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Electrical Characterization of Printed ITO Films Fabricated on Biodegradable Plastic Substrate
New Phys.: Sae Mulli 2020; 70: 12~18
Published online January 31, 2020;
© 2020 New Physics: Sae Mulli.

Dongwan KO1, Junseck CHOI1, Joonyoung SEO1, Jaeha NOH1, Jiho CHANG1*, Sangtae LEE2, Jung-Yeul Jung3,Moonjin LEE3

1Major of Electronic Materials Engineering, Korea Maritime and Ocean University, Busan 49112, Korea
2Department of Offshore Plant Management, Korea Maritime and Ocean University, Busan 49112, Korea
3Maritime Safety and Environmental Research Division, Korea Research Institute of Ships and Ocean engineering, Daejeon 34103, Korea
Correspondence to:
Received October 5, 2019; Revised November 14, 2019; Accepted November 18, 2019.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
For fabricating hazardous and noxious substance (HNS) sensors based on biodegradable plastics, we printed indium-tin-oxide (ITO) films and analyzed their electrical and structural properties. Differential scanning calorimetry (DSC) was used to determine the heat treatment temperature by investigating the glass transition temperature of the poly lactic acid (PLA) substrate. Also, the films were fabricated by introducing a film-surface treatment process. The structural and the electrical properties of the fabricated film were compared with those for sputtered ITO films by using X-ray diffraction (XRD) and Hall effect measurements. The grain size of the printed ITO (P-ITO) was calculated to be 37.4 nm, the carrier concentration was 4.35 $\times$ 10$ ^{18}$ cm$ ^{-3}$ and the mobility was 1.43 cm$ ^{2}$/Vs at 300 K. The conductivity of the ITO film was limited by grain boundary scattering, and the resistivity of the ITO film varied due to thermal excitation of carriers trapped at the grain boundary.
PACS numbers: 77.84.Bw, 52.70.Ds
Keywords: HNS sensor, PLA, Printed ITO film, Conduction characteristics

January 2020, 70 (1)
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