Solid state-hydrothermal synthesis and photoluminescence of LaVO4 : Eu3+ nanophosphors
Solid state-hydrothermal synthesis and photoluminescence of LaVO4 : Eu3+ nanophosphors
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DOI：
10.1016/j.matlet.2009.01.073
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发表时间：
2009-04
影响因子：
3
通讯作者：
B. Yan;Jianhua Wu
中科院分区：
文献类型：
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作者：
B. Yan;Jianhua Wu
采用改进的水热法合成了LaVO4：Eu3+纳米荧光粉。将各种无机盐（固态水合稀土硝酸盐和NH_4VO_3）与沉淀剂（氨水和尿素）混合，形成固态前驱体，代替一般的水溶液体系，水热反应体系中存在少量的水。X射线粉末衍射（XRD）和透射扫描电镜（TEM）分析表明，合成产物具有均匀的微观结构，粒径在60 nm左右，且合成产物的物相纯度高于合成产物。LaVO4：Eu3+在617 nm处有很强的红光发射，这是由于Eu3+的5D0 → 7F2超灵敏跃迁引起的。特别是LaVO4：氨源Eu3+纳米荧光粉比尿素源Eu3+纳米荧光粉具有更优异的发光性能（寿命和量子效率）。
A modified hydrothermal process is engaged in the synthesis of LaVO4: Eu3+nanophosphor. All kinds of inorganic salts (solid state hydrated rare earth nitrates and NH4VO3) and precipitation reagents (ammonia and urea) are mixed to form the solid state precursors instead of general aqueous solution systems, and a little amount water exists in the hydrothermal reaction systems. Both X-ray powder diffraction (XRD) and transmission scanning electronic microscope (TEM) shows that the uniform microstructure with the particle size of around 60 nm and the product from ammonia possesses the higher phase purity than that from urea. LaVO4: Eu3+shows a strong red emission at 617 nm originating from the5D0→7F2hypersensitive transition of Eu3+ion. Especially the LaVO4: Eu3+nanophosphor from ammonia presents the more excellent photoluminescent property (lifetime and quantum efficiency) than that from urea.