Ba2YAlO5∶Eu^3+,Na^+荧光粉的合成和光致发光性能研究  

Synthesis and Photoluminescence Properties of Ba2YAlO5∶Eu^3+,Na^+ Phosphor

作　　者：段欢 崔瑞瑞 邓朝勇 DUAN Huan;CUI Ruirui;DENG Chaoyong(Key Laboratory of Electronic Composites of Guizhou Province,College of Big Data and Information Engineering,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学大数据与信息工程学院,贵州省电子功能复合材料特色重点实验室,贵阳550025

出　　处：《人工晶体学报》2020年第12期2302-2307,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51762010);贵州省高层次创新人才(黔科合人才[2015]4006号);贵州省科技计划(黔科合平台人才[2018]5781号)。

摘　　要：本文采用高温固相法成功合成了一系列Ba2YAlO5∶0.2Eu^3+,x Na^+(x=0.01,0.03,0.05,0.10,0.20,0.30)荧光粉,研究了Eu^3+,Na^+掺杂对晶体结构的影响。使用扫描电子显微镜观察荧光材料的微观形貌,使用荧光光谱仪对荧光粉的激发和发射光学特性进行观测和分析,从理论上研究了浓度猝灭和能量传递现象。在613 nm监测波段下,激发光谱在270~290 nm处出现O 2-→Eu^3+电荷转移带,395 nm和465 nm处出现峰值,在465 nm处峰值最大,对应于7F 0→5D2跃迁。在465 nm监测波长下,观察到在613 nm处发射峰最强,对应于5D 0→7F2跃迁,钠离子最优掺杂浓度为x=0.03。通过理论计算得出基质中的能量传递在最近邻离子之间。对发光材料进行热稳定性测试和分析,计算得到热猝灭激活能的值为0.058 eV,计算出Ba2YAlO5∶0.2Eu^3+,0.03 Na^+荧光粉的色坐标位于(0.61,0.39),非常接近于国际照明委员会规定的标准色坐标(0.67,0.33)。A series of Ba2YAlO5∶0.2Eu^3+,x Na^+(x=0.01,0.03,0.05,0.10,0.20,0.30)phosphors were synthesized successfully by high temperature solid phase method.The effect of Eu^3+,Na^+doping on the crystal structure was studied.Observe the morphology of fluorescent materials with scanning electron microscope.The excitation and emission optical properties of phosphors were observed and analyzed by fluorescence spectrometer.Conducted theoretical research on concentration quenching and energy transfer.Under 613 nm emission,O2-→Eu^3+charge transfer band appears at 270 nm to 290 nm,peaks appear at 395 nm and 465 nm,the peak at 465 nm is the highest,corresponding to the 7F0→5D2 transition.Under 465 nm excitation,it is observed that emission peak is the strongest at 613 nm,corresponding to the 5D0→7F2 transition,and the optimal doping concentration of sodium ion is x=0.03.Theoretical calculation verified that the energy transfer in the host material is between the nearest neighbor ions.Thermal stability test analysis of the luminescent material show that activation energy of thermal quenching is 0.058 eV,and color coordinates of Ba2YAlO5∶0.2Eu^3+,0.03 Na^+phosphors are calculated locate in(0.61,0.39),which is very close to the standard chromaticity coordinates(0.67,0.33)stipulated by the International Commission on Lighting.

关 键 词：荧光粉 高温固相 光致发光 浓度猝灭 能量传递 热稳定性 色坐标 

分 类 号：O734[理学—晶体学]