Article ID Journal Published Year Pages File Type
1627801 Journal of Alloys and Compounds 2006 4 Pages PDF
Abstract

Er3+-doped and Er3+/Yb3+-codoped strontium titanate (SrTiO3) ultrafine powders were prepared in a molten NaCl flux. The intense green and red emissions around 528 nm, 550 nm and 662 nm corresponding to the 2H11/2 → 4I15/2, 4S3/2 → 4I15/2 and 4F9/2 → 4I15/2 transitions, respectively, of Er3+ ions were observed under excitation at 980 nm. A great enhancement of the visible upconversion emissions in Er3+/Yb3+-codoped sample was observed. Excited state absorption and energy transfer process are discussed as the possible mechanisms for these emissions.

Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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