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Conversion of near-ultraviolet radiation into visible and infrared emissions through energy transfer in Yb2O3 doped SrOTiO2SiO2 glasses

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8 Author(s)
Ye, Song ; State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China ; Zhu, Bin ; Liu, Yin ; Teng, Yu
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We demonstrated the conversion of near-ultraviolet radiation of 250–350 nm into visible emission of 450–600 nm and near-infrared emission of 970–1100 nm in the Yb2O3 doped transparent 40SrO-20TiO2-40SiO2 glasses. The observed broad visible emission band centered at 510 nm is associated with silicon-oxygen-related defects in the glassy matrix, and the near-infrared emission originated from the Yb3+ 2F5/22F7/2 transition is due to the energy transfer from silicon-oxygen-related defects to Yb3+. The energy transfer process was studied by both the steady state spectra and the time-resolved spectra of Yb3+ at 15 K. The temperature dependent energy transfer rate was calculated. The Yb2O3 concentration dependent energy transfer efficiency has also been evaluated, and the maximum value is 56% for 12 mol % Yb2O3 doped glass.

Published in:

Journal of Applied Physics  (Volume:105 ,  Issue: 6 )