稀土发光材料在固体白光LED照明中的应用

Rare Earth Luminescent Materials for White LED Solid State Lighting

固体白光发光二极管将成为21世纪新一代的节能光源。要实现白光发射的重要途径之一是利用稀土发光材料的荧光转换技术,把InGaN半导体管芯发射的460 nm蓝光或400 nm近紫外光转换成白光。分别就这两种管芯报道了我们研制的发射蓝、绿、黄、红等不同颜色的稀土发光材料:YAG∶Ce,Ca1-xSrxS∶Eu2+,Ga2S3∶Eu2+,MGa2S4∶Eu2+(M=Ca,Sr,Ba),SrGa2+xS4+y∶Eu2+,(Ca1-xSrx)Se∶Eu2+,SrLaGa3S6O∶Eu2+,(M1,M2)10(PO4)6X2,(M1=Ca,Sr,Ba;M2=Eu,Mn;X=F,Cl,Br),NaEu0.92Sm0.08(MoO4)2,并报道了由它们制成的白光发光二极管的色坐标、相关色温和显色指数等参数。

Solid-state white LED will be a new generation of energy-saving light source in 21 century. In order to emitting white light, one of important approaches is using luminescence conversion technology with rare earth phosphors, which can be excited by the 460 nm blue light or 400 nm near violet light emitted from the InGaN chip and then emit white light. The rare earths doped phosphors prepared by us such as YAG ： Ce^3＋, Ca1-x SrxS ： Eu^2＋, Ga2S3 ： Eu^2＋,MGa2S4 ： Eu^2＋ （M = Ca, Sr, Ba）, SrGa2＋ xS4＋ y ： Eu^2＋ , （Ca1- xSrx ） Se ： Eu^2＋ , SrLaGa3S6O ： Eu^2 ＋ , （M1, M2）10 （PO4）6X2（M1 = Ca, Sr, Ba; M2 = Eu, Mn; X = F, Cl, Br） and NaEuo 92 Smoos （MoO4）2 were reported. They emit blue, green, yellow or red color light. Some white LEDs were made by these phosphors with blue or near violet InGaN chips and their chromaticity coordinate （x, y）, correlated color temperature Tc, and color rendering index Ra are reported.