Synthesis and luminescence properties of KCaPO_4:Eu^(2+),Tb^(3+),Mn^(2+) for white-light-emitting diodes(WLED)  

作　　者：方宏威 黄山 韦先涛 段昌奎 尹民 陈永虎 

机构地区：[1]Department of Physics, University of Science and Technology of China

出　　处：《Journal of Rare Earths》2015年第8期825-829,共5页稀土学报（英文版）

基　　金：supported by National Key Basic Research Program of China(2013CB921800);the National Natural Science Foundation of China(11374291,11204292,11274299,11311120047);the Fundamental Research Funds for the Central Universities(WK2030020021);Anhui Provincial Natural Science Foundation(1308085QE75)

摘　　要：In order to obtain a single-host white-light phosphor, a series of KCaPO4 powder samples tri-doped with Eu2＋, Tb3＋ and Mn2＋ were synthesized via high-temperature solid-state reaction method. Their structural and luminescence properties were investigated. Under proper ultraviolet excitation （255-405 urn）, white light was obtained, consisting of blue, green and red emissions stemming from Eu2＋, Th3＋, Mn2＋ ions respectively. The temperature stability of our sample was analyzed by studying the variation tendeney of CIE chromaticity coordinates at different temperatures. The results indicated that this phosphor could yield good color stability when utilized in WLED.In order to obtain a single-host white-light phosphor, a series of KCaPO4 powder samples tri-doped with Eu2＋, Tb3＋ and Mn2＋ were synthesized via high-temperature solid-state reaction method. Their structural and luminescence properties were investigated. Under proper ultraviolet excitation （255-405 urn）, white light was obtained, consisting of blue, green and red emissions stemming from Eu2＋, Th3＋, Mn2＋ ions respectively. The temperature stability of our sample was analyzed by studying the variation tendeney of CIE chromaticity coordinates at different temperatures. The results indicated that this phosphor could yield good color stability when utilized in WLED.

关 键 词：single-phase white-light phosphor photoluminescence energy transfer color stability CIE chromaticity coordinates rare earths 

分 类 号：TQ422[化学工程]