Conversion of ultraviolet and infrared to visible light in Er<sup>3+sup> and Dy<sup>3+sup> co-doped CsGd<sub>2sub>F<sub>7sub>
- 作者：B.G. You ; X.T. Wei ; Y.H. Chen ; M. Yin <sup>yinmin@ustc.edu.cnsup> ; C.K. Duan<sup> ; sup><sup>duanck73@hotmail.comsup><sup> ; sup><sup>ckduan@ustc.edu.cnsup>
- 关键词：CsGd2F7 crystal ; Lanthanide ions ; Quantum cutting ; VUV ; Upconversion
- 刊名：Journal of Luminescence
- 出版年：2012
- 期刊代码：54_00222313
- 类别：ch
- 出版时间：September, 2012
- 卷：132
- 期：9
- 页码：2433-2438
- 文件大小：989 K
摘要
The CsGd<sub>2sub>F<sub>7sub> crystal co-doped with 1 at%Er<sup>3+sup> and 0.2 at%Dy<sup>3+sup> ions was studied using the excitation of both synchrotron radiation and 355 nm laser. All the emission bands were assigned by using the Dieke diagram together with the conclusions from relaxation kinetics studies. The onset of the 4f-5d transition bands and the centers of charge transfer bands were also calculated for the lanthanide series CsLn<sub>2sub>F<sub>7sub> and the results were used to assign the bands and peaks in the excitation spectra. The energy transfer and relaxation processes in CsGd<sub>2sub>F<sub>7sub> were thoroughly analyzed. Quantum cutting downconversion of one vacuum ultraviolet to two visible photons was realized under 154 nm excitation. Upconverted green emission was observed under 980 nm excitation.