Luminescence enhancement of CaMoO_(4):Eu^(3+) phosphor by charge compensation using microwave sintering method  

作　　者：Zhiping ZHOU Yingsen YU Xiaotang LIU Weihao YE Guangqi HU Bingfu LEI Yun YAN 

机构地区：[1]College of Materials and Energy,South China Agricultural University,Guangzhou 510642,China

出　　处：《Journal of Advanced Ceramics》2015年第4期318-325,共8页先进陶瓷（英文）

基　　金：supported by the National Natural Science Foundation of China(No.21271074);teamwork projects funded by Guangdong Natural Science Foundation(No.S2013030012842);CAS-Foshan Cooperation Funding Program(No.2012HY100685).

摘　　要：CaMoO_(4):Eu^(3+)and CaMoO_(4):Eu^(3+),A+(A=Li,Na,K)phosphors for light-emitting diode(LED)applications have been prepared by microwave sintering method(MSM),and their structure and luminescence properties are investigated.The influences of microwave reaction time and concentration of different kinds of charge compensation A+and Eu^(3+)on luminescence have also been discussed.The samples emit a red luminescence at 615 nm attributed to the^(5)D0→^(7)F2 transition of Eu^(3+)under 464 nm excitation.It is observed that adding charge compensation A+in the sample synthesis increases luminescence intensity.The optimized sample made with 32 mol%Li+and 32 mol%Eu^(3+)has an enhancement factor of 4 in photoluminescence compared to the sample made without charge compensation.The CIE(Commission Internationale de l'Eclairage)coordinates of Ca0.36MoO_(4):0.32Eu^(3+),0.32Li+are x=0.661 and y=0.339,which indicate that the obtained phosphor can be a promising red color candidate for white LED fabrications.

关 键 词：CaMoO4:Eu^(3+)phosphor luminescence enhancement charge compensation microwave sintering white light-emitting diode(LED) 

分 类 号：O61[理学—无机化学]