| 光谱学与光谱分析 |
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| The Upconversion Mechanisms for the Red and Green Emissions in Er3+ Doped and Er3+-Yb3+ Codopoed Fluoride Materials Based on Experiment |
| LEI Jun-hui, XIAO Si-guo, YAN Lei, LIU Zheng-wei |
| Physics Department of Xiangtan University, Xiangtan 411105, China |
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Abstract The rare earth Er3+ doped and Er3+-Yb3+ co-doped fluoride samples were prepared. Under 980 nm laser excitation, the intense red (650 nm) and green (545 nm) upconversion luminescence was obtained corresponding to the transitions 4S3/2, 2H11/2—4I15/2 and 4F9/2—4I15/2, respectively. For the Er3+-Yb3+ co-doped fluoride samples, it was found that the ratio of the red upconversion luminescence to the green one decreases as the Er3+ concentration increases. The dependence of upconversion intensities on excitation power indicates that two-photon absorption processes are responsible for the upconverted luminescence. The possible upconversion mechanisms of the red and green emissions are discussed based on the energy-matching conditions and the quadratic dependence on excitation power.
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Received: 2004-05-25
Accepted: 2004-09-20
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Corresponding Authors:
LEI Jun-hui
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| Cite this article: |
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LEI Jun-hui,XIAO Si-guo,YAN Lei, et al. The Upconversion Mechanisms for the Red and Green Emissions in Er3+ Doped and Er3+-Yb3+ Codopoed Fluoride Materials Based on Experiment [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(09): 1382-1384.
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https://www.gpxygpfx.com/EN/Y2005/V25/I09/1382 |
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