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Ho/Er:BaYbF5上转换材料的制备及发光性能
作者:刘旺 赵舒燕 赵倩倩 闫宇 李春 林海 刘丽娜 周艳艳 刘景和 曾繁明 
单位:长春理工大学材料科学与工程学院 光电功能材料教育部工程研究中心 长春 130022 
关键词:五氟镱钡 水热法 钬/铒 上转换发光 
分类号:O482.31
出版年,卷(期):页码:2016,44(6):853-859
DOI:10.14062/j.issn.0454-5648.2016.06.12
摘要:
利用水热法,在反应温度180 ℃保温24 h条件下合成了粒径均匀的Ho/Er:BaYbF5上转换发光材料。借助于X射线衍射、扫描电子显微镜和上转换光谱等分析了Ho/Er:BaYbF5上转换发光材料的物相结构和荧光特性。结果表明:随着pH的升高,YbF3相逐渐减小,逐渐形成BaYbF5纯相,在pH=3.0时,完全获得BaYbF5相。产物具有良好的结晶性、分散性,粒径分布均匀。在980 nm 激光二极管激发下,Ho:BaYbF5上转换发光材料发出强的绿光,对应于Ho3+的5F4(5S2)→5I8能级跃迁,Ho3+的最佳掺杂摩尔分数为3.0%;而Ho3+在最佳摩尔分数下,Er,Ho:BaYbF5上转换发光材料获得了Er–Yb–Ho的蓝光、绿光及红光发射,Er3+的最佳掺杂摩尔分数为1.5%,给出了相应的上转换发光机制。粒径均匀的Ho/Er:BaYbF5上转换发光材料在生物荧光标记等领域具有潜在的应用价值。
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The Ho3+ and Er3+ co-doped up-conversion (UC) luminescence material of BaYbF5 with the narrow particle size distribution was synthesized by a hydrothermal method at 180 ℃ for 24 h. The phase structure and fluorescence properties were investigated by X-ray diffraction, scanning electron microscopy and up-conversion spectroscopy, respectively. The results indicate that the YbF3 phase decreases with increasing the pH value, leading to the formation of a pure phase BaYbF5. BaYbF5 phaseis completely obtained at pH value of 3.0. The products show a good crystallinity, dispersion and uniform particle size distribution. Under the LD excitation at 980 nm, Ho:BaYbF5 material exhibits an intense green up-conversion emission, which corresponds to the energy transition 5F4(5S2)→5I8 of Ho3+ ions, and the optimum doping mole fraction of Ho3+ is 3.0%. Ho,Er:BaYbF5 material with the optimum doping mole fractions of Ho3+ and Er3+ (Er3+,1.5%) displays blue, green and red up-conversion emission (corresponding to Er–Yb–Ho). The possible mechanism for the corresponding up-conversion luminescence was also discussed. Ho,Er:BaYbF5 up-conversion luminescence material with the narrow particle size distribution have potential applications in biological field as luminescence probes.
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基金项目:
吉林省经济结构战略调整引导资金专项(2015Y069)和长春市科技计划(14KT023,14KP017,14GH011)资助。
作者简介:
刘 旺(1993—),男,本科生。
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