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Broadband near-infrared luminescence and energy transfer of Cr^(3+),Ce^(3+) co-doped Ca_(2)LuHf_(2)Al_(3)O_(12) phosphors

查看全文 作　　者：Jinpin [1,2,3]Wu;Weidong [1,2,3]Zhuang;Ronghui [1,2,3]Liu;Yuanhong [1,2,3]Liu;Tongyu [1,2,3]Gao;Chunpei [4]Yan;Min [1,2,3]Cao;Junhang [1,2,3]Tian;Xiaoxia [1,2,3]Chen 高影响力作者 机构地区：[1]National Engineering Research Center for Rare Earth Materials,GRINM Croup Co.,Ltd.,Beijing 100088,China;[2]GRIREM Advanced Materials Co.,Ltd.,Beijing 100088,China;[3]General Research Institute for Nonferrous Metals,Beijing 100088,China;[4]Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices,School of Chemistry,Biology and Materials Science,East China University of Technology,Nanchang 330046,China高影响力机构 出　　处：《Journal of Rare Earths》索引2021年第39卷第3期,共9页高影响力期刊 基　　金：Project supported by the National Key Research and Development Program of China(2016YFB400605)。 摘　　要：Broadband near-infrared phosphors are highly desirable for food testing.Targeted Ca_(2)LuHf_(2)Al_(3)O_(12):Cr^(3+)(CLHA:Cr^(3+)) and Ca_(2)LuHf_(2)Al_(3)O_(12):Ce^(3+),Cr^(3+)(CLHA:Ce^(3+),Cr^(^(3+))) phosphors were synthesized by the conventional high-temperature solid state reaction.The CLHA:Cr^(3+)phosphor,with a good thermal stability,shows a red shift owing to radiation reabsorption and non-radiative transition with increasing Cr^(3+)content.For co-doped sample,the emission intensity of Cr^(3+)can be enhanced by three times due to the energy transfer from Ce^(3+)to Cr^(3+),which can be evidenced by a significant overlap between the PLE of Cr^(3+)single-doped phosphor and the PL of Ce^(3+)single-doped phosphor.In addition,the mechanism of energy transfer is identified as a quadrupole-quadrupole interaction according to decay Lifetime and Dexter’s energy transfer formula.The broadband NIR emission peaked at 775 nm of CLHA:Cr^(3+),Ce^(3+)phosphor shows a bright prospect in nondestructive quality-control analysis systems for food. 关 键 词：Broadband near-infrared Energy transfer Garnet phosphor Rare earths
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