Paper Title - Engii€¦ · Web viewSurface-induced orientation of pentacene molecules and...
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Journal of Materials Science and Chemical Engineering, 2016, *, *-* http://www.scirp.org/journal/msce ISSN Online: 2327-6053 ISSN Print: 2327-6045 Surface-induced orientation of pentacene molecules and transport anisotropy by scratched method on SiO2 dielectric layer for organic thin film transistor * Yun Ho Kim (Affiliation): Department of Advanced Materials, Korea Research Institute of Chemical Technology, Daejeon, Korea Email: [email protected] How to cite this paper: Author 1, Author 2 and Author 3 (2016) Paper Title. ******, *, *-*. http://dx.doi.org/10.4236/***. 2016.***** Received: **** **, *** Accepted: **** **, *** Published: **** **, *** Copyright © 2016 by author(s) and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY 4.0). http://creativecommons.org/ licenses/by/4.0/ O pen A ccess Abstract We obtained preferential in-plane molecular orientation and charge-transport anisotropy in pentacene thin-film transistors (TFTs) on conventional SiO2/Si substrates. The nanoscale SiO 2 grooves with depths of 1–3 nm were prepared by a simple scratching process with diamond powder to create a new type of alignment template for inducing the aligned growth of pentacene with in-plane anisotropy. Results of atomic force microscopy and grazing-incidence X-ray diffraction showed that the nanogrooved SiO 2 structure could control the alignment and growth mode of pentacene, and it remarkably decreased the grain size of the pentacene crystals. The charge-carrier mobility along the parallel axis of the nanogrooved structure (0.392 ± 0.039 cm 2 /(V·s)) was more than four-fold higher than that perpendicular to the alignment (0.104 ± 0.048 cm 2 /(V·s)). In addition, we investigated the effect of nanogrooved SiO2’s surface roughness on the electrical properties of the pentacene TFT, which proved to be a crucial factor when compared to the preferential alignment of the DOI: 10.4236/ *** .2016. ***** **** **, 2016
Transcript of Paper Title - Engii€¦ · Web viewSurface-induced orientation of pentacene molecules and...
Journal of Materials Science and Chemical Engineering, 2016, *, *-*http://www.scirp.org/journal/msce
ISSN Online: 2327-6053ISSN Print: 2327-6045
Surface-induced orientation of pentacene molecules and transport anisotropy by scratched method on SiO2 dielectric layer for organic thin film transistor*
Yun Ho Kim
(Affiliation): Department of Advanced Materials, Korea Research Institute of Chemical Technology, Daejeon, KoreaEmail: [email protected]
How to cite this paper: Author 1, Author 2 and Author 3 (2016) Paper Title. ******, *, *-*.http://dx.doi.org/10.4236/***.2016.*****
Received: **** **, ***Accepted: **** **, ***Published: **** **, ***
Copyright © 2016 by author(s) andScientific Research Publishing Inc.This work is licensed under the CreativeCommons Attribution InternationalLicense (CC BY 4.0).http://creativecommons.org/licenses/by/4.0/
Open Access
Abstract
We obtained preferential in-plane molecular orientation and charge-transport anisotropy in pentacene thin-film transistors (TFTs) on con-ventional SiO2/Si substrates. The nanoscale SiO2 grooves with depths of 1–3 nm were prepared by a simple scratching process with dia-mond powder to create a new type of alignment template for induc-ing the aligned growth of pentacene with in-plane anisotropy. Results of atomic force microscopy and grazing-incidence X-ray diffraction showed that the nanogrooved SiO2 structure could control the align-ment and growth mode of pentacene, and it remarkably decreased the grain size of the pentacene crystals. The charge-carrier mobility along the parallel axis of the nanogrooved structure (0.392 ± 0.039 cm2/(V·s)) was more than four-fold higher than that perpendicular to the alignment (0.104 ± 0.048 cm2/(V·s)). In addition, we investigated the effect of nanogrooved SiO2’s surface roughness on the electrical properties of the pentacene TFT, which proved to be a crucial factor when compared to the preferential alignment of the pentacene mole-cule.
Keywords
Nano-groove, Pentacene, Molecular anisotropy, Surface roughness, OTFTs
DOI: 10.4236/ *** .2016. ***** **** **, 2016
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