Effects of local structure of Ce(3+) ions on luminescent properties of Y3Al5O12:Ce nanoparticles.
Effects of local structure of Ce(3+) ions on luminescent properties of Y3Al5O12:Ce nanoparticles.
复制标题
CE（3+）离子局部结构对Y3AL5O12：CE纳米颗粒的发光特性的影响。
DOI：
10.1038/srep22238
复制
发表时间：
2016-03-03
影响因子：
4.6
通讯作者：
Yu R
中科院分区：
文献类型：
--
作者：
He X;Liu X;Li R;Yang B;Yu K;Zeng M;Yu R
采用溶胶-凝胶法成功制备了Ce 3+掺杂的钇铝石榴石（YAG：Ce）纳米晶。采用多种表征技术研究了YAG：Ce纳米荧光粉的结构、形貌、组成和光致发光性能。在1030 °C烧结的YAG：Ce0.0055样品具有典型的5d 1 - 4f 1发射带，最大发射峰位于525 nm，荧光寿命τ1短（~28 ns），τ2长（~94 ns）。煅烧温度和Ce 3+掺杂浓度对YAG：Ce纳米荧光粉的发光性能有显著影响。在830 ~ 1030 °C范围内，随着煅烧温度的升高，样品的发光强度增强，但随着Ce ~（3+）掺杂浓度的增加，样品的发光强度急剧下降由于浓度猝灭。通过优化合成条件，在1030 °C，Ce 3+浓度为0.55at.%时，样品的光致发光强度最强。
Ce3+-doped yttrium aluminum garnet (YAG:Ce) nanocrystals were successfully synthesized via a facile sol-gel method. Multiple characterization techniques were employed to study the structure, morphology, composition and photoluminescence properties of YAG:Ce nanophosphors. The YAG:Ce0.0055 sintered at 1030 °C exhibited a typical 5d1-4f1 emission band with the maximum peak located at 525 nm, and owned a short fluorescence lifetime τ1 (~28 ns) and a long fluorescence lifetime τ2 (~94 ns). Calcination temperature and Ce3+ doping concentration have significant effects on the photoluminescence properties of the YAG:Ce nanophosphors. The emission intensity was enhanced as the calcination temperature increased from 830 to 1030 °C, but decreased dramatically with the increase of Ce3+ doping concentration from 0.55 to 5.50 at.% due to the concentration quenching. By optimizing the synthesized condition, the strongest photoluminescence emission intensity was achieved at 1030 °C with Ce3+ concentration of 0.55 at.%.