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Structural origin of the mobility enhancement in a pentacene thin-film transistor with a photo-crosslinking insulator

Cited 28 time in Web of Science Cited 28 time in Scopus
Authors
Bae, Jin-Hyuk; Kim, Won-Ho; Kim, Hyeok; Lee, Changhee; Lee, Sin-Doo
Issue Date
2007
Publisher
American Institute of Physics
Citation
J. Appl. Phys. 102, 063508
Abstract
We present the underlying mechanism for the mobility enhancement in a pentacene thin-film
transistor TFT with a photocrosslinking polymeric insulator, poly vinyl cinnamate PVCi .
Experimental results for the optical anisotropy, x-ray diffraction, and microscopic layer-by-layer
coverage of the pentacene film on the photocrosslinked PVCi layer, exposed to a linearly polarized
ultraviolet LPUV light, clearly demonstrate the importance of the structural packing of pentacene
grains rather than the directional alignment of the pentacene molecules for the mobility
enhancement. The packing density of pentacene grains is directly related to the number of
photocrosslinking sites of the PVCi insulator produced by the LPUV. It is found that the mobility
in the pentacene TFT is linearly proportional to the number of photocrosslinked sites of the PVCi
insulator serving as interaction sites for the layer-by-layer coverage of the pentacene molecules with
no preferred orientation.
ISSN
0021-8979
Language
English
URI
http://hdl.handle.net/10371/13814
DOI
https://doi.org/10.1063/1.2780869
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Journal Papers (저널논문_전기·정보공학부)
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