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High-quality components like metal halide phosphors, which are capable of efficiently converting light into quantifiable signals, are needed for advanced electronic systems.

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.