Synthesis and luminescence enhancement of Eu3+, Sm3+ co-doped Li1.11Ta0.89Ti0.11O3 phosphor
Synthesis and luminescence enhancement of Eu3+, Sm3+ co-doped Li1.11Ta0.89Ti0.11O3 phosphor
复制标题
DOI：
10.1016/j.materresbull.2014.09.059
复制
发表时间：
2014-12
影响因子：
5.4
通讯作者：
H. Nakano;Shohei Furuya;K. Fukuda;S. Yamada
中科院分区：
文献类型：
--
作者：
H. Nakano;Shohei Furuya;K. Fukuda;S. Yamada
研究了以Li1+xTa1−xtixo3固溶体（0.05≤x≤0.25）为主体材料的荧光粉。用Eu3+活化后，红光发光荧光粉的最佳基质组成为Li1.11Ta0.89Ti0.11O3（x= 0.11）。本工作为了进一步提高发射强度，采用固相反应合成了一系列Eu3+-和Sm3+掺杂的li1.11 ta0.89 ti0.11 o3荧光粉。掺入2.5 wt% eu2o3和0.1 wt% sm2o3的荧光粉在399 nm处激发时显示出高效率的红光发射，内量子效率为98%。其PL强度为。比掺入2.5 wt% Eu3+的li1.11 ta0.89 ti0.11 o3荧光粉高出1.4倍，说明少量Sm3+起到了有效的增感剂作用。
Phosphors based on the Li1+xTa1−xTixO3solid solutions (0.05 ≤x≤ 0.25) as host materials were investigated. The optimal composition of the host for red-light emitting phosphor was found to be Li1.11Ta0.89Ti0.11O3(x= 0.11) when activated with Eu3+. In this work, in order to further enhance the emission intensity, a series of Eu3+- and Sm3+-doped Li1.11Ta0.89Ti0.11O3phosphors was synthesized by solid-state reaction. The phosphor doped with 2.5 wt% Eu2O3and 0.1 wt% Sm2O3showed the highly efficient red-light emission upon excitation at 399 nm, with the internal quantum efficiency being 98%. Its PL intensity wasca. 1.4 times higher than that of the 2.5 wt% Eu3+-doped Li1.11Ta0.89Ti0.11O3phosphor, indicating that the small amount of Sm3+acted as an effective sensitizer.