Er3+,Yb3+共掺杂NaY(WO4)2上转换荧光粉的制备及其发光性能
Preparation and Upconversion Luminescence Properties of Er3+/Yb3+ Co-doped NaY(WO4)2 Phosphors
作者单位E-mail
史忠祥 大连交通大学, 辽宁省无机超细粉体制备及应用重点实验室, 大连 116028  
卢杨 营口理工学院化材系, 营口 115014 344465621@qq.com 
王晶 大连交通大学, 辽宁省无机超细粉体制备及应用重点实验室, 大连 116028 wangjing@djtu.edu.cn 
关昕 承德石油高等专科学校化学工程系, 承德 067000  
时军 大连交通大学, 辽宁省无机超细粉体制备及应用重点实验室, 大连 116028  
江豪 大连交通大学, 辽宁省无机超细粉体制备及应用重点实验室, 大连 116028  
摘要: 应用传统水热法合成出具有四方白钨矿结构的NaY(WO42微米颗粒及一系列Er3+/Yb3+共掺杂NaY(WO42上转换荧光粉。利用XRD、SEM、TEM、HRTEM、粒度分布和上转换发光光谱对样品的物相、形貌及上转换发光性能进行分析表征。结果表明,pH值对于制备具有同一形貌的纯相NaY(WO42微米颗粒发挥重要作用。随着pH值的升高,可以完成从八面体到拟立方体再到片状颗粒的形貌转变。在980 nm近红外光激发下,观测到525及553 nm处的强绿光发射,对应Er3+2H11/24I15/24S3/24I15/2跃迁,以及650~680 nm范围内的弱红光发射,对应Er3+4F9/24I15/2跃迁,且绿、红光上转换发射均属于双光子过程。此外,通过调节NaY(WO42:Er3+,Yb3+荧光粉中Yb3+的浓度,可实现对绿光色度的有效控制。
关键词: 钨酸钇钠  水热法  Er,Yb共掺杂  上转换发光性能  双光子过程
基金项目: 国家重点研发计划项目(No.2017YFB0310300)、国家自然科学基金(No.51274052)、辽宁省自然科学基金(No.201602134)和辽宁省教育厅项目(No.JDL2016002)资助。
Abstract: NaY(WO4)2 microparticles with tetragonal scheelite structure and Er3+/Yb3+ co-doped NaY(WO4)2 phosphors were synthesized by traditional hydrothermal method. The crystal structure, morphology and up-conversion luminescence properties of the samples were discussed detailedly via XRD, SEM, TEM, HRTEM, particle size distribution and up-conversion luminescence spectrum. The results indicated that the pH values played an important role in the synthesis of pure phase NaY(WO4)2 microparticles with regular morphology. As pH value increased, the morphology of the samples could generate a transition from octahedrons, quasi-cubes to plate particles and a possible morphological formation mechanism of NaY(WO4)2 was proposed. Er3+/Yb3+ co-doped NaY(WO4)2 samples show strong green (2H11/24I15/2 (525 nm) and 4S3/24I15/2 (553 nm) of Er3+) and weak red (650~680 nm:4F9/24I15/2 of Er3+) up-conversion emission under 980 nm laser diode excitation, and the two-photon process was confirmed to be responsible for the green and red up-conversion emissions. Moreover, by adjusting the doping concentration of Yb3+ in NaY(WO4)2:Er3+,Yb3+ phosphors, the color-tunable and high-purity green were exhibited by the CIE color coordinates of NaY(WO4)2:Er3+,Yb3+ phosphors.
Keywords: NaY(WO4)2  hydrothermal method  Er,Yb co-doped  up-conversion luminescence properties  two-photon process
投稿时间:2018-06-13 修订日期:2018-07-14
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史忠祥,卢杨,王晶,关昕,时军,江豪.Er3+,Yb3+共掺杂NaY(WO4)2上转换荧光粉的制备及其发光性能[J].无机化学学报,2018,34(11):1975-1982.
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