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Lim B.-W.,Inha University | Lee Y.-J.,Inha University | Kim J.-H.,Inha University | Jeong H.-T.,Korea Institute of Technology KITECH | And 6 more authors.
Journal of Nanoscience and Nanotechnology | Year: 2015

Thin film transparent oxides have attracted considerable attention over the last few decades for transparent electronic applications, such as flat panel displays, solar cells, touch-pads, and mobile devices. Metallic doped InZnO (IZO) films have been suggested for the transparent layer exhibiting semiconducting or metallic properties because of its controllable mobility and excellent electrical properties, but they show a degradation of the electrical performance under bending conditions. This study assessed Ni doped IZO (NIZO) films as a flexible transparent electrode on different flexible transparent substrates for flexible electronic applications. Thin NIZO films were deposited on cellulose, PES and glass substrates using a sputtering system with a single NIZO target (In2O3 73.8/ZnO 15.7/NiO 10.5 mol.%) at room temperature. During deposition of the NIZO films, the total flow rate of the carrier gas was maintained using a regulating system. The effects of the oxygen content in the carrier gas on the structural, electrical and optical properties of the thin films deposited on flexible substrates was characterized. The results highlight the feasibility of the transparent NIZO oxide layer on flexible substrates as a flexible electrode with a relatively high sheet resistance, which is strongly related to the crystallographic structure and oxygen content during the film deposition process. Copyright © 2015 American Scientific Publishers All rights reserved.

Lim B.-W.,Inha University | Lim B.-W.,Korea Institute of Technology KITECH | Kim Y.-B.,Korea Institute of Technology KITECH | Song S.-I.,Korea Institute of Technology KITECH | And 2 more authors.
Materials Research Bulletin | Year: 2014

The demand for flexible transparent conducting oxides (TCOs) for optoelectronic applications, such as touch panels, flat panel displays, organic light-emitting diodes (OLEDs) and other mobile devices, has been increasing continuously. To produce flexible TCOs electrodes, amorphous ZnO-doped ITO (ZITO) films were deposited on flexible transparent cellulose, PES and glass substrates by RF sputtering using a single target (In2O3 50.7/ZnO 44.4/SnO2 4.9 mol%). With increasing oxygen ratio during ZITO film deposition, the sheet resistance increased linearly, whereas the carrier density decreased, which may be due to the rough surface of cellulose caused by the regeneration film process. The overall electrical performance of ZITO was found to be comparable to that of the other transparent substrates. © 2014 Elsevier Ltd.

Inhoon J.,Korea Institute of Technology KITECH | Yang G.-H.,Korea Institute of Technology KITECH | Kim K.,Korea Institute of Technology KITECH | Lee S.,Korea Institute of Technology KITECH | And 2 more authors.
26th International Conference on Computer Applications in Industry and Engineering, CAINE 2013 | Year: 2013

This paper deals with the development of the water quality monitoring system combining robot technology and sensor network technology. In order to obtain information for water quality monitoring, a flock of robotic fishes has been developed and put into the aquatic environment. The monitoring system has the sensor network topology that consists of control tower, docking station and robotic fishes.

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