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Shin, Tae Joo
UNIST Synchrotron Radiation Research Laboratory
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Conducting AFM and 2D GIXD studies on pentacene thin films

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Title
Conducting AFM and 2D GIXD studies on pentacene thin films
Author
Yang, HoichangShin, Tae JooLing, Mang-MangCho, KilwonRyu, Chang Y.Bao, Zhenan
Issue Date
2005-08
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.127, no.33, pp.11542 - 11543
Abstract
Among all organic semiconductors, pentacene has been shown to have the highest thin film mobility reported to date. The crystalline structure of the first few pentacene layers deposited on a dielectric substrate is strongly dependent on the dielectric surface properties, directly affecting the charge mobility of pentacene thin film OTFTs. Herein, we report that there is a direct correlation between the crystalline structure of the initial submonolayer of a pentacene film and the mobility of the corresponding 60-nm-thick films showing terrace-like structure, as confirmed by 2D grazing-incidence X-ray diffraction and atomic force microscopy. Specifically, multilayered pentacene films, grown from single crystal-like faceted islands on HMDS-treated surface, have shown much higher charge mobility (μ = 3.4 ± 0.5 cm2/Vs) than those with polycrystalline dendritic islands (μ = 0.5 ± 0.15 cm2/Vs) on OTS-treated ones.
URI
https://scholarworks.unist.ac.kr/handle/201301/16630
URL
http://pubs.acs.org/doi/abs/10.1021/ja052478e
DOI
10.1021/ja052478e
ISSN
0002-7863
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