| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1487204 | Materials Research Bulletin | 2016 | 5 Pages |
•Enhanced red UC emission of Mn–Tm–Yb co-doped glass-ceramics were prepared by Mn2+.•Ratio I698/I478 increases about ten-fold with increase of Mn2+ up to 4.0 mol.%.•Energy transfer between the Tm3+ ions and the Mn2+–Yb3+ dimer have been discussed.•Constitution of the ET Bridge between the Tm3+ and the Mn2+–Yb3+ dimer was proposed.
The effects of Mn2+ ions on the enhancement red upconversion emission intensity of Mn2+/Tm3+/Yb3+ tri-doped transparent glass-ceramics were investigated. The ratio I698nm/I478nm significantly increases about ten-fold with the increase of Mn2+ concentrations up to 4.0 mol.%. The red upconversion emission of Mn2+/Tm3+/Yb3+ tri-doped transparent glass-ceramics is greatly enhanced, due to constitution of the energy transfer bridge. The upconversion mechanism, the energy transfer and back energy transfer processes between the (1G4 → 3H6), (3F2 → 3H6) transitions of Tm3+ ions and the ∣2F7/2, 4T1〉 → ∣2F7/2, 6A1〉 transitions of Mn2+–Yb3+ dimer were discussed.
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