Issue 4, 2019

Inorganic CsBi3I10 perovskite/silicon heterojunctions for sensitive, self-driven and air-stable NIR photodetectors

Abstract

In this study, a sensitive near-infrared (NIR) photodetector based on a CsBi3I10 perovskite/Si heterojunction is developed by directly coating a layer of inorganic perovskite onto a planar Si substrate. The as-constructed heterojunction displays a representative current rectifying behavior in the dark and remarkable photoresponse properties upon light irradiation. The distinct photovoltaic effect enables the device to function as a self-driven photodetector working at zero bias. Furthermore, it is observed that the photodetector is sensitive in a wide spectral region with peak sensitivity at ∼820 nm. Under 808 nm illumination, the critical photoresponse parameters of responsivity, external quantum efficiency and specific detectivity reached 178.7 mA W−1, 27.2% and 4.99 × 1010 Jones at zero bias, respectively, which can be further increased to as high as 492.1 mA W−1, 75.2% and 1.38 × 1011 Jones at a working bias of −1 V. What is more, the present device also holds a large Ilight/Idark ratio of ∼1 × 104, a rapid response speed of 73/36 μs, and excellent air stability even after 3 months of storage under ambient conditions. Considering the good photoresponse performance and facile assembly approach, the CsBi3I10 perovskite/Si heterojunction possesses huge potential for future cost-effective and high-performance photodetection applications.

Graphical abstract: Inorganic CsBi3I10 perovskite/silicon heterojunctions for sensitive, self-driven and air-stable NIR photodetectors

Supplementary files

Article information

Article type
Paper
Submitted
16 noy 2018
Accepted
08 dek 2018
First published
11 dek 2018

J. Mater. Chem. C, 2019,7, 863-870

Inorganic CsBi3I10 perovskite/silicon heterojunctions for sensitive, self-driven and air-stable NIR photodetectors

X. Tong, Z. Zhang, D. Wang, L. Luo, C. Xie and Y. Wu, J. Mater. Chem. C, 2019, 7, 863 DOI: 10.1039/C8TC05765F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements