Optimization and Temperature-Dependent Luminescence of LiBaPO[sub 4]:Eu[sup 2+] Phosphor for Near-UV Light-Emitting Diodes

Abstract

Blue-green phosphor, LiBaPO4:Eu2+LiBaPO4:Eu2+ , was prepared by solid-state reaction and optimized by adding H3BO3H3BO3 as flux. Temperature-dependent luminescence of LiBa0.95PO4:Eu0.052+LiBa0.95PO4:Eu0.052+ phosphor was investigated. Furthermore, the luminescence properties of bright blue-green light-emitting diodes (LEDs) fabricated by incorporating this phosphor with an InGaN-based near-UV chip were also studied based on different forward-bias currents. The results suggest that photoluminescence intensity of LiBaPO4:Eu2+LiBaPO4:Eu2+ can be improved by adding H3BO3H3BO3 , and luminescence of the prepared phosphor exhibits higher thermal stability than that of commercially available Y3Al5O12:Ce3+Y3Al5O12:Ce3+ phosphor. It is expected to be a good blue-green phosphor candidate for creating white light in phosphor-converted white LEDs.