Study Of Zinc Oxide Nanostructures Grown On Ptfe Substrate By Chemical Bath Deposition For Photodetector Application
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Date
2018
Authors
Farhat, Omar F A
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
This project devoted to study physical properties of ZnO nanostructure grown on PTFE flexible substrate by chemical bath deposition. A flexible substrate (PTFE, trade name Teflon) was introduced to grow ZnO nanostructure for the first time for obtaining a substrate with a high melting point to improve the crystallization of the material deposited on it by annealing process. This flexible substrate may enable new markets for large-area printed electronics or low-cost disposable devices. Using flexible substrates to fabricate electronic devices promises lower manufacturing costs because of the additive, non-vacuum nature of the technology. The thermal properties of PTFE substrate were characterized by Thermogravimetric analysis (TGA) and Differential scanning calorimetry (DSC) techniques. The PTFE substrate show sharp weight losses at temperature above 530 °C indicated the break of C–C bond beyond this temperature. The melting temperature of PTFE was found to be around 338.29 °C. The study employed PTFE and Si seeded substrates (Si substrate was used for comparison) to grow ZnO nanostructures using the chemical bath deposition (CBD). Radio frequency (RF) sputtering technique was used to deposit ZnO seed layers on to different substrates under a sputtered pressure and power of 4.36 × 10-3 mbar and 150 Watt (W), respectively. The sputtered ZnO seed layer was annealed at different temperatures of 150, 200, 250, and 300 °C. It has found that the annealing temperature has significantly improved the physical (structural and morphological) properties of
the ZnO seed layers.
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Keywords
Zinc oxide nanostructures grown , photodetector application