Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1787565 | Current Applied Physics | 2007 | 4 Pages |
Abstract
We report a visible luminescence of Er3+ ions in an amorphous-nanocrystalline AlN:Er thin film prepared by co-deposition using AlN, Er, and SiO2 targets. A PL emission spectrum of Er3+ in the AlN:Er film annealed at 750 °C showed a strong bluish green emission of Er3+ in the amorphous-nanocrystalline AlN:Er thin film, which is attributed to the intra-4fEr3+ transitions of 2H11/2 â 4I15/2 and 4F7/2 â 4I15/2. It was found that crystallite diameters were between 3 and 5 nm by high-resolution transmission electron microscopy. The occurrence of the strong Er3+ emission in the annealed AlN:Er thin film with a mixture of amorphous and nanocrystalline phases may be contributed to an increase in the number of excitation Er3+ centers and a presence of oxygen related to Er3+ excitation and recombination process in the AlN:Er thin film.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
J.-W. Lim, W. Takayama, Y.F. Zhu, J.W. Bae, J.F. Wang, S.Y. Ji, K. Mimura, J.H. Yoo, M. Isshiki,