Journal
APPLIED SURFACE SCIENCE
Volume 428, Issue -, Pages 233-241Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2017.09.127
Keywords
ZnO nanorod; Single fiber; Wearable computing device; UV detector; RF magnetron sputtering
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Funding
- Basic Science Research Program through National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2017R1D1A1B03030456]
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There has been increasing interest in zinc oxide (ZnO) based ultraviolet (UV) sensing devices over the last several decades owing to their diverse range of applications. ZnO has extraordinary properties, such as a wide band gap and high exciton binding energy, which make it a beneficial material for UV sensing device. Herein, we show a ZnO UV sensing device fabricated on a cylindrical Polyethylene terephthalate (PET) monofilament. The ZnO active layer was synthesized by hydrothermal synthesis and the Cu electrodes were deposited by radio frequency (RF) magnetron sputtering. Cu thin film was deposited uniformly on a single PET fiber by rotating it inside the sputtering chamber. Various characteristics were investigated by changing the concentration of the seed solution and the growth solution. The growth of ZnO nanorods was confirmed by Field Emission Scanning Electron Microscopy (FESEM) to see the surface state and structure, followed by X-ray Diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis. Also, current-voltage (I -V) curves were obtained to measure photocurrent and conductance. Furthermore, falling response time, rising response time, and responsivity were calculated by analyzing current-time (I -t) curves. (C) 2017 Elsevier B.V. All rights reserved.
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