TiO_(2)对ZnO/ZnS:Eu^(3+)荧光粉发光性能的影响  

Effect of TiO_(2)on Luminescent Properties of ZnO/ZnS:Eu^(3+)Phosphor

作　　者：张岚 王喜贵[2] ZHANG Lan;WANG Xi‑Gui(Wulanchabu Medical College,Wulanchabu,Inner Mongolia 012000,China;Inner Mongolia Normal University,College of Chemistry and Environment Science,Hohhot 010022,China)

机构地区：[1]乌兰察布医学高等专科学校,乌兰察布012000 [2]内蒙古师范大学化学与环境科学学院,呼和浩特010022

出　　处：《无机化学学报》2021年第4期601-607,共7页Chinese Journal of Inorganic Chemistry

基　　金：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);国家自然科学基金资助项目(No.21261010)。

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℃。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 ℃.

关 键 词：溶胶-凝胶-沉淀 Eu3+掺杂ZnO/ZnS/2TiO2 发光性能 发光机理 

分 类 号：O614.331[理学—无机化学]