Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/5668
Title: | Photoluminescence and damage recovery studies in Fe-implanted ZnO single crystals |
Author: | Monteiro, T. Boemare, C. Soares, M.J. Rita, E. Alves, E. |
Issue Date: | Jun-2003 |
Publisher: | American Institute of Physics |
Abstract: | We report Fe3+-related emission in ion-implanted ZnO single crystals. Iron ions were implanted at room temperature with 100 keV and a fluence of 1×1016 Fe+/cm2, and were submitted to annealing treatments in vacuum and in air. After implantation, the damage raises the minimum yield (χmin) from 2% to 50%. Annealing in an oxidizing atmosphere leads to a reduction of the implantation damage, which is fully recovered after annealing at 1050 °C with a χmin∼3% in the implanted region. With extrinsic excitation, red Fe-related emission is observed at low temperatures. The intensity is dependent on the annealing conditions. For samples annealed in air, the luminescence can be detected up to 120 K. When a comparison is made between unimplanted and post-implanted annealed samples, noticeable changes on near-band-edge and deep-level photoluminescence spectra are observed. A thermally populated structured green emission could be observed in the sample annealed in air, as shown by the temperature-dependent photoluminescence excitation studies. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/5668 |
ISSN: | 0021-8979 |
Appears in Collections: | DFis - Artigos |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
JAPL.pdf | versão pdf do editor | 100.15 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.