论文部分内容阅读
利用溶胶-凝胶法(sol-gel)分别制备了稀土铕掺杂钛酸锌和镨掺杂钛酸锌粉体,通过X射线衍射仪(XRD)、傅里叶变换红外光谱仪(FT-IR)、透射电子显微镜(TEM)以及荧光分光光度计(PL)对样品的结构、形貌及发光性能进行了表征。结果表明,Eu3+掺杂钛酸锌呈六方相偏钛酸锌,而Pr3+掺杂钛酸锌呈现六方相偏钛酸锌和立方相正钛酸锌。荧光分析表明,Eu3+浓度在0~3.0%研究范围内,其发光强度随Eu3+浓度的增加先增强后降低,最大发光强度为1.5%;Pr3+浓度在0~0.5%研究范围内,其发光强度随Pr3+浓度的增加先增强后降低,最大发光强度为0.3%,且Eu3+掺杂钛酸锌的红光发射强度远比Pr3+大。研究表明铕掺杂钛酸锌荧光粉可作为一种潜在的白光LED用红色荧光粉。
The rare-earth europium-doped zinc titanate and praseodymium-doped zinc titanate powders were prepared by sol-gel method and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy ), Transmission electron microscopy (TEM) and fluorescence spectrophotometer (PL) were used to characterize the structure, morphology and luminescent properties of the samples. The results show that the Eu3 + doped zinc titanate is hexagonal phase zinc titanate, while the Pr3 + doped zinc titanate exhibits hexagonal phase zinc titanate and cubic phase zinc titanate. Fluorescence analysis showed that the luminescence intensity of Eu3 + first increased and then decreased with the increase of Eu3 + concentration in the range of 0-3.0%, and the maximum luminescence intensity was 1.5%. With the concentration of Pr3 + in the range of 0-0.5%, the luminescence intensity Pr3 + concentration increased first and then decreased, the maximum luminous intensity was 0.3%, and Eu3 + doped zinc titanate red emission intensity is much larger than Pr3 +. Studies have shown that europium doped zinc titanate phosphor can be used as a potential white LED red phosphor.