Eu^(3+)掺杂2ZnO·2.2B_2O_3·3H_2O红色荧光粉的发光性能  

Luminescent Properties of Eu^(3+)-doped 2ZnO·2.2B_2O_3·3H_2O

作　　者：乐天[1,2] 曾庆光[1] 张梅[1] 黄天[1] 颜强望[1] 王忆[1] 

机构地区：[1]五邑大学应用物理与材料学院,广东江门529020 [2]五邑大学化学与环境工程学院,广东江门529020

出　　处：《发光学报》2011年第7期709-714,共6页Chinese Journal of Luminescence

基　　金：国家自然科学基金(11004153);广东省自然科学基金(10152902001000009);广东省科技计划(2009B030803015);2008年五邑大学重点科研基金(五邑大学校科字[2009]1号)资助项目

摘　　要：采用水热法合成2ZnO.2.2B2O3.3H2O∶Eu3+红色荧光粉。其形貌、结构和光学性能分别用扫描电镜、X射线衍射和荧光光谱进行表征。扫描电镜图片显示样品的尺寸分布在0.1~1μm范围内。随着Eu3+掺杂浓度的升高,样品向无定形的玻璃态转变。当激发波长为253 nm(属于Eu3+-O2-电荷迁移带吸收)时,样品中Eu3+的发光强度远远强于用394 nm激发的;当掺杂量增大到24%[n(Eu3+)∶n(Zn2+)=24%]时,出现浓度猝灭效应。随着样品退火温度的升高,样品逐渐变成为无定形的玻璃态。当样品的退火温度升高至400℃时,Eu3+的发光强度减弱,与此同时出现了一个新的宽发射峰(峰位在470 nm,对应于Eu2+的发射峰),说明在此温度下部分Eu3+被还原成Eu2+。Eu3＋ doped 2ZnO·2.2B2O3·3H2O,was synthesized by hydrothermal method.The morphology,crystal phase and luminescent properties of the sample were characterized by scanning electronic microscopy（SEM）,X-ray diffraction（XRD） and fluorescence spectra,respectively.The SEM image shows the particle size of the as-prepared powder is ranged from 0.1 to 1 μm.The crystal phase of the as-prepared powder is toward to glass state with the increasing of Eu3＋ content.The fluorescence spectra of Eu3＋-doped 2ZnO·2.2B2O3·3H2O reveals that the emission intensity of Eu3＋ excited by 253 nm（corresponding to the charge transfer band of Eu3＋-O2-） is much stronger than it excited by 394 nm.The optimism doping concentration is 24% [n（Eu3＋）∶n（Zn2＋）=24%].When the annealing temperature is increased up to 400 ℃,decrease in the emission intensity of Eu3＋ and appearance of a new fluorescence peak（the peak position at 470 nm） assigned to the emission of Eu2＋ is observed.

关 键 词：水热法 硼酸锌 发光 

分 类 号：O482.31[理学—固体物理]