Year: 2025
Type: article
Abstract: In recent years, Copper(I)‐based inorganic halides have garnered significant interest for their exceptional optical properties. In this paper, Cs3Cu2Br5 single crystals are grown by the vertical Bridgman method, resulting in large transparent single crystals ≈40 mm in length. The crystals are characterized by X‐ray diffraction (XRD) and differential thermal analysis (DTA). Transmission spectra, photoluminescence (PL), temperature‐dependent fluorescence spectra, X‐ray excitation spectra, and photoluminescence decay time are also measured. The results indicate that the Cs3Cu2Br5 single crystal exhibits good optical transmittance of 85% in the wavelength range of 250–800 nm and a large direct bandgap of 3.85 eV. The Cs3Cu2Br5 single crystal displays intense broadband blue luminescence, featuring significant Stokes shifts, a microsecond‐long fluorescence lifetime decay, and higher quantum yield, all attributed to self‐trapped exciton emission. The temperature‐dependent fluorescence spectra of the crystals are measured to analyze the luminescence mechanism. In summary, the research indicates that the Cs3Cu2Br5 single crystal has certain potential applications in the field of photodetectors, light‐emitting diodes, scintillators, etc.
Source: Crystal Research and Technology
DOI: 10.1002/crat.70006
Authors: Can Chen, Jianguo Pan, Hai chao Zhou, Jia li Han, Xinxin Chen, Shangke Pan
Institution: Ningbo University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
Awards: G7481609470, G8083283711
OpenAlex ID: W4413197096