Issue 10, 2023

Narrow-bandgap Sn–Pb mixed perovskite single crystals for high-performance near-infrared photodetectors

Abstract

Narrow-bandgap Sn–Pb mixed perovskite single crystals are highly promising as photoactive materials for efficient and low-cost near-infrared (NIR) photodetectors. However, because of the significant difference in the crystallization velocities for Pb- and Sn-based perovskites, Sn–Pb mixed perovskites are peculiarly prone to phase separation during the crystallization process, causing the degradation of the optical and electronic properties of materials. Herein, we propose a low-temperature space-confined technique (LT-SCT) that simultaneously reduces the crystallization velocities of pure Sn and Pb perovskites, enabling the fabrication of pure-phase (FASnI3)0.1(MAPbI3)0.9 single crystals. The resulting (FASnI3)0.1(MAPbI3)0.9 single crystals exhibit excellent crystallinity with a high hole mobility of 7.44 × 103 cm2 V−1 s−1 and a low surface trap density of 1.88 × 109 cm−2. These properties benefit the application of (FASnI3)0.1(MAPbI3)0.9 single crystals in self-powered NIR photodetectors and yield outstanding comprehensive performance, especially with a broad linear dynamic range of up to 163.5 dB, a large responsivity (R) of 0.53 A W−1, and a fast response speed of 22.78 μs in the NIR spectral region (750–860 nm). Furthermore, high-quality NIR imaging and wearable health monitoring are achieved by employing high-performance and self-driven NIR photodetectors. This work contributes to developing Sn–Pb mixed perovskite single crystals and provides a promising candidate for efficient and low-cost NIR photodetection.

Graphical abstract: Narrow-bandgap Sn–Pb mixed perovskite single crystals for high-performance near-infrared photodetectors

Supplementary files

Article information

Article type
Paper
Submitted
19 Okt. 2022
Accepted
03 Febr. 2023
First published
03 Febr. 2023

Nanoscale, 2023,15, 5053-5062

Narrow-bandgap Sn–Pb mixed perovskite single crystals for high-performance near-infrared photodetectors

Z. Chang, Z. Lu, W. Deng, Y. Shi, Y. Sun, X. Zhang and J. Jie, Nanoscale, 2023, 15, 5053 DOI: 10.1039/D2NR05800F

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