发光学报, 2018, 39 (10): 1385, 网络出版: 2018-11-25
阴离子取代合成Sr3LaAxV3-xO12∶Eu3+(A=Mo,W)白光荧光粉
Synthesis of Sr3LaAxV3-xO12∶Eu3+ (A=Mo, W) White Phosphor by Anion Substitution
钒酸盐荧光粉 阴离子掺杂 Eu3+发光性能 白光荧光粉 vanadate phosphor anion substitution luminescence of Eu3+ white phosphor
摘要
通过高温固相法合成Sr3LaAxV3-xO12∶Eu3+(A=Mo,W) 荧光粉, 利用MoO2-4和WO2-4取代基质中部分VO3-4, 改变基质组成和结构, 进而影响基质和激活剂Eu3+离子的发光性能。采用 X 射线衍射(XRD)、扫描电子显微镜(SEM)和荧光分光光度计对所合成样品的物相、形貌、荧光性能及荧光寿命进行表征。研究表明, MoO2-4和WO2-4的部分掺杂对基质发光位置和强度均有影响, 能明显减弱VO3-4的发光, 但对Eu3+离子发光影响不大, 添加电荷补偿剂F-可以加强VO3-4对Eu3+离子的能量传递。通过调整基质VO3-4发光和Eu3+离子发光, 可以得到单一基质的白光荧光粉。初步探讨了阴离子掺杂对Eu3+离子红光发射增强的机理。
Abstract
Sr3LaAxV3-xO12∶Eu3+ (A=Mo, W) phosphors were synthesized by a high temperature solid state method. X-ray diffraction(XRD), scanning electron microscopy(SEM), photoluminescence spectra, and lifetime were utilized to characterize the samples. Partial substitution of VO3-4 by MoO2-4 and WO2-4 in Sr3LaAxV3-xO12∶Eu3+ (A=Mo, W) can weaken the emission of VO3-4, and cause a red shift of emission position, but has little influence on the emission of Eu3+ ion. After charge compensation by adding F- in Sr3LaMoxFxV3-xO12∶Eu3+, the excitation energy of VO3-4 can be transferred to Eu3+ ion and then enhance the emission of Eu3+ ion. A white phosphor of Sr3LaAxV3-xO12∶Eu3+ (A=Mo, W) can be obtained by adjusting the emissions of the VO3-4 and Eu3+ ions. The enhancement mechanism of the red emission of Eu3+ by anion substitution was briefly discussed.
杨国辉, 王小军, 陈彩花, 梁利芳, 蒙丽丽, 张丽霞. 阴离子取代合成Sr3LaAxV3-xO12∶Eu3+(A=Mo,W)白光荧光粉[J]. 发光学报, 2018, 39(10): 1385. YANG Guo-hui, WANG Xiao-jun, CHEN Cai-hua, LIANG Li-fang, MENG Li-li, ZHANG Li-xia. Synthesis of Sr3LaAxV3-xO12∶Eu3+ (A=Mo, W) White Phosphor by Anion Substitution[J]. Chinese Journal of Luminescence, 2018, 39(10): 1385.
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