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Optically Proved Molecular Alignment Behavior of Organic Semiconductor and Its Application for Organic Transistor with Enhanced Electrical Characteristics

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We systematically studied the dependence of electrical characteristics in organic field-effect transistors (OFETs) on the optically proved degree of molecular alignment. In order to control the molecular alignment behavior, we applied rubbing techniques onto a polymeric layer. With increasing the number of rubbing processes, the organic semiconducting molecules show more aligned features, and thus, higher electrical properties are obtained. In addition, we adopted a photo-elastic modulator (PEM) approach in order to prove the molecular behavior which is highly effective to analyze the molecular structure with simple experimental setup. It is concluded that the enhanced electrical properties of the OFETs originate from the multi-rubbing-induced molecular alignment of organic semiconductor.
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Keywords: Molecular Ordering; OFETs; Optical Anisotropy; PEM; Pentacene; Rubbing

Document Type: Research Article

Affiliations: 1: Department of Electronics and Control Engineering, Hanbat National University, Daejeon, 34158, Korea 2: Department of Chemical Engineering, Hanbat National University, Daejeon, 34158, Korea 3: School of Electronics Engineering, Kyungpook National University, Daegu 41566, Korea 4: Department of Creative Convergence Engineering, Hanbat National University, Daejeon, 34158, Korea

Publication date: June 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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