Luminescent characteristics of Tm~(3+)/Tb~(3+)/Eu~(3+) tri-doped borophosphate glasses for LED applications

摘要

Abstract Tm~(3+)/Tb~(3+)/Eu~(3+) tri-doped borophosphate glasses were prepared via melt quenching technique. The luminescent properties were characterized by photolumi-nescence excitation, photoluminescence spectra, decay curves and chromaticity coordinates. The energy transfer process of Tm~(3+)→Eu~(3+) and Tb~(3+)→Eu~(3+) were confirmed based on photoluminescence spectra,fluorescence decay lifetime measurements. The CIE chromaticity coordinates (0.3418, 0.3272) and color correlate temperature (CCT = 5055.95 K) close to the standard white-light illumination (0.333, 0.333 and CCT = 5454.12 K) could be achieved in 1.0 Tm~(3+)/2.0 Tb~(3+)/1.0 Eu~(3+) (mol%) tri-doped glass sample. It is expected that the as-prepared glasses may be a promising candidate for white-light-emitting diodes, luminescent materials and fluorescent display devices.