| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5397884 | Journal of Luminescence | 2017 | 6 Pages |
Abstract
Energy transfer from Ce3+ to Tb3+ ions in a single crystal of CaF2 has been analyzed for down-conversion application in Si solar cells. The nanophosphor samples were successfully synthesized by the co-precipitation method. Results obtained with x-ray diffraction indicated that the crystallite size were in the range of 30-40Â nm. X-ray photoelectron spectroscopy confirmed the formation of the matrix and the presence of the dopants. The luminescence data obtained clearly indicated that energy transfer between Ce3+ and Tb3+ took place inside the crystalline matrix. The calculated energy transfer efficiency was relatively efficient at the high Tb3+ concentration. The results suggested that Ce3+ may therefore be used as an efficient sensitizer to feed the Tb3+ ions in a CaF2 crystal. UV light may be down shifted to the visible region for solar cell applications.
Keywords
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
M.Y.A. Yagoub, H.C. Swart, E. Coetsee,