| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1617628 | Journal of Alloys and Compounds | 2011 | 4 Pages |
Tm3+/Er3+/Yb3+ triply doped Y2O3 transparent ceramics were fabricated by solid state reaction and characterized from the point of view of white light upconversion luminescence. All the samples exhibited high transparency not only in near-infrared band but also in visible region. Strong red (Er3+: 4F9/2 → 4I15/2), green (Er3+: 2H11/2, 4S3/2 → 4I15/2) and blue (Tm3+: 1G4 → 3H6) upconversion emissions have been observed under 980 nm excitation at room temperature. By varying the concentration of Er3+ ion, various colors of upconversion luminescence (pure blue, bluish green, pure green and yellowish green), including white light with CIE-X = 0.295 and CIE-Y = 0.312, can be easily achieved.
Research highlights▶ Transparent ceramic materials have become hot spot since the first laser demonstration on Nd:YAG ceramic in 1995, due to the numerous advantages over single-crystal and glasses, realizing white light emission in transparent ceramic has a great potential in application. That is why we started this research. ▶ Tm3+/Er3+/Yb3+ triply doped Y2O3 transparent ceramics were fabricated by solid-state reaction. All the samples exhibited high transparency not only in near-infrared band but also in visible region. ▶ For the Tm/Er/Yb triply doped Y2O3 transparent ceramic, the apparent luminescence can be tuned to pure blue, bluish green, white, pure green or yellowish green with the variation of Er3+ content. ▶ The CIE coordinate of S2 is (X = 0.295, Y = 0.312), which is fairly close to the standard equal energy white light illuminate.
