摘要
以Gd2O3,MoO3,Eu2O3为原料,采用传统的高温固相反应方法制备了一种新的白光LED用红色荧光粉材料α相Gd2(MoO4)3∶Eu。利用XRD,SEM,激发和发射光谱对其进行了研究。分析了助熔剂和激活剂对样品的晶体结构,表面形貌和发光性能的影响。结果表明这种荧光粉可以被近紫外光(395nm)和蓝光(465nm)有效激发,发射峰值位于613nm(Eu3+离子的5D0→7F2跃迁)的红光,激发波长与目前广泛使用的蓝光和紫外光LED芯片相符合。因此,三价Eu离子激活的α相Gd2(MoO4)3是一种可能应用在白光LED上的红色荧光粉材料。
A novel red phosphor α-Gd2 （MoO4）3 ： Eu was synthesized by conventional solid state reaction method with the starting materials： Gd2O3, MoO3 and Eu2O3. The effects of flux and Eu concentration on the crystal structure, morphology and luminescent properties of the phosphors were investigated. The results showed that non-agglomeration phosphors with regular morphology and fine size were produced after the mixture being calcined at 800 ℃ for 4h with 3 % NH4 F as flux. The main emission peak of the samples is at 613 nm. The excitation spectrum showed that this phosphor can be effectively excited by ultraviolet （UV） （395 nm） and blue （465 nm） light, nicely fitting in with the widely applied output wavelengths of ultraviolet or blue LED chips. The α-Gd2 （MoO4）3 phosphor may be a good candidate phosphor for solid state lighting application.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2007年第4期629-633,共5页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(50572102
50502131)
吉林省自然科学基金项目(1999514
20030514-2)
吉林省杰出青年基金项目(20040113)资助
