Bi3+assisted luminescence in SrMoO_(4):Sm^(3+) red phosphors  

作　　者：Vaibhav Chauhan Prashant Dixit Praveen C.Pandey 

机构地区：[1]Department of Physics,Indian Institute of Technology(Banaras Hindu University),Varanasi,221005,UP,India

出　　处：《Journal of Rare Earths》2021年第11期1336-1343,I0002,共9页稀土学报（英文版）

基　　金：CSIR,India;UGC,India for the financial support provided in the form of a senior research fellowship grant。

摘　　要：In this paper,we report synthesis of pure SrMoO_(4),Sm^(3+)(1 at%-5 at%)doped SrMoO_(4)and Bi^(3+)(1 at%-3 at%)co-doped in 4 at%Sm^(3+)doped SrMoO_(4)(SrMoO_(4):4 Sm^(3+))phosphors by solution combustion method.The X-ray diffraction(XRD)analysis reveals the tetragonal phase of all samples,also Bi^(3+)co-doping supports crystallite size growth and reduces lattice strain.Absorption analysis of Sm^(3+)doped SrMoO_(4)ascertains a decrease in band gap and Bi^(3+)co-doping confirms the emergence of an absorbance peak at around 308 nm attributed to Bi^(3+)energy levels.Photoluminescence(PL)analysis ascertains an increase in emission peaks for Sm^(3+)doped SrMoO_(4)up to 4%concentration,which are attributed to an electron transition from 4 G5/2 to 6 HJ(J=5/2,7/2,9/2,and 11/2)energy levels of Sm^(3+)ions.We have explained the effects of Bi^(3+)co-doping on the luminescence of Sm^(3+)doped SrMoO_(4).The reduced microstrain and increased crystallinity of the phosphors as a result of Bi^(3+)co-doping and their correlation with the luminescence of Sm^(3+)ions are discussed.

关 键 词：SrMoO_(4):Sm^(3+) Bismuth ion PHOTOLUMINESCENCE Absorption study CRYSTALLINITY MICROSTRAIN 

分 类 号：TQ422[化学工程]