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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第27卷    第5期    总第218期    2017年5月

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文章编号:1004-0609(2017)-05-0974-07
共沉淀法制备Eu3+掺杂La3PO7荧光材料及其性能
欧 娅1, 2,付 兵1, 2,朱莉萍3,陈雪羽1,杨锦瑜1, 2

(1. 贵州师范大学 化学与材料科学学院,贵阳 550001;
2. 贵州师范大学 贵州省功能材料化学重点实验室,贵阳 550001;
3. 贵州师范大学 教育科学学院,贵阳 550001
)

摘 要: 采用共沉淀法合成Eu3+掺杂La3PO7荧光材料,利用X射线衍射(XRD)、扫描电镜(SEM)、傅里叶红外光谱(FT-IR)和荧光光谱等对合成产物的物相结构和光学性能进行研究,并对合成体系的pH值、Eu3+掺杂量的影响进行分析。结果表明:采用共沉淀法可制备单一相单斜晶系的La3PO7:Eu3+晶体。所制备La3PO7:Eu3+样品可被 280 nm波长紫外光有效激发,在617nm处发射出属于Eu3+5D0-7F2跃迁的强烈红色光。当Eu3+掺杂量高于4%时(摩尔分数) 观察到浓度淬灭现象,其浓度猝灭机理为离子间交换相互作用。

 

关键词: La3PO7荧光材料;Eu3+掺杂;共沉淀法;荧光性能

Co-precipitation synthesis and optical properties of Eu3+ doped La3PO7 phosphors
OU Ya1, 2, FU Bing1, 2, ZHU Li-ping3, CHEN Xue-yu1, YANG Jin-yu1, 2

1. School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, China;
2. Key Lab for Functional Materials Chemistry of Guizhou Province, Guizhou Normal University, Guiyang 550001, China;
3. School of Educational Science, Guizhou Normal University, Guiyang 550001, China

Abstract:Eu3+ doped La3PO7 phosphors were synthesized by co-precipitation method. The crystal structure and optical properties of the as-synthesized samples were investigated by XRD, SEM, FT-IR and FL. The influences of pH and doping content of the as-prepared samples were also discussed. The results show that the single-phase La3PO7:Eu3+ crystals with monoclinic structure can be obtained. The photoluminescence spectra show strong red emission at 617 nm originating from 5D0-7F2 transition of Eu3+ ions under 280 nm light excitation. The concentration quenching phenomenon is observed when the doping content is over 4% (mole fraction),and the concentration quenching mechanism is caused by the exchange interaction of Eu3+ ions.

 

Key words: La3PO7 phosphors; Eu3+ doping; co-precipitation method; fluorescence property

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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