Zero‐Dimensional Cs3Cu2I5 Perovskite Single Crystal as Sensitive X‐Ray and γ‐Ray Scintillator. Issue 11 (28th August 2020)

• Record Type: Journal Article
• Authors: Cheng, Shuangliang; Beitlerova, Alena; Kucerkova, Romana; Nikl, Martin; Ren, Guohao; Wu, Yuntao
• Is Part Of: Physica status solidi. Volume 14:Issue 11(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-08-28
• Subjects: perovskites -- radiation detection -- scintillators -- single crystals; Solid state physics -- Periodicals; 530.4105
• DOI: 10.1002/pssr.202000374
• Languages: English
• ISSNs: 1862-6254

Abstract

Abstract : Low‐dimensional halide perovskites with highly efficient luminescent properties have attracted huge attention in optoelectronic and radiation detection applications in recent years. Herein, a highly efficient 0D Cs3 Cu2 I5 perovskite crystal is presented for X‐ray and γ‐ray detection that can be easily grown from the melt by the Bridgman method. The crystal structure of Cs3 Cu2 I5 belongs to an orthorhombic system with a space group of Pnma . The Cs3 Cu2 I5 crystal is nonhygroscopic and self‐absorption free due to a large Stokes shift of 120 nm originated from its self‐trapped exciton emission. Its scintillation emission centers at 440 nm with a principal decay time of 967 ns. The Cs3 Cu2 I5 crystal not only demonstrates a high scintillation yield of about 32 000 photons MeV −1 and an extremely low afterglow of 0.03% at 10 ms under X‐ray radiation, but also possesses a high light yield of 29 000 photons MeV −1 with an excellent energy resolution of 3.4% at 662 keV under γ‐ray radiation. Abstract : Low‐dimensional perovskite materials are promising alternatives for high‐performance radiation detection. Due to high effective atomic number, being nonhygroscopic and self‐absorption free, and exhibiting high scintillation yield, ultralow afterglow, and excellent energy resolution characteristics, the 0D Cs3 Cu2 I5 single crystal perovskite can be regarded as a versatile scintillator covering a wide range of radiation energies for various applications.