基于Mg^(2+)电荷补偿的红色荧光粉Sr_(2)Ga_(2)GeO_(7):0.02 Sm^(3+)的可控光学调谐  

Controllable Optical Tuning of Sr_(2)Ga_(2)GeO_(7):0.02Sm^(3+)Based on Charge Compensation of Mg^(2+)

作　　者：黄志 黄中胜 仇红萍 曾婷 周磊 周思琪 汲长艳 HUANG Zhi;HUANG Zhongsheng;QIU Hongping;ZENG Ting;ZHOU Lei;ZHOU Siqi;JI Changyan(National Electronic Ceramic Product Quality Supervision and Inspection Center(Hunan),Loudi 417000,Hunan,China;School of Materials and Environmental Engineering,Hunan Provincial Key Laboratory of Fine Ceramics and Powder Materials,School of Advanced Ceramics Modern Industry,Hunan University of Humanities,Science and Technology,Loudi 417000,Hunan China)

机构地区：[1]国家电子陶瓷产品质量监督检验中心(湖南),湖南娄底417000 [2]湖南人文科技学院材料与环境工程学院,精细陶瓷与粉体材料湖南省重点实验室,先进陶瓷现代产业学院,湖南娄底417000

出　　处：《中国陶瓷工业》2024年第5期1-7,共7页China Ceramic Industry

基　　金：湖南省市场监督管理局科技项目(2023KJJH34);湖南人文科技学院校重点学科建设(39223012);湖南省青年骨干教师培养(21321001);国家级、省级大学生创新创业训练计划(53122019)资助

摘　　要：为进一步改善红光荧光粉Sr_(2)Ga_(2)GeO_(7):0.02Sm^(3+)(SGGOS)的光谱性能和白光应用特性,以Mg^(2+)为电荷补偿离子对样品进行光学调谐,并通过高温固相法合成了一系列红光荧光粉Sr_(2)Ga_(2)GeO_(7):0.02Sm^(3+),x Mg^(2+)(0≤x≤0.12)。研究结果表明,Mg^(2+)可以成功引入样品SGGOS中并取代Ga^(3+),样品的晶粒尺寸约为1~10μm。荧光测试结果表明,Mg^(2+)可以增强激活离子Sm^(3+)的电荷传输效率,进而显著提升样品的荧光发射(PL)强度。此外,当Mg^(2+)的掺杂量为0.08时,样品Sr_(2)Ga_(2)GeO_(7):0.02Sm^(3+),0.08 Mg^(2+)(SGGOSM)的荧光发射强度最大。与参比样品SGGOS相比,荧光粉SGGOSM的光学带隙(E_(g))变大、色纯度提升、热稳定性增强,进而有效改善其在白光器件中的电致发光性能。基于SGGOSM为红光组分的白光器件(WLED)的显色指数(R_(a))高达90.5,色温(CCT)低至3563 K,与实验预期吻合,实现了Sm^(3+)掺杂红光荧光粉Sr_(2)Ga_(2)GeO_(7):0.02Sm^(3+)的有效光谱调控,为高R_(a)、低CCT类白光器件的研究提供了一定的实验和理论依据。To further improve the photoluminescence characteristics and white light application performance of red phosphor Sr_(2)Ga_(2)GeO_(7):0.02Sm^(3+)(SGGOS),the Mg^(2+)was used as charge compensation ion to optically tune the sample.Then a series of red phosphors Sr_(2)Ga_(2)GeO_(7):0.02Sm^(3+),x Mg^(2+)(0≤x≤0.12)were synthesized by high temperature solid phase method.The results show that Mg^(2+)can be successfully introduced into the sample SGGOS and replace Ga^(3+).In addition,the grain size of the these samples are about 1~10μm.The fluorescence test results show that Mg^(2+)can enhance the charge transport efficiency of Sm^(3+),and then significantly enhance the fluorescence emission(PL)intensity of the sample.Moreover,when the doping amount of Mg^(2+)is 0.08,the fluorescence emission intensity of Sr_(2)Ga_(2)GeO_(7):0.02Sm^(3+),0.08 Mg^(2+)(SGGOSM)is relatively the highest.Compared with the reference sample SGGOS,phosphor SGGOSM exhibits a relatively larger optical band gap(E_(g)),color purity and an en-hanced thermal stability,which effectively improves its electroluminescence performance in its white light diodes(WLED)ap-plication.As a result,the WLED device with SGGOSM as red phosphor component possessed an expressive performance with a high color rendering index(R_(a))reaching to 90.5 and a correlated color temperature(CCT),decreases to 3563 K.These results provide an important guide for developing efficient red emitting phosphor for WLED device with high Ra and low CCT.

关 键 词：电荷补偿 光学调谐 Sr_(2)Ga_(2)GeO_(7):0.02Sm^(3+) WLED 

分 类 号：TQ174.75[化学工程—陶瓷工业]