XIE Xuan, WU Fei, LI Qi-qing etc. Effects of Yb<sup>3+</sup> in Shell on Temperature Dependent Upconversion Luminescence of NaYF<sub>4</sub>:Yb<sup>3+</sup>,Er<sup>3+</sup>@NaYF<sub>4</sub>:<em>x</em>%Yb<sup>3+</sup> Core/ Shell Nanostructures[J]. Chinese Journal of Luminescence, 2015,36(12): 1390-1395
XIE Xuan, WU Fei, LI Qi-qing etc. Effects of Yb<sup>3+</sup> in Shell on Temperature Dependent Upconversion Luminescence of NaYF<sub>4</sub>:Yb<sup>3+</sup>,Er<sup>3+</sup>@NaYF<sub>4</sub>:<em>x</em>%Yb<sup>3+</sup> Core/ Shell Nanostructures[J]. Chinese Journal of Luminescence, 2015,36(12): 1390-1395 DOI: 10.3788/fgxb20153612.1390.
60) nanoparticles were synthesized through thermolysis in oleic acid and 1-octadecene. The upconversion luminescence of these core/shell nanostructures was explored at different temperatures (90-450 K). The results demonstrate that the emission at 525 nm(
2
H
11/2
4
I
15/2
) of core/inert-shell nanoparticles exhibites a different growth from that of core/active-shell nanoparticles. The upconversion emissions of Yb
3+
-doped-active-shell nanoparticles are more easily affected by phonons than those nanoparticles coated with inert layer. Yb
3+
ions in the shell paly an important role of bridging the iner and outer factors to influence upconversion emission.
关键词
上转换温度依赖能级布居稀土
Keywords
upconversiontemperature dependenceenergy state populationrare earth
references
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