摘要
采用高温固相反应法制备了系列的Ag, Tb^3+单掺和共掺CaSrSiO4纳米荧光粉。XRD和SEM分析结果表明, Tb^3+和Ag颗粒的掺入对纳米粉末晶体结构的影响较弱,但CaSrSiO4:0.7Tb^3+,0.1Ag样品呈现了立方体结构,且颗粒尺寸明显增大。XPS结果显示Ag单质和Ag^+共存于荧光粉中。在243 nm激发下,同时观测到强的545, 415和381 nm的光致发光谱,以及较弱的437, 586和624 nm发光峰。掺入0.1%(摩尔分数)Ag纳米颗粒时,能够使CaSrSiO4:0.7Tb^3+纳米荧光粉的光致发光强度增强25%。最后讨论了掺Ag颗粒浓度对Tb^3+的545和381 nm特征峰衰减曲线的影响。
A series of Ag, Tb^3+ single-doped and co-doped CaSrSiO4 nanophosphors were prepared by the high temperature solid-state reaction method. The analysis results of XRD and SEM showed that the influence of incorporating Tb^3+ ions or Ag particles in the matrix on the crystal structure of nanopowder is relatively weak, however, the sample of CaSrSiO4:0.7 Tb^3+,0.1 Ag takes on the cube structure and its grain size becomes clearly large. XPS result showed that both Ag element and its ionic form coexist in phosphors. Under the excitation of 243 nm ultraviolet, the strong 545, 415 and 381 nm photoluminescence spectra as well as the weak 437, 586 and 624 nm emission peaks can be observed simultaneously. The PL intensity of CaSrSiO4:0.7 Tb^3+nanophosphor can be enhanced 25% when 0.1% Ag nanoparticles are codoped. Finally, the effect of Ag doping concentration on the decay curves of 545 and 381 nm characteristic peaks of Tb^3+ ion is discussed.
作者
王瀚槿
陈永杰
张伟炜
洪远志
李成仁
Wang Hanjin;Chen Yongjie;Zhang Weiwei;Hong Yuanzhi;Li Chengren(School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China)
出处
《中国稀土学报》
CAS
CSCD
北大核心
2019年第3期291-297,I0002,共8页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金项目(11004092)
辽宁省科技厅项目(201602455)
教育厅项目(L201683665)资助
