Nanosecond and Highly Sensitive Scintillator Based on All-Inorganic Perovskite Single Crystals

• Published in: ACS applied materials & interfaces Vol. 14; no. 1; pp. 1489 - 1495
• Main Authors: Li, Yang, Chen, Liang, Gao, Runlong, Liu, Bo, Zheng, Wei, Zhu, Yanming, Ruan, Jinlu, Ouyang, Xiaoping, Xu, Qiang
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 12.01.2022
• Subjects: Functional Inorganic Materials and Devices; high sensitivity; all-inorganic perovskite single crystals; nanosecond decay time; X-ray imaging; scintillator
• ISSN: 1944-8244; 1944-8252
• DOI: 10.1021/acsami.1c21055

The scintillator is a unique class of luminescent materials, which is of great significance in clinical diagnosis, security inspection, and radiation detection. Herein, an all-inorganic Cs4PbI6 single crystals (SCs) as a nanosecond and an efficient X-ray and α particle scintillator is described. The radioluminescence (RL) spectrum of Cs4PbI6 SCs under X-ray excitation consists of a band gap emission at 310 nm and a broadband emission at 552 nm at room temperature. Furthermore, Cs4PbI6 SCs demonstrate nanosecond decay times of 0.95 and 6.86 ns, a high sensitivity to low-energy X-ray (30 keV) with a low detection limit (187 nGyair/s), and a favorable linearity detection range, potentially enabling their broad application in X-ray imaging. Under 237Np α particle irradiation, the light yield of Cs4PbI6 SCs is about 49.5% of that of a BGO scintillator with an energy resolution of 35% at 4.78 MeV. Our results demonstrate the potential of Cs4PbI6 SCs as a nanosecond and low-cost scintillator in radiation detection applications.