Luminescence properties of Y2O3:Bi3+, Ln3+ (Ln=Sm,Eu, Dy,Er, Ho) and the sensitization of Ln3+ by Bi3+ |
| |
Authors: | Guifang Ju Yihua Hu Li Chen Xiaojuan Wang Zhongfei Mu Haoyi Wu Fengwen Kang |
| |
Affiliation: | School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Waihuan Xi Road, No. 100, Guangzhou 510006, People''s Republic of China |
| |
Abstract: | The spectroscopic characterization of yttria, singly and doubly doped with Ln3+ (Ln=Sm, Eu, Dy, Er, Ho) and Bi3+ ions, is performed through excitation spectra, emission spectra and decay time measurements. The obtained spectroscopic data clearly indicate that energy transfer takes place from Bi3+ to Ln3+ ions. The energy transfer efficiency of Bi3+→Ln3+ and quantum efficiency of Ln3+ were calculated. Upon excitation of 370 nm (Bi3+ excitation band), the quantum efficiency of Ln3+ varies from ~4% to ~44%. The energy transfer efficiency increases continuously with increasing Ln3+ concentrations, whereas the variation of the quantum efficiency of Ln3+ is complicated. The quantum efficiency of Ln3+ is discussed in terms of electron transfer and cross relaxation. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|