Luminescent properties of Cu+ doped aluminosilicate glasses: Effect of optical basicity and doping content

Abstract

Various Cu+ doped transparent aluminosilicate glasses were elaborated by melt quenching method. X-ray diffraction (XRD), transmission spectra, luminescent spectra and fluorescence decay curves were used to study their structural and luminescent properties systematically. By increasing optical basicity of glasses, excitation and emission peaks of Cu+ shift from 300 to 321 nm and from 445 to 536 nm, respectively. Furthermore, longer excitation (330 nm) and emission wavelengths (545 nm) are realized via growing Cu+ concentration. It suggests that the absorption and emission band of Cu+ in aluminosilicate glasses can be modified by altering the optical basicity of glass composition and Cu+ content. More importantly, the as-prepared Cu+ doped glasses show highly external quantum yields (35.8–57.4%) and excellently thermal stability. At 428 K, Cu+ doped glass excited by 330 nm can keep 75% emission intensity of that at 308 K. And chromaticity shows only a tiny shift with increasing temperature. Our research may provide a strategy for extending the practical application of Cu+ doped transparent luminescence glasses.