| Autor: |
Horst P. Strunk, Gerhard Frank, Hugh H. Richardson, S.B. Aldabergenova, Muhammad Maqbool, M. E. Kordesch |
| Rok vydání: |
2006 |
| Předmět: |
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| Zdroj: |
Journal of Non-Crystalline Solids. 352:1290-1293 |
| ISSN: |
0022-3093 |
| DOI: |
10.1016/j.jnoncrysol.2005.11.120 |
| Popis: |
We have investigated the optical activity of Ho 3+ ions in AlN layers in the as prepared and annealed states. The films were grown using RF magnetron sputtering in a pure nitrogen atmosphere. After annealing we observe strong characteristic Ho 3+ emission peaks at 549, 660 and 760 nm corresponding to the 5 S 2 → 5 I 8 , 5 F 5 → 5 I 8 and 5 I 4 → 5 I 8 transitions, respectively. The emission peak at around 692 nm corresponds to the Cr 3+ emission (Cr is an unintentional dopant). A strong increase in Ho 3+ emission intensity and activation of Cr 3+ ions are accompanied by enhanced oxygen and other defect related luminescence. The structural analysis shows that during annealing new AlN crystallites form in the initially mostly amorphous AlN matrix. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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