Fabrication of gel glass containing high rendering phosphor mixture via sol-gel process for LEDs

In this study, gel glass containing yellow, green and orange phosphors is fabricated via sol-gel process. Effects of different temperatures on condensation time of the sol and density of the gel glass are investigated. The gel glass is detected to confirm micro structure by SEM. The phosphors are well dispersed in the glass without phosphor degradation. The white light is successfully observed by packaging the glass to the blue LED chip. This study reveals that glass prepared by the sol-gel process has the ability to disperse phosphor or phosphor mixture at low temperature. The gel glass containing different phosphors in proper ratio applied in LED package realizes high CRI LED.