Ultrabright and Highly Efficient All‐Inorganic Zero‐Dimensional Perovskite Scintillators. Issue 13 (30th April 2021)

• Record Type: Journal Article
• Authors: Cheng, Shuangliang; Nikl, Martin; Beitlerova, Alena; Kucerkova, Romana; Du, Xinyuan; Niu, Guangda; Jia, Yongchao; Tang, Jiang; Ren, Guohao; Wu, Yuntao
• Is Part Of: Advanced optical materials. Volume 9:Issue 13(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-04-30
• Subjects: low‐dimensional perovskites -- radiation detection -- scintillators -- single crystals -- light yield; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.202100460
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: Low‐dimensional halide perovskites with excellent luminescent properties have become leading candidates for optoelectronic and radiation‐detection applications. In this work, Tl cation is incorporated into 0D perovskite Cs3 Cu2 I5 host and an ultrabright and efficient scintillator is developed for X‐ray and γ‐ray detection. The Tl‐doped Cs3 Cu2 I5 crystals exhibit a high photoluminescence quantum efficiency of 79.2%. The radioluminescence emission of Cs3 Cu2 I5 :Tl crystal under X‐ray excitation consists of a self‐trapped exciton emission at 440 nm and a Tl‐related emission at 510 nm at room temperature. With optimized Tl doping, the Cs3 Cu2 I5 not only demonstrates about five‐times enhanced steady‐state scintillation yield up to 150 000 photons/MeV and an improvement of X‐ray detection limit from 103.6 to 66.3 nGy s −1, but also maintains an extremely low afterglow of 0.17% at 10 ms after X‐ray cut‐off. The Cs3 Cu2 I5 :Tl also possess a remarkable energy resolution of 3.4% at 662 keV and an ultrahigh light yield of 87 000 photons/MeV under 137 Cs γ‐ray radiation. Abstract : The 0D perovskite Cs3 Cu2 I5 :Tl single crystal shows simultaneously high effective atomic number, air‐stable and self‐absorption free characteristics, ultrahigh scintillation efficiency, ultralow afterglow, and remarkable γ‐resolution properties, which demonstrates the considerable potential of low‐dimensional metal halide perovskites as highly efficient X‐ray and γ‐ray scintillators.