WANG Wenqiang ¹, XIAO Zhuohao ¹, XIAO Xiaodong ¹, WANG Sanhai ¹, TAO Xinyue ¹, LI Xiuying ¹,KONG Lingbing ¹, DONG Hongbo ²

(1. Jingdezhen Ceramic University, Jingdezhen 333403, Jiangxi, China; 2. Linyi University, Linyi 276000, Shandong, China)

Abstract: Blue laser diode (LD) combined with appropriate phosphors have been recognized as next generation solid white lighting technology. The conventional silicone package LD has the problem of efficiency droop, limiting the application in high power field. In this work, glass phosphors were developed by using MgO-BaO-SiO₂ as the glass matrix and Ce:YAG as phosphor. The glass phosphors were integrated with 450 nm LD chip for white light emission. Phase composition and microstructure of the glass phosphors were systematically studied, while their luminescent performances were evaluated and discussed. Luminescent parameters, including luminous efficiency of 125.31 lm·W−1, correlated color temperature of 5286 K and CIE coordinates of (0.33, 0.33), were achieved in the sample with 12 wt.% Ce:YAG. These glass phosphors could find potential applications for high power white lighting.

Key words: laser illumination; fluorescent glass; Ce:YAG; luminescence