论文信息 - Photoluminescence of cerium–europium co‐doped SiO2 phosphor prepared by a sol–gel process

Photoluminescence of cerium–europium co‐doped SiO2 phosphor prepared by a sol–gel process

Ce3+ and Eu3+ ions were simultaneously incorporated into a SiO2 matrix by a sol–gel process, resulting in a phosphor that could be used in applications such as fluorescent lamps, solid state lasers, optical waveguides and field emission displays. Variation between blue and red emissions was obtained when co‐doped SiO2:Ce,Eu powders with concentrations ranging from 0 to 5 mol% were exposed to ultraviolet light. An enhanced photoluminescence (PL) intensity from Ce3+, probably due to energy transfer from Eu3+, was observed for activator concentrations ranging from 0 to 1 mol%. Comparatively low PL intensities, especially from Ce3+, associated with concentration‐quenching were observed for activator concentrations in the range of 2–5 mol%. Copyright © 2006 John Wiley & Sons, Ltd.

J. R. Botha | P. Holloway | O. Ntwaeaborwa | H. Swart | R. E. Kroon

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