Photoluminescence properties of Tm~(3+)/Tb~(3+)/Eu~(3+) tri-doped phosphate glass and glass ceramics for white-light-emitting diodes

摘要

Tm~(3+)/Tb~(3+)/Eu~(3+) tri-doped phosphate glasses are synthesized to explore new white-light-emitting materials. Under 365 nm excitation, the CIE coordinates (x = 0.339, y = 0.341) of the Eu0.07 glass sample are close to the standard equal energy white-light illumination (x = 0.333, y = 0.333). The quantum efficiency is very high (～72.27%). The energy transition from Tb~(3+) to Eu~(3+) is reasonably interpreted based on the analysis of the luminescence lifetimes. To enhance the white-light emission, Tm~(3+)/Tb~(3+)/Eu~(3+) tri-doped phosphate glass ceramics are prepared.