硅酸盐学报2018，Vol.46Issue(1)：128-135,8.DOI:10.14062/j.issn.0454-5648.2018.01.17
Li+掺杂对(ScLu)VO4:Eu3+红色荧光粉结构及发光性能的影响
Structure and Luminescence Properties of Li+-doped (ScLu)VO4:Eu3+ Red Phosphors
摘要
Abstract
A series of Li+-doped (ScLu)VO4:Eu3+ phosphors were synthesized via solid-state reaction. The structure, morphology and luminescence properties of the samples were characterized. The results show that the Li+-doped samples maintain a body-centered tetragonal structure of (ScLu)VO4:Eu3+. The Li+ ions are introduced into the host lattice through substitutional doping or interstitial doping. The agglomeration minimizes, and the impurities (i.e., OH- and CO32-) with a higher phonon energy reduce after adding the appropriate amount of Li+ ions to the sample, thereby giving rise to a reduction in the quenching centers and an increase in the emission intensity. The excitation spectra of the samples show a broad band at 200-500 nm, and an intense red emission (centered at 620 nm) appears under the excitation of 330 nm, which can be attributed to 5D0→7F2 transitions. The emission intensity can be enhanced when Li+ ions are introduced to (ScLu)VO4:Eu3+. The decay curve of the 5D0 state of the as-prepared samples displays a single-order exponential behavior, i.e., the lifetime of 5D0 first increases and then decreases with the increase of Li+ doping concentration. The emission intensity of Sc0.82Lu0.05VO4:Eu3+0.07, Li+0.06 is 73% of the initial value at 25 °C when the temperature increases to 200 °C.关键词
白光LED/发光/锂离子掺杂/高温固相法/晶体场对称性Key words
white LEDs/luminescence/lithium ion doped/solid state reaction/crystal field symmetry分类
物理学引用本文复制引用
吴迪,叶信宇,刘松彬,杨新华,谢世勇,刘帆..Li+掺杂对(ScLu)VO4:Eu3+红色荧光粉结构及发光性能的影响[J].硅酸盐学报,2018,46(1):128-135,8.基金项目
国家自然科学基金(51304086) （51304086）
江西省杰出青年人才资助计划人选(20171BCB23064) （20171BCB23064）
江西理工大学清江青年英才支持计划人选资助项目. （）
