Colour emission tunability in Ho3+–Tm3+–Yb3+ co-doped Y2O3 upconverted phosphor
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- 作者：Anurag Pandey (1)
Vineet Kumar Rai (1) - 刊名：Applied Physics B: Lasers and Optics
- 出版年：2012
- 出版时间：December 2012
- 年：2012
- 卷：109
- 期：4
- 页码：611-616
- 全文大小：486KB
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Vineet Kumar Rai (1)
1. Laser and Spectroscopy Laboratory, Department of Applied Physics, Indian School of Mines, Dhanbad, 826004, Jharkhand, India - ISSN：1432-0649
文摘
The frequency upconversion (UC) emission throughout the visible region from the Y2O3:Ho3+–Tm3+–Yb3+ co-doped phosphors synthesized by using low temperature combustion process upon excitation with a diode laser operating at 980?nm have been presented. The colour emission tunability in co-doped phosphor has been observed on increasing the pump power and seen by the naked eyes. The tunability in colour emission has also been visualized by CIE chromaticity diagram. The variation in UC emission intensity of the 1G4?→?sup class="a-plus-plus">3H6 (Tm3+) and 5F3?→?sup class="a-plus-plus">5I8 (Ho3+) transitions lying in the blue region has been monitored with increase in the pump power and marked that their ratio can be used to determine the temperature. The developed phosphor has been used to record fingerprints. The observed most intense visible colour emission from the developed material may be used for photodynamic therapy and as an alternative of traditional fluorescent biolabels.