Issue 24, 2023

Bio-inspired micro area concentrated array assisted perovskite photodetector toward weak light imaging

Abstract

Perovskite photodetectors (PVK PDs) have emerged as weak-light imaging devices due to their favorable carrier mobility, induced light absorption, and photoelectric performance. Modifying the optical structure is an effective strategy for improving the light-collecting performance and sensitivity of the device. Here, a designed and fabricated bio-inspired micro-area concentrated perovskite photodetector system with a micro hemisphere structured array exhibits superior capabilities in light harvesting, and achieves excellent PD device electrical performance and weak light imaging. The responsivity (R) and detectivity (D*) of the micro area concentrated PVK PD reach 0.2 A W−1 and 1.37 × 1013 Jones, which are 16.4 and 11.7 times higher than that of the pristine material. The on/off ratio of the micro area concentrated PVK PD is up to 1.6 × 104. The micro hemisphere structured array of PD significantly enhances the weak light sensitivity and results in the realization of weak light imaging under 0.64 μW cm−2.

Graphical abstract: Bio-inspired micro area concentrated array assisted perovskite photodetector toward weak light imaging

Supplementary files

Article information

Article type
Paper
Submitted
07 9 2022
Accepted
31 10 2022
First published
01 11 2022

J. Mater. Chem. C, 2023,11, 8045-8051

Bio-inspired micro area concentrated array assisted perovskite photodetector toward weak light imaging

L. Guo, K. Zhang, M. Tao, R. Zhao, T. Wu, Y. Wang and Y. Song, J. Mater. Chem. C, 2023, 11, 8045 DOI: 10.1039/D2TC03760B

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