Crystallographic sites of Eu2+ and Eu2+-Tb3+ energy transfer in Sr2LiSiO4F
Crystallographic sites of Eu2+ and Eu2+-Tb3+ energy transfer in Sr2LiSiO4F
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Sr2LiSiO4F 中 Eu2 和 Eu2-Tb3 能量转移的晶位
DOI：
10.1039/c5ra00585j
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发表时间：
2015
期刊：
影响因子：
3.9
通讯作者：
Dongyu Li
中科院分区：
文献类型：
--
作者：
Mubiao Xie;Guoxian Zhu;Dongyu Li
采用高温固相反应法制备了Eu 2+单掺Sr 2LiSiO 4F：xEu 2+和Eu 2 +-Tb 3+共掺Sr 2LiSiO 4F：0.06Eu2+，xTb 3+荧光粉。Sr 2LiSiO 4F：xEu 2+的光致发光光谱表明，Eu 2+离子同时进入Sr 2LiSiO 4F基质的Sr 1和Sr 2位。随着Eu ~（2+）含量的增加，Sr_2LiSiO_4F：xEu ~（2+）的PL谱带在475 ~ 520 nm之间有逐渐红移的趋势。共掺杂Sr_2LiSiO_4F：0.06Eu ~（2+），xTb ~（3+）的光致发光谱和发光衰减表明，Eu ~（2+）与Tb ~（3+）之间发生了非辐射能量转移。
Eu2+ single doped phosphors Sr2LiSiO4F:xEu2+ and Eu2+–Tb3+ co-doped phosphors Sr2LiSiO4F:0.06Eu2+,xTb3+ were prepared by a conventional high temperature solid state reaction technique. The photoluminescence spectra of Sr2LiSiO4F:xEu2+ show that Eu2+ ions enter both Sr1 and Sr2 sites in the Sr2LiSiO4F host. The PL emission bands of Sr2LiSiO4F:xEu2+ show a red-shift tendency gradually from 475 to 520 nm with increasing Eu2+ content. The photoluminescence spectra as well as the luminescence decays of the co-doped phosphors Sr2LiSiO4F:0.06Eu2+,xTb3+ show that non-radiative energy transfer from Eu2+ to Tb3+ occurs.