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Zero‐Dimensional Cs 3 Cu 2 I 5 Perovskite Single Crystal as Sensitive X‐Ray and γ‐Ray Scintillator
Author(s) -
Cheng Shuangliang,
Beitlerova Alena,
Kucerkova Romana,
Nikl Martin,
Ren Guohao,
Wu Yuntao
Publication year - 2020
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.202000374
Subject(s) - scintillator , scintillation , orthorhombic crystal system , crystal (programming language) , perovskite (structure) , luminescence , single crystal , materials science , afterglow , photon , exciton , yield (engineering) , physics , crystal structure , crystallography , atomic physics , optics , optoelectronics , chemistry , condensed matter physics , astrophysics , detector , programming language , gamma ray burst , computer science , metallurgy
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 Cs 3 Cu 2 I 5 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 Cs 3 Cu 2 I 5 belongs to an orthorhombic system with a space group of Pnma . The Cs 3 Cu 2 I 5 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 Cs 3 Cu 2 I 5 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.