摘要
采用高温固相法合成了Mn^(4+)激活的La_(2)MgTi_(1-x)O_(6):xMn^(4+)红色荧光粉,利用X射线衍射、扫描电镜和荧光光谱等表征手段对荧光粉的物相结构和发光性能进行了分析。研究结果表明,Mn^(4+)成功进入到La_(2)MgTiO_(6)的晶体结构;荧光粉的激发光谱在250~550 nm范围内存在较强的吸收,在650~750 nm的范围内有较强烈的红光发射,归属于Mn^(4+)离子的^(2)E_(g)→^(4)A_(2g)能级跃迁,在Mn^(4+)浓度为0.008时,发光强度最大;La_(2)MgTi_(1-x)O_(6):xMn^(4+)红光荧光粉可以作为一种有潜力的红色荧光粉应用于植物照明LED中。
Mn^(4+) activated La_(2)MgTi_(1-x)O_(6):xMn^(4+) red phosphor was synthesized by high temperature solid-state reaction.The phase structure and luminescence properties of the phosphor were characterized by X-ray diffraction,scanning electron microscope and fluorescence spectrum.The results showed that Mn^(4+) successfully entered the crystal structure of La_(2)MgTiO_(6).The excitation spectrum of the phosphor showed strong absorption in the range of 250~550 nm.Strong red light emission in the range of 650~750 nm was attributed to ^(2)E_(g)→^(4)A_(2g) energy level transition of Mn^(4+) ions.When the concentration of Mn^(4+) was 0.008,the luminescence intensity reached the maximum.La_(2)MgTi_(1-x)O_(6):xMn^(4+) red phosphor can be used as a potential red phosphor in plant lighting LED.
作者
罗嘉诚
王延惠
王维昊
李玉玲
廖佳杰
LUO Jia-cheng;WANG Yan-hui;WANG Wei-hao;LI Yu-ling;LIAO Jia-jie(College of Chemistry and Materials Science,Guangdong University of Education,Guangdong Guangzhou 510800,China)
出处
《广州化工》
CAS
2022年第15期78-81,共4页
GuangZhou Chemical Industry
基金
2020年广东大学生科技创新培育专项资金项目(“攀登计划”专项资金)(No:pdjh2020b0427)
广东省2021年度大学生创新创业训练计划项目(No:S202114278027,No:S202114278011)
广州市科技计划项目(No:202102020458)
广东第二师范学院博士科研专项经费研究项目(No:2016ARF01)。
关键词
红色荧光粉
双钙钛矿
Mn^(4+)
高温固相法
red phosphor
double perovskites
Mn^(4+)
high temperature solid-state reaction
作者简介
第一作者:罗嘉诚(1999-),男,学士,主要从事过渡金属发光材料的研究;通讯作者:王延惠(1987-),女,博士,讲师,主要从事稀土发光材料和过渡金属发光材料的研究。
