Pump-power tunable white upconversion emission in lanthanide-doped hexagonal NaYF4 nanorods

Pump-power tunable white upconversion emission in lanthanide-doped hexagonal NaYF4 nanorods
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稀土掺杂六方 NaYF4 纳米棒中泵浦功率可调的白光上转换发射

DOI:
10.1016/j.optmat.2011.01.016
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发表时间:
2011-04
期刊:
Opt. Mater.
影响因子:
--
通讯作者:
L. W. Yang
L. W. Yang
中科院分区:
其他
文献类型:
--
作者:
P. K. Chu;C. Q. Sun;Y. Y. Zhang;J. X. Zhong;J. J. Li;L. W. Yang

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报道了水热法合成的镧系元素掺杂六角NaYF 4纳米棒在980 nm半导体激光器激发下的可调谐白色上转换(UC)发射。计算得到的色坐标表明,Yb 3 +-Ho 3 +-Tm 3+和Yb 3 +-Er 3 +-Tm 3+三倍频系统的UC白色输出在很宽的泵浦功率密度范围内都可以进行微调,但各有优势。前者对于白色发射具有更宽的泵浦功率密度响应范围,并且可以更精确地调节模拟的白色输出;而后者在相同的泵浦功率密度下具有更宽的白色输出范围。这些优异的性能使得六方掺杂的NaYF 4纳米结构在小型化固态光源、三维显示器件、光学传感器以及生物探针和生物成像标记等方面具有广阔的应用前景。
Pump-power tunable white upconversion (UC) emission under the excitation of a 980nm laser diode from lanthanide-doped hexagonal NaYF4nanorods synthesized by a hydrothermal method is reported. The calculated color coordinates reveal that the UC white color output from both the Yb3+–Ho3+–Tm3+and Yb3+–Er3+–Tm3+triply-doped systems can be fine-tuned for a wide range of pump-power densities, but each has its own superiority. The former has a broader response scope to pump-power densities for white emission and the simulated white color output can be tuned more precisely, whereas the latter has a much broader range of white color output under the same pump-power densities. These desirable properties make these Ln3+doped hexagonal NaYF4nanostructures promising in applications such as miniaturized solid-state light sources, multicolor three-dimensional display devices, optical processing sensors and multicolor labels for bioprobe and bioimaging.
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