Eu^(3+)掺杂CaLaGaO_(4)红色荧光粉的制备及其荧光性能  

Preparation and fluorescence properties of Eu^(3+)⁃doped CaLaGaO_(4) red⁃emitting phosphors

作　　者：赵炎 蒋小康 李忠辉 王佳旭 周恒为 郭海[2] ZHAO Yan;JIANG Xiaokang;LI Zhonghui;WANG Jiaxu;ZHOU Hengwei;GUO Hai(Condensed Phase Transition and Microstructure Laboratory,College of Physics Science and Technology,Yili Normal University,Yining,Xinjiang 835000,China;Department of Physics,Zhejiang Normal University,Jinhua,Zhejiang 321004,China)

机构地区：[1]伊犁师范大学物理科学与技术学院,凝聚态相变与微结构实验室,伊宁835000 [2]浙江师范大学物理系,金华321004

出　　处：《无机化学学报》2024年第10期1861-1868,共8页Chinese Journal of Inorganic Chemistry

基　　金：伊犁师范大学新疆凝聚态相变与微结构实验室开放课题(No.XJDX0912Z2405);伊犁师范大学研究生科研创新项目(No.YSD2024G004)资助。

摘　　要：采用高温固相法制备不同浓度Eu^(3+)掺杂CaLaGaO_(4)系列红色荧光粉。研究结果显示,该系列荧光粉能够被392 nm的近紫外光有效激发,在609 nm处有强烈的红光发射,其光强主要依赖于Eu^(3+)的^(5)D_(0)→^(7)F_(2)跃迁所发射的光,且在Eu^(3+)浓度达到0.3时发光强度达到最大,其色坐标为(0.613,0.359),与标准红光坐标(0.670,0.330)较为接近,色纯度高达96.3%。由于热猝灭效应,当样品温度升高至498 K时,发光强度仍保持室温下的75%,激活能为0.1513 eV。A series of Eu^(3+)⁃doped CaLaGaO_(4) red⁃emitting phosphors with different concentrations were prepared via the high⁃temperature solid phase method.The results indicate that the obtained phosphors can be effectively pumped by a 392 nm near⁃ultraviolet light.The Eu^(3+)⁃doped CaLaGaO_(4) phosphor displayed the characteristic transi⁃tions of Eu3+with the strongest emission at 609 nm,originating from ^(5)D_(0)→^(7)F_(2) transition and the luminescence inten⁃sity reached its maximum when the concentration of Eu^(3+)reached 0.3.In addition,the phosphor demonstrated a remarkable color purity value of 96.3%with CIE coordinates(0.613,0.359)lying closer to the ideal red color CIE coordinates(0.670,0.330).Furthermore,the photoluminescence emission intensity maintained 75%at 498 K com⁃pared to 298 K due to the thermal quenching effect,showcasing excellent thermal stability with an activation energy of 0.1513 eV.

关 键 词：高温固相 CaLaGaO_(4) 红色荧光粉 高热稳定性 

分 类 号：TQ152[化学工程—电化学工业] TN312[电子电信—物理电子学] O611.3[理学—无机化学]