Issue 15, 2024

Preparation of bismuth-doped CsPbBr3 perovskite single crystals for X-ray and gamma-ray sensing applications

Abstract

Perovskite materials are potential photo-absorbers, and their solution-processed perovskite layers are widely reported in photodetection devices. However, defects in perovskites pose a serious challenge to device performance. One possible way to overcome this set-back is growing a perovskite single crystal and deploying it in photon detection devices. Herein, we report the growth of pure and Bi-doped CsPbBr3 perovskite single-crystals and their high-energy photodetection characteristics. The Bi-doped CsPbBr3 perovskite single-crystals exhibited good photodetection characteristics in the visible, X-ray and gamma-ray regions. Under an illumination of 470 and 530 nm, the Bi-doped CsPbBr3 perovskite single-crystal photodetector displayed a linear response for the biasing voltage ranging from 2 V to 5 V. The device displayed a higher magnitude of photocurrent and exhibited a better ON/OFF ratio of ∼596 at λ = 470 nm and ∼24 at λ = 530 nm. The gamma ray detection properties of the Bi-doped CsPbBr3 perovskite single crystal were studied using two different radioactive sources with varying activity levels. A characterization study using a portable X-ray device revealed an excellent response to varying tube voltages and currents. The present study reveals the versatility of the Bi-doped CsPbBr3 perovskite single-crystals in photon detection under a wide range of illumination.

Graphical abstract: Preparation of bismuth-doped CsPbBr3 perovskite single crystals for X-ray and gamma-ray sensing applications

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Article information

Article type
Paper
Submitted
02 5 2024
Accepted
25 6 2024
First published
26 6 2024
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2024,5, 6309-6318

Preparation of bismuth-doped CsPbBr3 perovskite single crystals for X-ray and gamma-ray sensing applications

P. Sellan, M. Selvan, A. Perveen, D. Nasrud, S. Chandrasekar, P. Venkatraman, D. Nataraj, B. S. Bae, D. C. Onwudiwe and L. Wei, Mater. Adv., 2024, 5, 6309 DOI: 10.1039/D4MA00455H

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