Investigation on Yb~(3+)/Er~(3+)/Tm~(3+) tri-doped phosphate glass ceramic for white-light-emitting diode

摘要

Yb~(3+)/Er~(3+)/Tm~(3+) tri-doped phosphate glass ceramics were prepared by a high-temperature melting method and thermal treatment technology. Upconversion (UC) emissions of the Yb~(3+)/Er~(3+)/Tm~(3+) tridoped phosphate glass ceramic samples were studied under 975 nm excitation. The glass ceramic samples can simultaneously generate blue, green, and red emissions. The multicolor emission obtained was tuned to white light by adjusting the Er~(3+) ion concentration. The emission color of the sample doped with 8 mol.percent Er~(3+) ion is white to the naked eye, and CIE coordinates (x velence 0.316, y velence 0.354) of the sample are close to the standard equal energy white-light illumination (x velence 0.333, y velence 0.333). The material will be useful in developing the white-light-emitting diode.