金属离子Li+、Na+、Al3+掺杂的BaF2∶Eu3+荧光粉的制备及发光特性

采用高温固相法合成了金属离子Li+、Na+、Al3+掺杂的BaF2∶Eu3+荧光粉体.用X射线衍射、扫描电子显微镜、光致发光光谱和荧光衰减曲线分别对其微结构、形貌、发光性能进行表征.实验结果表明, 在266 nm激发下, 与单掺23%Eu3+样品相比, 掺杂摩尔浓度为9%的 Li+、Na+、Al3+样品的611 nm处发光强度分别提高了4.71倍、1.51倍及1.35倍.掺入Li+或Al3+后Eu3+的5D0能级的寿命变长, Na+的掺入使Eu3+的能级寿命变短.相比BaF2∶23% Eu3+样品, 9% Li+、6% Na+、23%Eu3+共掺BaF2样品及9% Li+、12% Al3+、23%Eu3+共掺BaF2样品的发光分别提高1.73倍和3.05倍, 相应的能级寿命均增加.

Abstract

The metal ions Li+, Na+ and Al3+ co-doped BaF2∶Eu3+ phosphors were synthesized by the high temperature solid state reaction. The microstructure, morphologies and luminescent properties were characterized by X-ray diffraction, scanning electron microscopy, photoluminescence spectroscopy and fluorescence decay curves, respectively. The experimental results show that the emission intensity at 611 nm of Li+, Na+, Al3+ doped with 9% doping concentration is increased by 4.71 times, 1.51 times and 1.35 times respectively at 266 nm excitation, compared with the single doped 23% Eu3+ sample. After the incorporation of Li+ or Al3+, the lifetime of 5D0 level of Eu3+ becomes longer, and the incorporation of Na+ shortens the energy level life of Eu3+. Compared with BaF2∶23%Eu3+ sample, the luminescence intensities of 9% Li+, 6%Na+, 23%Eu3+ co-doped BaF2 sample and 9% Li+, 12% Al3+, 23%Eu3+ co-doped BaF2 sample increased by 1.73 times and 3.05 times respectively, and the corresponding energy level life was increased.

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叶颖, 王林香, 庹娟, 赵海琴. 金属离子Li⁺、Na⁺、Al³⁺掺杂的BaF₂∶Eu³⁺荧光粉的制备及发光特性[J]. 光子学报, 2018, 47(6): 0616003. YE Ying, WANG Lin-xiang, TUO Juan, ZHAO Hai-qin. Preparation and Luminescence Properties of Metal Ions Li⁺, Na⁺ and Al³⁺ Co-doped BaF₂∶Eu³⁺ Phosphors[J]. ACTA PHOTONICA SINICA, 2018, 47(6): 0616003.

金属离子Li⁺、Na⁺、Al³⁺掺杂的BaF₂∶Eu³⁺荧光粉的制备及发光特性

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