Oxide perovskite Ba2AgIO6 wafers for X-ray detection

Longbo Yang; Jincong Pang; Zhifang Tan; Qi Xiao; Tong Jin; Jiajun Luo; Guangda Niu; Jiang Tang

doi:10.1007/s12200-021-1236-y

Oxide perovskite Ba₂AgIO₆ wafers for X-ray detection

Front Optoelectron. 2021 Dec;14(4):473-481. doi: 10.1007/s12200-021-1236-y. Epub 2021 Oct 11.

Authors

Longbo Yang¹, Jincong Pang¹, Zhifang Tan¹, Qi Xiao¹, Tong Jin¹, Jiajun Luo², Guangda Niu¹, Jiang Tang¹

Affiliations

¹ Wuhan National Laboratory for Optoelectronics (WNLO), School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, China.
² Wuhan National Laboratory for Optoelectronics (WNLO), School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, China. luojiajun@mail.hust.edu.cn.

Abstract

X-ray detection is of great significance in biomedical, nondestructive, and scientific research. Lead halide perovskites have recently emerged as one of the most promising materials for direct X-ray detection. However, the lead toxicity remains a worrisome concern for further commercial application. Great efforts have been made to search for lead-free perovskites with similar optoelectronic properties. Here, we present a lead-free oxide double perovskite material Ba₂AgIO₆ for X-ray detection. The lead-free, all-inorganic nature, as well as the high density of Ba₂AgIO₆, promises excellent prospects in X-ray applications. By employing the hydrothermal method, we successfully synthesized highly crystalline Ba₂AgIO₆ powder with pure phase. Furthermore, we prepared Ba₂AgIO₆ wafers through isostatic pressure and built X-ray detectors with Au/Ba₂AgIO₆ wafer/Au photo-conductive structure. The as-prepared X-ray detectors showed a sensitivity of 18.9 µC/(Gy_air·cm²) at 5 V/mm, similar to commercial α-Se detectors showcasing their advantages for X-ray detection.

Keywords: X-ray detection; lead-free; oxide double perovskite.