Abstract
Sol-gel spin-coating was used to deposit Co-doped ZnO thin films onto quartz glass substrates. A secondary phase could not be detected in the films from their X-ray diffraction patterns, implying that substituting Co2+ ions into the ZnO matrix did not modify its wurtzite structure. We used an ultraviolet (UV)-visible spectrometer to measure the optical properties of the Co-doped ZnO thin films at room temperature to demonstrate that Co2+ ions had been substituted for Zn2+ ions in the wurtzite structure. The UV transmittance spectra for the films showed absorption peaks at 568.1, 609.3, and 660.1 nm. Moreover, the area under the absorption wells between 500 and 700 nm increased with increasing Co concentrations in the films. These results indicate that Co2+ ions had been substituted for Zn2+ ions in the crystal lattice of the films.
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References
W.-C. Shih, H.-Y. Su and M.-S. Wu, Thin Solid Films 517, 3378 (2009).
S. S. Lin, J. G. Lu, Z. Z. Ye, H. P. He, X. Q. Gu, L. X. Chen, J. Y. Huang and B. H. Zhao, Solid State Commun. 148, 25 (2008).
K. J. Chen, F. Y. Hung, S. J. Chang and S. J. Young, J. Alloys Comp. 479, 674 (2009).
T. Dietl, H. Ohno, F. Matsukura, J. Cibert and D. Ferrand, Science 287, 1019 (2000).
J. M. Kikkawa and D. D. Awschalom, Nature 397, 139 (1999).
I. Zutic, J. Fabian and S. Das Sarma, Phys. Rev. B 64, 121201 (2001).
S. Hayamizu, H. Tabata, H. Tanaka and T. J. Kawai, J. Appl. Phys. 80, 787 (1996).
J. A. Anna Selvan, H. Keppner and A. Shah, Mater. Res. Soc. Symp. Proc. 426, 497 (1996).
J. L. Deschanvres, B. Bochu and J. C. Joubert, J. Phys. 4, 485 (1993).
G. Nam, M. S. Kim, D. Y. Kim, K. G. Yim, S. Kim, S.-O. Kim, D.-Y. Lee and J.-Y. Leem, Mater. Res. Bull. 47, 2879 (2012).
S. Kim, M. S. Kim, G. Nam and J.-Y. Leem, Electron. Mater. Lett. 8, 445 (2012).
D. Y. Kim, S.-O. Kim, M. S. Kim, K. G. Yim, S. Kim, G. Nam, D.-Y. Lee and J.-Y. Leem, J. Korean Phys. Soc. 60, 94 (2012).
Y. J. Zeng, Z. Z. Ye, J. G. Lu, W. Z. Xu, L. P. Zhu, B. H. Zhao and S. Limpijumnong, Appl. Phys. Lett. 89, 042106 (2006).
T. Ivetic, Z. Vukovic, M. V. Nikolic, V. B. Pavlovic, J. R. Nikolic, D. Minic and M. M. Ristic, Ceram. Int. 34, 639 (2008).
D. Iusan, B. Sanyal and O. Eriksson, J. Appl. Phys. 101, 09H101 (2007).
J. Cui, Q. Zeng and Ursula J. Gibson, J. Appl. Phys. 99, 08M113 (2006).
R. Romero, D. Leinen, E. A. Dalchiele, J. R. Ramos- Barrado and F. Martin, Thin Solid Films 515, 1942 (2006).
G. Nam, S. Kim, M. S. Kim, K. G. Yim, D. Y. Kim, S.-O. Kim and J.-Y. Leem, J. Korean Phys. Soc. 59, 129 (2011).
C. Song, F. Zeng, K. W. Geng, X. J. Liu and F. Pan, Phys. Rev. B 76, 045215 (2007).
L. Yan, C. K. Ong and X. S. Rao, J. Appl. Phys. 96, 508 (2004)
M. S. Kim, K. G. Yim, S. Kim, G. Nam, D.-Y. Lee, J. S. Kim, J. S. Kim and J.-Y. Leem, Acta Phys. Pol. A 121, 217 (2012).
G. E. Jellison and Jr. L. A. Boatner, Phys. Rev. B 58, 3586 (1998).
K. Ando, H. Saito, Z. Jin, T. Fukumura, M. Kawasaki, Y. Matsumoto and H. Koinuma, J. Appl. Phys. 89, 7284 (2001).
Y. Kayanuma, Solid State Commun. 59, 405 (1986).
P. E. Lippens and M. Lannoo, Phys. Rev. B 39, 10935 (1989).
S. Adachi, Handbook on Physical Properties of Semiconductors (Kluwer Academic, Dordrecht, 2004), Vol. 3.
F. Urbach, Phys. Rev. 92, 1324 (1953).
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Nam, G., Yoon, H., Leem, JY. et al. Structural properties and optical constants of Co-doped ZnO thin films deposited using sol-gel spin-coating. Journal of the Korean Physical Society 63, 1962–1967 (2013). https://doi.org/10.3938/jkps.63.1962
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DOI: https://doi.org/10.3938/jkps.63.1962