Abstract
Raman spectra of (Mn, Co)-codoped ZnO films were investigated as functions of laser line and temperature. It is shown that the Raman shifts for different phonon modes exhibit redshift with temperature increasing, which can be attributed to the anharmonic effect in the material. Strong resonant Raman spectra of multi-LO phonons were observed as well for the films with the exciting photon energy higher than the direct band gap. Compared with the Raman spectra for ZnO films, the Mn, Co codoping effect on the spectra is revealed by the presence of additional phonon modes at 275 and 642cm−1 and another intensive phonon mode at around 524cm−1. With postannealing, Raman intensity of these phonon modes decrease, owing to the incorporation of oxygen into the films. Origins of the different phonon modes in the spectra are discussed as well.
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Dates
Type | When |
---|---|
Created | 19 years ago (Aug. 9, 2006, 1:02 p.m.) |
Deposited | 2 years ago (Aug. 4, 2023, 5:03 p.m.) |
Indexed | 3 days, 16 hours ago (Aug. 19, 2025, 6:54 a.m.) |
Issued | 19 years, 2 months ago (June 15, 2006) |
Published | 19 years, 2 months ago (June 15, 2006) |
Published Online | 19 years, 1 month ago (June 26, 2006) |
Published Print | 19 years, 2 months ago (June 15, 2006) |
@article{Du_2006, title={Raman spectroscopy of (Mn, Co)-codoped ZnO films}, volume={99}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.2208298}, DOI={10.1063/1.2208298}, number={12}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Du, C. L. and Gu, Z. B. and Lu, M. H. and Wang, J. and Zhang, S. T. and Zhao, J. and Cheng, G. X. and Heng, H. and Chen, Y. F.}, year={2006}, month=jun }