Abstract
In this study, ZnO nanorods (NRs) have been successfully grown onto polytetrafluoroethylene (PTFE) substrates at low temperatures (85, 90, 95, 100 °C) by chemical bath deposition. Growth temperature for the prepared ZnO NRs was controlled by using electrical oven equipped with digital heat control. It is found that at 95 °C, well vertically aligned ZnO NRs are obtained with enhanced structural and optical properties. The crystallite size, lattice strain, and near-band edge emission of ZnO NRs band gap energy have been significantly improved as confirmed by X-ray diffraction and photoluminescence measurements. The crystallite size increases significantly from 52 to 94 nm as the growth temperature is raised by 10 °C only, i.e., from 85 to 95 °C. Besides, the near band edge emission to deep level emission ratio has been also enhanced, from 1.328 to 4.474 for 85 to 95 °C, respectively. The obtained results highlight that the properties of ZnO NRs can be tuned and controlled through the growth temperature. Besides, this study introduced a facile cost-effective method to produce ZnO NRs for flexible based-electronic applications.
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