1. Mg-induced increase of band gap in Zn1-xMgxO nanorods revealed by x-ray absorption and emission spectroscopy.
- Author
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Chiou, J. W., Tsai, H. M., Pao, C. W., Chien, F. Z., Pong, W. F., Chen, C. W., Tsai, M.-H., Wu, J. J., Ko, C. H., Chiang, H. H., Lin, H.-J., Lee, J. F., and Guo, J.-H.
- Subjects
MAGNESIUM ,ZIRCONIUM ,NANOSTRUCTURES ,EMISSION spectroscopy ,X-ray absorption near edge structure ,IONS ,PHOTOLUMINESCENCE - Abstract
X-ray absorption near-edge structure (XANES) and x-ray emission spectroscopy (XES) measurements were used to investigate the effect of Mg doping in ZnO nanorods. The intensities of the features in the O K-edge XANES spectra of Zn
1-x Mgx O nanorods are lower than those of pure ZnO nanorods, suggesting that Mg doping increases the negative effective charge of O ions. XES and XANES spectra of O 2p states indicate that Mg doping raises (lowers) the conduction-band-minimum (valence-band-maximum) and increases the band gap. The band gap is found to increase linearly with the Mg content, as revealed by photoluminescence and combined XANES and XES measurements. [ABSTRACT FROM AUTHOR]- Published
- 2008
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