Issue 10, 2018

A broad-spectral-response perovskite photodetector with a high on/off ratio and high detectivity

Abstract

Given their high photoconversion efficiency, organometal halide perovskites have attracted much interest in ultraviolet-visible-near infrared photodetectors (PDs). However, recombination of carriers in perovskites, which leads to low photocurrent, has always been an adverse factor for device performance. Here, we demonstrate a way to overcome this problem by incorporating technologically-mature Si. Meanwhile, the dark current of the device can be maintained at a low level after inserting a TiO2 layer between the CH3NH3PbI3 film and the Si substrate. The fabricated CH3NH3PbI3/TiO2/Si tri-component PD displays a high on/off ratio of 6 × 103 and a high detectivity of 4.85 × 1013 Jones. In addition, the PD shows broad photoresponse with a long cut-off wavelength of 1100 nm. The design here provides an intriguing way for improving perovskite-based PDs.

Graphical abstract: A broad-spectral-response perovskite photodetector with a high on/off ratio and high detectivity

Supplementary files

Article information

Article type
Research Article
Submitted
19 iyn 2018
Accepted
23 iyl 2018
First published
16 avq 2018

Mater. Chem. Front., 2018,2, 1847-1852

A broad-spectral-response perovskite photodetector with a high on/off ratio and high detectivity

X. Yi, Y. Wang, N. Chen, Z. Huang, Z. Ren, H. Li, T. Lin, C. Li and J. Wang, Mater. Chem. Front., 2018, 2, 1847 DOI: 10.1039/C8QM00303C

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