Authors
Xuanzhen Ye, Bin Fang, Xin Liu, Shilin Liu, Fangbao Wang, Xiaoyuan Song, Bin Wu, Wei Xu, Wei Huang, Zhichun Xu, Jiahao Geng, Dou Zhao, Liang Chen, Yadong Xu
Published in
ACS applied materials & interfaces. Sep 09, 2026. Epub Sep 09, 2026.
Abstract
The zero-dimensional (0D) copper halide perovskite Cs3Cu2I5 exhibits outstanding luminescence and scintillation properties, making it a highly promising scintillator for γ-ray detection. Solution growth is a favorable and inexpensive method for growing Cs3Cu2I5 single crystals; however, scalable growth of Cs3Cu2I5 crystals with low defect density suffers from the unavoidable formation of secondary phase CsCu2I3. In this work, centimeter-size, high quality Cs3Cu2I5 single crystals are synthesized via a constant-temperature solvent evaporation crystallization (CT-SEC) method, in which the formation of CsCu2I3 can be eliminated by precursor engineering. The phase evolution behavior is elucidated as the decrease in the I-/Cu+ concentration ratio during the growth of the Cs3Cu2I5 crystal. Through synergistic regulation of precursor antioxidative treatment and raw material stoichiometry, the long-term phase-stable growth of Cs3Cu2I5 single crystals is achieved. The obtained Cs3Cu2I5 crystals exhibit excellent energy resolutions of 5.38% for 137Cs and 13.30% for 241Am γ-ray irradiation.
PMID:
42714301
Bibliographic data and abstract were imported from PubMed on 09 Sep 2026.
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