Issue 30, 2023

Low ion migration and defect density MAPbX3 single crystals grown at low temperature for X-ray detection

Abstract

Defects and the ion migration in perovskite single crystals seriously degrade the performance of corresponding devices, regardless of the outstanding optoelectronic properties. In this work, we demonstrated that the ion migration and the defect density in MAPbX3 perovskite single crystals can be suppressed via lowering the growth temperature to 4 °C (LT) of the liquid-diffusion induced crystallization method (LDSC). The MAPbBr3 single crystals grown with the LT-LDSC method demonstrated a full-width at half-maximum (FWHM) of the (100) X-ray rocking curves of 0.0104°, a fluorescence lifetime of 1090 ns, a trap state density of 3.03 × 109 cm−3, an ionic activation energy of 0.52 eV, and a μτ product of 3.22 × 10−2 cm2 V−1. The low defect density and the weak ion migration in MAPbX3 single crystals lead to good X-ray detection performance under higher bias voltage. The X-ray detector has a high sensitivity of 409 μC Gyair−1 cm−2 at a high bias voltage of −40 V, which is the highest bias voltage of this single crystal radiation detector. This method of low temperature growth is instructive to the study of the whole crystal growth.

Graphical abstract: Low ion migration and defect density MAPbX3 single crystals grown at low temperature for X-ray detection

Supplementary files

Article information

Article type
Paper
Submitted
04 Apr 2023
Accepted
04 Jul 2023
First published
05 Jul 2023

J. Mater. Chem. A, 2023,11, 16201-16211

Low ion migration and defect density MAPbX3 single crystals grown at low temperature for X-ray detection

H. Li, Z. Zhang, W. Jiang, C. Zhao, H. Di, J. Ren, B. Ou, Y. Xiong, F. Liao and Y. Zhao, J. Mater. Chem. A, 2023, 11, 16201 DOI: 10.1039/D3TA02016A

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