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Proceedings Paper

Optical properties of ZnO nanowires grown by thermal evaporation
Author(s): Zhi Zhao; Yue Lin; Jian Zuo; Zejun Ding
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Paper Abstract

The mass production of wurtzite-type structure ZnO nanowires were synthesized by a simple and rapid method based on the thermal evaporation of metal zinc pellets without the use of noble metal catalyst. The PL spectrum at room temperature shows a strong near band gap emission (NBE) peak and a weak deep-level emission (DL) peak, which implies its good crystallinity and high optical quality. The DL and NBE emission are considered to originate from the singly ionized oxygen vacancy and the overlap of free exciton and free-to-band emission respectively by electron paramagnetic resonance (EPR) spectroscopy and low temperature photoluminescence. The coupling parameters of exciton-acoustic phonon and of exciton-longitudinal-optical phonon were determined as 63.44 μeV/K and 898 meV, and 251 K for Einstein temperature according to the temperature dependence of free exciton emission spectra.

Paper Details

Date Published: 21 October 2009
PDF: 8 pages
Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 74935Z (21 October 2009); doi: 10.1117/12.840031
Show Author Affiliations
Zhi Zhao, Univ. of Science and Technology of China (China)
Yue Lin, Univ. of Science and Technology of China (China)
Jian Zuo, Univ. of Science and Technology of China (China)
Zejun Ding, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 7493:
Second International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Anand K. Asundi; Wolfgang Ecke, Editor(s)

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