| TiO2对ZnO/ZnS:Eu3+荧光粉发光性能的影响 |
| Effect of TiO2 on Luminescent Properties of ZnO/ZnS:Eu3+ Phosphor |
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| 摘要: 采用溶胶-凝胶-沉淀法制备ZnO/ZnS/2TiO2：Eu3+荧光粉，并采用X射线衍射（XRD）、红外光谱（IR）、透射电镜（TEM）以及荧光光谱技术对其结构、组成、形貌和发光性能进行表征，探讨其发光机理。结果显示，ZnO/ZnS/2TiO2：Eu3+荧光粉的结构在温度高于600℃时趋于稳定状态，呈不规则结构，由ZnO、TiO2和ZnS构成。IR谱图表明，Ti—O—Ti桥氧键网络结构有利于Eu3+之间的能量传递。荧光光谱分析表明，引入TiO2使Eu3+光谱选律禁阻解除，提高了ZnO/ZnS/2TiO2：Eu3+荧光粉的发光性能，且当nZn（NO3）2：nTiO2=1：2时荧光粉的发光性能最好，612 nm处的5D0→7F2电偶极跃迁为最强发射峰，最佳退火温度为600℃。 |
| 关键词: 溶胶-凝胶-沉淀 Eu3+掺杂ZnO/ZnS/2TiO2 发光性能 发光机理 |
| 基金项目: 内蒙古自治区高等学校科学研究项目（No.NJZY13046）、内蒙古师范大学“十百千”人才工程第二层次人选（学科带头人）研究基金项目（No.RCPY-2-2012-K-046）和国家自然科学基金资助项目（No.21261010）。 |
| Abstract: ZnO/ZnS/2TiO2:Eu3+ phosphor was prepared by sol-gel-precipitation method. The structure, composition, morphology and luminescent properties were characterized by used X-ray diffraction (XRD), infrared spectroscopy (IR), transmission electron microscope (TEM) and fluorescence spectrum. The mechanism of luminescence was investigated. The results showed that phosphor changed into a stable structure when the temperature was above 600℃, and structure of the irregular shape. The phosphor mainly composed of ZnO, TiO2 and ZnS. IR spectra show that the structure of Ti-O-Ti bridge oxygen bond network is conducive to pass energy among the Eu3+. Fluorescence spectra show that the addition of TiO2 can remove the inhibition of Eu3+ spectral melody and improve the luminescence properties of phosphor. And the best luminescence performance was obtained in the phosphor prepared with nZn(NO3)2:nTiO2=1:2. The strongest emission peak was 5D0→7F2 electric dipole transition at 612 nm, and the optimum annealing temperature was 600℃. |
| Keywords: sol-gel-precipitation Eu3+ doped ZnO/ZnS/2TiO2 luminescent properties luminescent mechanism |
| 投稿时间：2020-07-07 修订日期：2021-01-13 |
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| 张岚,王喜贵.TiO2对ZnO/ZnS:Eu3+荧光粉发光性能的影响[J].无机化学学报,2021,37(4):601-607. |
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