硅酸盐学报

Sr6La4(SiO4)2(PO4)4O2: xEu2+, yMn2+荧光粉的制备及性能

作者：于灏君王宝辰刘艳改夏宇飞黄朝晖房明浩

单位：中国地质大学北京材料科学与工程学院非金属材料和固废资源材料利用北京市重点实验室矿物材料国家专业实验室北京 100083

关键词：磷灰石荧光粉高温固相法铕离子锰离子

分类号：O482.31

出版年,卷(期):页码：2018,46(12):0-0

DOI：10.14062/j.issn.0454-5648.2018.12.17

摘要：

采用高温固相法制备Sr6La4(SiO4)2(PO4)4O2: xEu2+，yMn2+荧光粉。通过X射线粉末衍射和结构精修研究了其物相组成和晶体结构以及该荧光粉的激发光谱、发射光谱、漫反射光谱、荧光热稳定性等发光性能。结果表明：该荧光粉具有磷灰石结构，Eu2+和Mn2+可占据结构中的2种阳离子格位。当Eu2+的掺杂量为1% (摩尔分数)、Mn2+的掺杂量为2%时，此荧光粉发光性能最好；荧光粉的发射光谱为450～550 nm的宽发射带，峰值位于478 nm，其激发光谱为220～400 nm的宽激发带，峰值位于302 nm，其色坐标值为(0.203 5，0.307 8)；Mn2+的掺杂有效的促进了荧光粉对近紫外光区域的吸收。当温度提升至150 ℃，Sr6La4(SiO4)2(PO4)4O2: 0.01Eu2+和Sr6La4(SiO4)2(PO4)4O2:(0.01Eu2+, 0.02Mn2+)荧光粉的发射光谱强度分别为室温的34.46%和51.79%；Mn2+的掺杂显著提升了其热稳定性。

Sr6La4(SiO4)2(PO4)4O2: xEu2+, yMn2+ phosphors were synthesized by a high-temperature solid-state method. The phase composition and crystal structure were investigated by X-ray powder diffraction and structural refinement. The as-prepared phosphors were characterized via the measurements of luminescence excitation, emission spectra and diffuse reflectance spectra and luminescence decay curves. The Sr6La4(SiO4)2(PO4)4O2:(0.01Eu2+, 0.02Mn2+) phosphor has an optimum luminescence performance. The Eu2+ and Mn2+ ions occupy two cationic sites in the oxyapatite phosphor. The results show that the phosphor can be efficiently excited by n-UV–Vis light in abroad range of 220–400 nm, exhibiting the broad emission spectra at 450–500nm, peaking at 478 nm. The Commission Internationale de L'Eclairage (CIE) chromaticity coordination of the phosphor is (0.2035, 0.3078). The doping of Mn2+promotes the absorption of phosphor to the near-ultraviolet region. The emission intensities of Sr6La4(SiO4)2(PO4)4O2: 0.01Eu2+ and Sr6La4(SiO4)2(PO4)4O2:(0.01Eu2+, 0.02Mn2+) phosphors at 150 ℃are just 34.46% and 51.79% at room temperature, respectively, indicating that the doping of Mn2+ could improve the thermal stability.

基金项目：

国家自然科学基金(51472223)；国家自然科学基金(51772278)；中央大学基础研究基金(2652015020)资助。

作者简介：

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