Enhancing upconverted white light in Tm3+/Yb3+/Ho3+-doped GdVO4 nanocrystals via incorporation of Li+ ions.
Enhancing upconverted white light in Tm3+/Yb3+/Ho3+-doped GdVO4 nanocrystals via incorporation of Li+ ions.
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DOI：
10.1364/oe.20.000111
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发表时间：
2012-01
期刊：
影响因子：
3.8
通讯作者：
Venkataramanan Mahalingam;R. Naccache;F. Vetrone;J. Capobianco
中科院分区：
文献类型：
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作者：
Venkataramanan Mahalingam;R. Naccache;F. Vetrone;J. Capobianco
研究了Tm3+/Yb3+/Ho3+掺杂的GdVO4纳米晶体在近红外光（λexc = 980 nm）激发下，通过多光子上转换过程发射白光。来自Tm3+离子的上转换蓝色发射以及来自Ho3+离子的绿色/红色发射贡献了观测到的白光。计算得到的国际委员会（CIE）颜色坐标计算为x = 0.34；Y = 0.32，位于白色区域的中心。此外，一价Li+离子掺入GdVO4基体后，上转换白光的强度增强。基于x射线衍射和荧光寿命测量，提出了这种增强的解释。
The white light emission of Tm3+/Yb3+/Ho3+-doped GdVO4 nanocrystals, following excitation with near-infrared light (λexc = 980 nm), via a multiphoton upconversion process is presented. Upconverted blue emission from the Tm3+ ions as well as green/red emissions from the Ho3+ ions contributes to the observed white light. The calculated Commission internationale de l'éclairage (CIE) color coordinates were calculated to be x = 0.34; y = 0.32 and lie at the center of the white region. Furthermore, the intensity of the upconverted white light was enhanced by the incorporation of monovalent Li+ ions into the GdVO4 matrix. An explanation for this enhancement is proposed based on X-ray diffraction and fluorescence lifetime measurements.