Raman investigation of incident N-, Xe-ions induced effects in ZnO thin films
Abstract
Highly c-axis orientation ZnO thin films with hundreds nanometers in thickness have been deposited on (1 0 0) Si substrate by RF magnetron sputtering. These films are implanted at room temperature by 80 keV N-ions with fluences from 5.0 × 10 14 to 1.0 × 10 17 ions/cm 2, implanted by 400 keV Xe-ions with 2.0 × 10 14 to 2.0 × 10 16 ions/cm 2, irradiated by 3.64 MeV Xe-ions with 1.0 × 10 12 to 1.0 × 10 15 ions/cm 2, or irradiated by 308 MeV Xe-ions with 1.0 × 10 12 to 5.0 × 10 14 ions/cm 2, respectively. Then the ZnO films are investigated using a Raman spectroscopy. The obtained Raman spectra show that a new Raman peak located at about 578 cm -1 relating to simple defects or disorder phase appears in all ZnO films after ion implantation/irradiation, a new Raman peak at about 275 cm -1 owing to N-activated zinc-like vibrations is observed in the N-implanted samples. Moreover, a new Raman peak at about 475 cm -1 is only seen in the samples after 400 keV and 3.64 MeV Xe-ions bombardment. The area intensity of these peaks increases with increasing ion fluence. The effects of ion fluence, element chemical activity, atom displacements induced by nuclear collisions as well as energy deposition on the damage process of ZnO films under ion implantation/irradiation are discussed briefly.
- Publication:
-
Nuclear Instruments and Methods in Physics Research B
- Pub Date:
- May 2011
- DOI:
- 10.1016/j.nimb.2010.12.084
- Bibcode:
- 2011NIMPB.269..837Z