A WLED based on LuAG:Ce3+ PiG coated red-emitting K2SiF6:Mn4+ phosphor by screen-printing

作者：Cao, Rui; Wu, Lingchao; Di, Xiaoxuan; Li, Pengzhi; Hu, Guangcai; Liang, Xiaojuan^*; Xiang, Weidong^*

来源：Optical Materials, 2017, 70: 92-98.

DOI：10.1016/j.optmat.2017.05.004

• LuAG
• K2SiF6:Mn4+
• Screen-printing
• Phosphor-in-glass
• WLED

It is high-profile that the use of phosphor-in-glass (PiG) is extensive because of its excellent advantages in thermal resistance and lifetime aspects, and so on. Here, white light-emitting diodes (WLED) based on LuAG:Ce3+ PiG coated red-emitting K2SiF6:Mn4+ (KSF) phosphors by screen-printing are fabricated. Among all of these, the commercial LuAG phosphors and glass raw materials of TeO2-based glass, were weighted and milled in an agate thoroughly. Then, the mixture was melted and sintered at 850 K or so for 20 min in the ambient atmosphere through low temperature co-fired method, cold-forming LuAG PiG clump and cut into different LuAG PiG thicknesses. After that, the commercial red phosphor KSF was coated on LuAG PiG by screen-printing technique. Finally, high-performance WLEDs based on the TeO2-based glass were obtained, tested and characterized, which exhibit a highest color rendering index of 94.1, a lowest color temperature of 3744 K and a largest luminous efficiency of 101.02 Im.W-1. Most noticeably of all, the promising method has excellent developing potential for industrialization in high power WLED.

• 出版日期2017-8
• 单位温州大学