(1. 貴州師范大學 化學與材料科學學院，貴陽 550001；
2. 貴州師范大學 貴州省功能材料化學重點實驗室，貴陽 550001；
3. 貴州師范大學 教育科學學院，貴陽 550001)
摘 要: 采用共沉淀法合成Eu3+摻雜La3PO7熒光材料，利用X射線衍射(XRD)、掃描電鏡(SEM)、傅里葉紅外光譜(FT-IR)和熒光光譜等對合成產物的物相結構和光學性能進行研究，并對合成體系的pH值、Eu3+摻雜量的影響進行分析。結果表明：采用共沉淀法可制備單一相單斜晶系的La3PO7:Eu3+晶體。所制備La3PO7:Eu3+樣品可被 280 nm波長紫外光有效激發(fā)，在617nm處發(fā)射出屬于Eu3+的5D0-7F2躍遷的強烈紅色光。當Eu3+摻雜量高于4%時(摩爾分數) 觀察到濃度淬滅現象，其濃度猝滅機理為離子間交換相互作用。
關鍵字: La3PO7熒光材料；Eu3+摻雜；共沉淀法；熒光性能
（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
