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Study on synthesis and optical properties of Al-doped ZnO hierarchical nanostructures
6. D. F. Liu, Y. J. Xiang, Z. X. Zhang, J. X. Wang, Y. Gao, L. Song, L. F. Liu, X. Y. Dou, X. W. Zhao, S. D. Luo, C. Y. Wang, W. Y. Zhou, G. Wang and S. S. Xie, Nanotechnology16, 2665(2005).
17. C. F. Klingshrin, Semiconductor Optics, Springer, Berlin. 1997.
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Highly densified Al-doped ZnO (denoted as Al-ZnO) hierarchical nanostructures were synthesized on transparent quartz substrate by chemical vapor deposition. It is found that the heating temperature plays a key role on controlling the morphologies of the Al-ZnO hierarchical nanostructures through a temperature dependent migration of Al atoms. Such uneven distribution of Al element in the hierarchical nanostructures is clearly evidenced by the x-ray photoelectron spectrum (XPS) measurements. The obtained Al-ZnO hierarchical nanostructures have transmittance of above 60% in the visible region. The photoluminescence(PL) spectra at low-temperature (20 K) were also measured.
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