Luminescence properties of Y2O3:Bi3 , Ln(3 ) (Ln=Sm, Eu, Dy, Er, Ho) and the sensitization of Ln(3 ) by Bi3

作者：Ju, Guifang; Hu, Yihua^*; Chen, Li; Wang, Xiaojuan; Mu, Zhongfei; Wu, Haoyi; Kang, Fengwen

来源：Journal of Luminescence, 2012, 132(8): 1853-1859.

DOI：10.1016/j.jlumin.2012.03.020

• Optical materials
• Chemical synthesis
• Luminescence

The spectroscopic characterization of yttria, singly and doubly doped with Ln(3+) (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 Ln(3+) ions. The energy transfer efficiency of Bi3+ --> Ln(3+) and quantum efficiency of Ln(3+) were calculated. Upon excitation of 370 nm (Bi3+ excitation band), the quantum efficiency of Ln(3+) varies from 4% to 44%. The energy transfer efficiency increases continuously with increasing Ln(3+) concentrations, whereas the variation of the quantum efficiency of Ln(3+) is complicated. The quantum efficiency of Ln(3+) is discussed in terms of electron transfer and cross relaxation.

• 出版日期2012-8
• 单位广东工业大学