Open Access Nano Express

Indium tin oxide exhibiting high poly-crystallinity on oxygen plasma-treated polyethylene terephthalate surface

Phil Kook Son13, Suk-Won Choi13* and Sung Soo Kim23

Author Affiliations

1 Department of Advanced Materials Engineering for Information & Electronics, Kyung Hee University, Yongin, Gyeonggi-do, 446-701, Republic of Korea

2 Department of Chemical Engineering, Kyung Hee University, Yongin, Gyeonggi-do, 446-701, Republic of Korea

3 Regional Innovation Center-Components and Materials for Information Display, Kyung Hee University, Yongin, Gyeonggi-do, 446-701, Republic of Korea

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Nanoscale Research Letters 2012, 7:118  doi:10.1186/1556-276X-7-118

Published: 13 February 2012

Abstract

Low-resistivity indium tin oxide [ITO] film was successfully deposited on oxygen plasma-treated polyethylene terephthalate [PET] surfaces at room temperature. X-ray diffraction [XRD] measurements demonstrated that the film deposited on the PET surface that had not been treated with oxygen plasma had an amorphous structure. In contrast, after the low-power oxygen plasma treatment of the PET surface, the ITO film deposited on the PET surface had a poly-crystalline structure due to interactions between electric dipoles on the PET surface and electric dipoles in the ITO film. The minimum resistivity of the poly-crystalline ITO was about 3.6 times lower than that of the amorphous ITO film. In addition, we found that the resistivity of ITO film is proportional to the intensity of the (400) line in the film's XRD spectra.

Keywords:
ITO film; XRD; poly-crystal; PET; low resistivity