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Mg-induced increase of band gap in Zn1−xMgxO nanorods revealed by x-ray absorption and emission spectroscopy
- Source :
- Journal of Applied Physics. 104:013709
- Publication Year :
- 2008
- Publisher :
- AIP Publishing, 2008.
-
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{sub 1-x}Mg{sub x}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 bandgap. The bandgap is found to increase linearly with the Mg content, as revealed by photoluminescence and combined XANES and XES measurements.
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 104
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........848877d15b585abccf426a72585615d6