Journal
THIN SOLID FILMS
Volume 520, Issue 7, Pages 2449-2454Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2011.10.006
Keywords
Zinc oxide; Optical property; Structural property; Polymer substrate; X-ray diffraction; Photoluminescence; Flexible devices
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Funding
- MKE (the Ministry of Knowledge Economy), Republic of Korea, under the ITRC (Information Technology Research Center) [NIPA-2011-C1090-1121-0015]
- Fundamental R&D Program for Core Technology of Materials
- Ministry of Knowledge Economy, Republic of Korea
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Zinc oxide (ZnO) nanorods were grown on polyethersulfone substrates with a seed layer by hydrothermal synthesis. The effects of the growth temperature and duration on the structural and optical properties of the ZnO nanorods were investigated by X-ray diffraction, field emission scanning electron microscope and photoluminescence measurements. Improvement of the structural properties was confirmed when the ZnO nanorods were grown at a moderate thermal energy. Thermal energies that were too high or too low resulted in structural degradation: low thermal energies did not provide enough energy for the ZnO growth, and high thermal energies contributed to improper growth by creating an uncommon flake-like structure. Photoluminescence measurements showed that the near-band-edge emission to deep-level emission peak ratio increases with increasing growth temperature at growth duration of 5 h. (C) 2011 Elsevier B.V. All rights reserved.
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