Xing Lili, Yang Weiqi, Lin Jincheng, Huang Mei, Xue Yuqi
Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, P. R. China.
Zhuhai Campus Experimental Teaching Center, Sun Yat-sen University, Zhuhai, 519082, P. R. China.
Sci Rep. 2017 Nov 7;7(1):14725. doi: 10.1038/s41598-017-15367-9.
A strategy to enhance the upconversion white-light intensity via Mg ion doping was demonstrated in Ho/Yb/Tm/LiNbO single crystal. It is found Mg ion doping affects the crystal field symmetry around RE ions and enhance the upconversion emission intensity. Bright white-light is obtained when the Mg ion concentration is 0.5 mol% in the melt. And the CIE coordinates are hardly changed with Mg ion doping. In addition, the upconversion mechanism is discussed in detail. It is observed the longer lifetimes of intermediate levels result in the lower upconversion photon numbers, which are beneficial to the upconversion process. Therefore, Mg ion doped Ho/Yb/Tm/LiNbO single crystals would have potential applications in stable white-light devices and photoelectric instruments.
在Ho/Yb/Tm/LiNbO单晶中展示了一种通过Mg离子掺杂提高上转换白光强度的策略。发现Mg离子掺杂会影响稀土离子周围的晶体场对称性并增强上转换发射强度。当熔体中Mg离子浓度为0.5 mol%时可获得明亮的白光。并且CIE坐标几乎不会因Mg离子掺杂而改变。此外，还详细讨论了上转换机制。观察到中间能级的较长寿命导致较低的上转换光子数，这有利于上转换过程。因此，Mg离子掺杂的Ho/Yb/Tm/LiNbO单晶在稳定的白光器件和光电仪器中具有潜在应用。
