白光LED用蓝绿色荧光粉Sr1-xBax Al2O4:Eu2+的发光性质
Chinese Journal of Luminescence（2011）
Abstract
采用高温固相法在还原气氛中合成Sr1-xBaxAl2 O4:Eu2+荧光材料.XRD显示,当钡掺杂量x＜0.4时,对应样品主要为单斜SrAl2 O4晶体结构；当x≥0.4时,对应样品主要为简单六方BaAl2 O4晶体结构.在360nn激发下,样品的发射光谱随x的增加由单一的绿光发射(λmax=516nm)逐渐转变为蓝绿光双发射(λmax1=441 nm,λmax2 =486 nm).在Eu2摩尔分数为0.29％时,双发射峰强度最强；继续增加Eu2浓度,将出现浓度猝灭.研究表明,Sr1-xBax Al2 O4.Eu2+的浓度猝灭机理为电偶极-电偶极相互作用.
MoreTranslated text
Key words
SrAl2O4,concentration quenching,phosphors,white LED
AI Read Science
Must-Reading Tree
Example
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined