Non-Hygroscopic, Self-Absorption Free, and Efficient 1D CsCu2I3 Perovskite Single Crystal for Radiation Detection.
A novel all-inorganic CsCu2I3 single-crystalline perovskite as a nonhygroscopic and efficient X-ray and γ-ray scintillator is described herein. It is featured by a one-dimensional (1D) perovskite structure with an orthorhombic system and a space group of Cmcm. The CsCu2I3 crystal emits yellow light peaking at 570 nm originated from strongly localized 1D exciton emission. It appears self-absorption free because of the large Stokes shift of 1.54 eV. The photophysics process of the self-trapped exciton was studied using temperature dependent photoluminescene spectra and decay kinetics measurements. The CsCu2I3 crystal exhibits an extremely low afterglow level of 0.008% at 10 ms under X-ray excitation. Under 137Cs γ-ray irradiation, its light yield is 16 000 photons/MeV with an energy resolution of 7.8% at 662 keV.
['Cheng|Shuangliang|S|', 'Beitlerova|Alena|A|', 'Kucerkova|Romana|R|', 'Mihokova|Eva|E|', 'Nikl|Martin|M|http://orcid.org/0000-0002-2378-208X', 'Zhou|Zhengyang|Z|', 'Ren|Guohao|G|', 'Wu|Yuntao|Y|http://orcid.org/0000-0002-9708-0304']
perovskite single crystal radiation detection scintillator Bridgman method cesium copper iodide