Energy transfer and tunable luminescent properties in Eu2+/Tb3+/Eu3+ co-doped oxyfluoride aluminosilicate glass

• Published in: Journal of luminescence 2020-03, Vol.219, p.116966, Article 116966
• Main Authors: Ma, YaDan, Fei, MingZhi, Zhang, WenNa, Teng, LiMing, Hu, FangFang, Wei, RongFei, Guo, Hai
• Format: Article
• Language: English
• Subjects: Energy transfer; Luminescent glass; Rare earth ions
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2019.116966

A series of Eu2+/Tb3+/Eu3+ co-doped oxyfluoride aluminosilicate glass samples were synthesized by using the melt-quenching method in air atmosphere. Transmission spectra, excitation and emission spectra, decay curves and temperature-dependent emission spectra were utilized to investigate their luminescent properties systematically. Under near-ultraviolet excitation, adjustable white light emission is generated as a result of efficient energy transfer from Eu2+ to Tb3+ and from Tb3+ to Eu3+. Furthermore, the Eu2+/Tb3+/Eu3+ co-doped glass presents good thermal stability. At 423 K, the emission intensity of the optimal G-5Tb4Eu glass remains about 86% of its initial intensity at 298 K. These excellent properties indicate that Eu2+/Tb3+/Eu3+ co-doped oxyfluoride aluminosilicate glass may provide a new platform for designing and fabricating W-LEDs devices in the future. •Luminescence and energy transfer of Eu2+/Tb3+/Eu3+ co-doped oxyfluoride aluminosilicate glass were investigated.•The highest QE can reach 56.4% in G-5Tb0.2Eu glass excited by 378 nm.•At 423 K, the emission intensity of the optimal G-5Tb4Eu glass remains about 86% of its initial intensity at 298 K.