Research

2023.05.29　Room-Temperature, Solid-State Synthesis of High-Quality Cs3Cu2I5 Thin Films

A new solid-state process that produces smooth Cs₃Cu₂I₅ films with excellent optical properties and occurs at room temperature has been developed by Tokyo Tech researchers. Cs₃Cu₂I₅ is a metal halide phosphor that efficiently emits blue light upon photoexcitation and finds applicability in deep-UV photodetectors and γ-ray scintillators. The new method could pave the way for their use in advanced stacking devices for optical imaging, sensing, and communication.

Authors :　　Masatake Tsuji¹, Masato Sasase¹, Soshi Iimura^{1, 3, 4}, Junghwan Kim^{1, 2, 4},, and Hideo Hosono^{1, 3}
Title :　　 　Room-Temperature Solid-State Synthesis of ₃Cu₂I₅ Thin Films and Formation Mechanism for Its Unique Local Structure
Journal :　　Journal of the American Chemical Society
DOI :　　 　 10.1021/jacs.3c01713
Affiliations : ¹ MDX Research Center for Element Strategy, International Research Frontiers Initiative,Tokyo Institute of Technology
　　　　　　²Graduate School of Semiconductor Materials and Devices Engineering, Ulsan National Institute of Science and Technology
　　　　　　³National Institute for Materials Science (NIMS)
　　　　　　⁴Precursory Research for Embryonic Science and Technology (PRESTO)