摘要
利用溶剂热法获得前驱体,结合热处理合成Eu^3+掺杂单分散Y2O3微球荧光粉。通过X射线衍射仪、扫描电子显微镜、荧光分析仪对样品的晶体结构、微观形貌及荧光性能进行了表征与分析。结果表明:制备的样品均为立方相Y2 O3微球结构,尺寸均一、粒径大小为2μm左右;Eu^3+掺杂的样品在239 nm紫外光的激发下,展示出强烈的红光发射,该发射峰位于612 nm附近,源于Eu^3+的5 D0→7 F2跃迁;随着Eu^3+掺杂浓度的递增,该发光峰呈现出先增强后减弱的趋势,其最佳掺杂浓度为5%(摩尔分数);此外,随着热处理温度逐渐升高,样品的结晶性增强,荧光随之增强;Y2 O3∶5%Eu^3+荧光粉的色坐标为(0.583,0.335),接近NTSC标准(美国国家电视系统委员会)红光色坐标(0.670,0.330)。
Precursors were obtained by solvothermal method.And phosphors of monodisperse Eu^3+doped Y2O3 microsphere were synthesized by solvent thermal method and heat treatment.The crystal structure,microstructure and fluorescence properties were characterized by X-ray diffraction,scanning electron microscopy and fluorescence spectrophotometer.The results show that the assynthesized samples are 2μm monodisperse cubic Y2O3 microspheres.The samples exhibit strong red emission at 612 nm under the excitation of 239 nm ultraviolet light,which is corresponding to the 5 D0→7 F2 transition of Eu^3+ions.The luminescence intensity increases and then decreases as Eu3+doping concentration increases with maximum intensity at 5%doping concentration(mole fraction).In addition,at higher heat treatment temperature,the crystallinity of samples was improved,resulting in higher fluorescence.The coordinate of the Y2 O3∶5%Eu^3+phosphor was located at(0.583,0.335),which is close to the NTSC standard values of(0.670,0.330).
作者
梁进闯
蒋小康
周恒为
LIANG Jinchuang;JIANG Xiaokang;ZHOU Hengwei(Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matter Physics,College of Physical Science and Technology,Yili Normal University,Yining 835000,Xinjiang Uygur Autonomous Region,China)
出处
《电子元件与材料》
CAS
CSCD
北大核心
2020年第4期29-33,共5页
Electronic Components And Materials
基金
新疆维吾尔自治区高校科研计划(XJEDU2017S049)。
关键词
溶剂热法
Eu3+掺杂
单分散
荧光性能
solvothermal method
Eu3+doped
monodisperse
fluorescence properties
