Photoluminescence and thermal stability of yellow-emitting Pr^(3+) doped CaAl_(2)O_(4) phosphors

查看全文 作　　者：Hua [1]Zou;Dengfeng [1]Peng;Zhenming [1]Chu;Xusheng [1]Wang;Yanxia [1]Li;Jun-Wei [2]Hou;Xi [1]Yao

机构地区：[1]Functional Materials Research Laboratory Tongji University,Siping Road 1239,Shanghai 200092,P.R.China;[2]School of Material Science and Engineering Tongji University,Shanghai 201804,P.R.China

出　　处：《Journal of Advanced Dielectrics》索引2013年第3卷第3期,共5页

基　　金：supported by the Natural Science Foundation of China(No.51072136);Specialized Research Fund for the Doctoral Program of Higher Education(No.20090072120034). 摘　　要：Pr^(3+)-doped CaAl_(2)O_(4) phosphors with broad yellow emission were synthesized by conventional solid-state reaction in air and their structural and luminescent properties were investigated.A pure monoclinic structure can be obtained when the sintering temperature is 1400℃ or above.With photoluminescence(PL)measurement,the excitation was observed at 450–500 nm,which covered the emission of the blue light-emitting diode(LED)chips.Emission of the phosphors showed a green band and a red band.So these phosphors showed great potential in application of warm white LEDs without reabsorption.Additionally,the optimal emission intensity was obtained when Pr doping level was at 0.2 mol%.Furthermore,the Pr-doped CaAl_(2)O_(4) phosphors have the higher quenching temperature.With an increase in temperature,the emission bands of Pr-doped CaAl_(2)O_(4) showed an abnormal blue-shift. 关键词：PHOSPHORS CaAl_(2)O_(4) yellow emission blue excitation thermal stability

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Photoluminescence and thermal stability of yellow-emitting Pr^(3+) doped CaAl_(2)O_(4) phosphors

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