溶胶-凝胶法制备稀土Er^(3+)-Yb^(3+)掺杂CaTiO_3上转化绿红光材料的研究(英文)

Green and red up-conversion emissions of Er^(3+)-Yb^(3+) co-doped nano-CaTiO_3 prepared via a non-aqueous sol-gel progress

通过溶胶-凝胶法制备稀土Er3+-Yb3+掺杂CaTiO3上转化绿红光材料,以透射电子显微镜(TEM)与X射线衍射仪(XRD)为手段证明了材料的纳米结构.研究结果显示,上转化发光材料的绿光与红光,主要在520~550nm与660~680 nm且绿光是红光强度的2~3倍,当Yb3+的浓度达到3%(mol/mol)绿光是红光强的强度达到峰值.研究发现,Er3+-Yb3+掺杂CaTiO3材料,绿光与红光上转化发光过程涉及双光子,此材料是一种发光性能优异的材料.

nCTO co-doped with Er3＋-Yb3＋reveal UC have been prepared by the non-aqueous sol-gel method.It was shown from TEM and XRD observation that the nCTO compounds phases were nanostruc-ture.The green and red UC emissions centered at about 520-550 nm and 660-680 nm.The green emis-sion centered at 520-550 nm is about 2-3 times as strong as the red emission centered at 660-680 nm. When the Yb3＋doping concentration rose to 3%（mol/mol）,the intensity of the green and red emissions decreased with an increase of their intensity ratio.The two-photon absorption UC process was involved in the green and red UC emissions of the Er3＋-Yb3＋-doped nCTO excellent luminescence powders.