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1. 发光学及应用国家重点实验室 中国科学院长春光学精密机械与物理研究所,吉林 长春,130033
2. 中国科学院大学 北京,100049
3. 机械科学研究总院 北京,100044
4. 吉林大学 第一临床医院,吉林 长春,130021
纸质出版日期:2015-6-3,
收稿日期:2015-3-4,
修回日期:2015-3-26,
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吴飞, 海鹰, 孔祥贵等. NaYF<sub>4</sub>:Yb<sup>3+</sup>,Er<sup>3+</sup>上转换荧光纳米体系的红光来源[J]. 发光学报, 2015,36(6): 623-627
WU Fei, HAI Ying, KONG Xiang-gui etc. Origin of Red Emission in NaYF<sub>4</sub>:Yb<sup>3+</sup>,Er<sup>3+</sup> Lanthanides Doped Upconversion Nanosystem[J]. Chinese Journal of Luminescence, 2015,36(6): 623-627
吴飞, 海鹰, 孔祥贵等. NaYF<sub>4</sub>:Yb<sup>3+</sup>,Er<sup>3+</sup>上转换荧光纳米体系的红光来源[J]. 发光学报, 2015,36(6): 623-627 DOI: 10.3788/fgxb20153606.0623.
WU Fei, HAI Ying, KONG Xiang-gui etc. Origin of Red Emission in NaYF<sub>4</sub>:Yb<sup>3+</sup>,Er<sup>3+</sup> Lanthanides Doped Upconversion Nanosystem[J]. Chinese Journal of Luminescence, 2015,36(6): 623-627 DOI: 10.3788/fgxb20153606.0623.
对NaYF
4
:Yb
3+
Er
3+
纳米材料的发光强度与激发光功率的依赖关系进行了研究
分析了NaYF
4
:Yb
3+
Er
3+
裸核纳米体系及其核包壳纳米体系的上转换红光真实来源。结果表明:核包壳的纳米体系完全不同于裸核纳米体系
交叉弛豫对于NaYF
4
:Yb
3+
Er
3+
纳米体系的上转换红光发射起主导作用
而多声子弛豫过程几乎可以忽略。这个结果对于提高上转换发光纳米材料的上转换效率、调控各发光带之间的相对强度和实现上转换发光的单色性具有重要的指导意义。
In order to research the origin of red emission in NaYF
4
:Yb
3+
Er
3+
upconversion nanoparticles
the dependence of upconversion fluorescence intensity on the excitation power was studied in this paper. The bare core and core/shell NaYF
4
:Yb
3+
Er
3+
nanoparticles were synthesized
and their emission spectra were analyzed in detail. It is found that the cross-relaxation has great influence on the red emission in NaYF
4
:Yb
3+
Er
3+
upconversion nanoparticles. Different from bare core NaYF
4
:Yb
3+
Er
3+
nanoparticles
the cross-relaxation plays a leading role for the red emission in core/shell NaYF
4
:Yb
3+
Er
3+
nanoparticles
and the multi-photon relaxation can be almost ignored.
上转换发光功率依赖交叉弛豫能级布居
upconversionexcitation power dependencecross-relaxationenergy state population
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