Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1669717 | Thin Solid Films | 2010 | 4 Pages |
Abstract
The secondary oxide phases in ZnO:Cr films have been observed to evolve from an initial Cr2O3 phase near the film surface to a final ZnCr2O4 phase throughout the film as the Cr content is increased. Two absorption bands, corresponding to the 4A2→4 T1 and 4A2→4 T2 transitions of Cr3+, can be observed in the Cr2O3-rich sample, whereas the ZnCr2O4-rich sample is opaque at wavelengths ≤ 500 nm. Our results suggest that the formation of secondary oxide phases in ZnO:Cr films is inevitable, leading to a much lower solubility of Cr.
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Authors
Y.M. Hu, C.W. Hsu, C.Y. Wang, S.S. Lee, J.W. Chiou, T.C. Han, G.J. Chen, W.Y. Chou, J. Chang,