 10.1088/1361-6528/acd944.

Authors

Chengyu Lu¹, Juanjuan Zhou¹, Chenyu Tang¹, Qinyong Dai², Yingquan Peng^{1

3}, Wenli Lv¹, Lei Sun¹, Sunan Xu¹, Weida Hu⁴

Affiliations

¹ Institute of Microelectronics, College of Optical and Electronic Technology, China Jiliang University, Hangzhou, People's Republic of China.
² National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, People's Republic of China.
³ Institute of Microelectronics, School of Physical Science and Technology, Lanzhou University, Lanzhou, People's Republic of China.
⁴ State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, People's Republic of China.

PMID: 37236163
DOI: 10.1088/1361-6528/acd944

Abstract

Narrow-band photodetectors based on halide perovskite have recently attracted significant attention due to their exceptional narrow-band detection performance and tunable absorption peaks covering a wide optical range. In this work, we report mixed-halide CH₃NH₃PbCl_xBr_3-xsingle crystal-based photodetectors have been fabricated, where the Cl/Br ratios were varied (3:0, 10:1, 5:1, 1:1, 1:7, 1:14 and 0:3). Vertical and parallel structures devices were fabricated which exhibited ultranarrow spectral responses under bottom illumination, with a full-width at half-maximum less than 16 nm. The observed performance can be ascribed to the unique carrier generation and extraction mechanisms within the single crystal under short and long wavelength of illumination. These findings offer valuable insights into the development of narrow-band photodetectors that do not necessitate the use of filters and hold tremendous potential for a diverse array of applications.

Keywords: mixed-halide; narrowband; perovskite; photodetector; single-crystal.