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杭州电子科技大学 材料与环境工程学院,浙江 杭州,310018
纸质出版日期:2016-3-5,
收稿日期:2015-12-6,
修回日期:2016-1-4,
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马丹阳, 丁明烨, 戴建斌等. 非稀土掺杂协同核壳包裹对氟化物纳米晶上转换发光性能的增强[J]. 发光学报, 2016,37(3): 286-293
MA Dan-yang, DING Ming-ye, DAI Jian-bin etc. Enhancment of Upconversion Luminescence of Lanthanide-doped Nanocrystals Through Non-lanthanide Ions Doping Core-shell Nanoarchitecture[J]. Chinese Journal of Luminescence, 2016,37(3): 286-293
马丹阳, 丁明烨, 戴建斌等. 非稀土掺杂协同核壳包裹对氟化物纳米晶上转换发光性能的增强[J]. 发光学报, 2016,37(3): 286-293 DOI: 10.3788/fgxb20163703.0286.
MA Dan-yang, DING Ming-ye, DAI Jian-bin etc. Enhancment of Upconversion Luminescence of Lanthanide-doped Nanocrystals Through Non-lanthanide Ions Doping Core-shell Nanoarchitecture[J]. Chinese Journal of Luminescence, 2016,37(3): 286-293 DOI: 10.3788/fgxb20163703.0286.
为提高上转换纳米晶的发光效率
提出协同增强的策略
将核壳包裹和非稀土离子掺杂两种方式进行有效的结合
使上转换纳米晶的发光效率实现"1+1
>
2"的增强效果。以NaGdF
4
作为基质材料
Yb
3+
和Er
3+
分别作为敏化离子和发光离子
以Li
+
离子和NaGdF
4
作为非稀土掺杂离子和包裹壳层来构建核/壳纳米结构
研究两种增强方式的协同作用对NaGdF
4
:Yb
3+
/Er
3+
纳米晶的上转换发光性能的影响。结果表明
Li
+
离子掺杂与包裹NaGdF
4
壳层共同作用使得-NaGdF
4
:Yb
3+
/Er
3+
纳米晶的上转换发光增强了39倍
明显优于单一方式的增强效果。通过一系列的优化实验结果发现
Li
+
离子的最佳掺杂摩尔分数为4%。基于以上实验结果
给出了非稀土离子掺杂核壳纳米晶协同增强上转换发光效率的机理。
In order to improve the luminescence efficiency of upconversion nanocrystals
a new strategy to significantly enhance upconversion emission was proposed based on coupling of non-lanthanide ions doping with the growth of an inert shell. As a proof-of-concept experiment
hexagonal NaGdF
4
:Yb
3+
/Er
3+
NaGdF
4
and Li
+
ions were chosen as luminescent core
inert shell and non-lanthanide ions
respectively. The results demonstrate that significant enhancement of 39 times from -NaGdF
4
:Yb
3+
/Er
3+
nanocrystals is clearly observed under the synergistic effect
which is larger than the sum of separate enhancement from the Li
+
doping and growth of an inert shell. By means of a series of experimental studies
the optimal doping mole fraction of Li
+
ions in the core-shell nanocrystals is found to be about 4%. Moreover
the mechanism for the luminescent enhancement of upconversion nanocrystals has been discussed.
非稀土离子掺杂核壳包裹&beta-NaGdF4:Yb3+/Er3+上转换发光
non-lanthanide ions dopingcore-shell&beta-NaGdF4:Yb3+/Er3+upconversion
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