Electric field-induced structural changes in pentacene-based organic thin-film transistors studied by in situ micro-Raman spectroscopy

H. L. Cheng; W. Y. Chou; C. W. Kuo; F. C. Tang; Y. W. Wang

doi:10.1063/1.2197937

Electric field-induced structural changes in pentacene-based organic thin-film transistors studied by in situ micro-Raman spectroscopy

H. L. Cheng, W. Y. Chou, C. W. Kuo, F. C. Tang, Y. W. Wang

Research output: Contribution to journal › Article › peer-review

41 Citations (Scopus)

Abstract

We have investigated the electric field-induced microscopic structural changes in polycrystalline pentacene-based organic transistors by using in situ micro-Raman spectroscopy. Extra vibrational modes resulting from molecular coupling effect in pentacene film were studied. The herringbone packing of pentacene molecules in solid film is affected by external field and the process is proven to be partially irreversible. In the meantime, in-phase coupling of the C-H bending mode was found to be highly related to the carrier transport of pentacene film. Obtained results suggest that optimal intermolecular π -orbital overlap of pentacene molecules is still a critical factor impacting the carrier transportation for pentacene film featuring polycrystalline morphology.

Original language	English
Article number	161918
Journal	Applied Physics Letters
Volume	88
Issue number	16
DOIs	https://doi.org/10.1063/1.2197937
Publication status	Published - 2006 Apr 17

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.2197937

Cite this

@article{bdad7ac8c1ca43709711d0cf9df6b6bf,

title = "Electric field-induced structural changes in pentacene-based organic thin-film transistors studied by in situ micro-Raman spectroscopy",

abstract = "We have investigated the electric field-induced microscopic structural changes in polycrystalline pentacene-based organic transistors by using in situ micro-Raman spectroscopy. Extra vibrational modes resulting from molecular coupling effect in pentacene film were studied. The herringbone packing of pentacene molecules in solid film is affected by external field and the process is proven to be partially irreversible. In the meantime, in-phase coupling of the C-H bending mode was found to be highly related to the carrier transport of pentacene film. Obtained results suggest that optimal intermolecular π -orbital overlap of pentacene molecules is still a critical factor impacting the carrier transportation for pentacene film featuring polycrystalline morphology.",

author = "Cheng, {H. L.} and Chou, {W. Y.} and Kuo, {C. W.} and Tang, {F. C.} and Wang, {Y. W.}",

note = "Funding Information: The authors acknowledge financial support from the National Science Council, Taiwan, through Grant NSC 93-2215-E-006-039 and NSC 93-2112-M-006-004. The assistance of the Center for Micro/Nano Technology Research, National Cheng Kung University, for support through equipment and cooperation is gratefully acknowledged. ",

year = "2006",

month = apr,

day = "17",

doi = "10.1063/1.2197937",

language = "English",

volume = "88",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "16",

}

TY - JOUR

T1 - Electric field-induced structural changes in pentacene-based organic thin-film transistors studied by in situ micro-Raman spectroscopy

AU - Cheng, H. L.

AU - Chou, W. Y.

AU - Kuo, C. W.

AU - Tang, F. C.

AU - Wang, Y. W.

N1 - Funding Information: The authors acknowledge financial support from the National Science Council, Taiwan, through Grant NSC 93-2215-E-006-039 and NSC 93-2112-M-006-004. The assistance of the Center for Micro/Nano Technology Research, National Cheng Kung University, for support through equipment and cooperation is gratefully acknowledged.

PY - 2006/4/17

Y1 - 2006/4/17

N2 - We have investigated the electric field-induced microscopic structural changes in polycrystalline pentacene-based organic transistors by using in situ micro-Raman spectroscopy. Extra vibrational modes resulting from molecular coupling effect in pentacene film were studied. The herringbone packing of pentacene molecules in solid film is affected by external field and the process is proven to be partially irreversible. In the meantime, in-phase coupling of the C-H bending mode was found to be highly related to the carrier transport of pentacene film. Obtained results suggest that optimal intermolecular π -orbital overlap of pentacene molecules is still a critical factor impacting the carrier transportation for pentacene film featuring polycrystalline morphology.

AB - We have investigated the electric field-induced microscopic structural changes in polycrystalline pentacene-based organic transistors by using in situ micro-Raman spectroscopy. Extra vibrational modes resulting from molecular coupling effect in pentacene film were studied. The herringbone packing of pentacene molecules in solid film is affected by external field and the process is proven to be partially irreversible. In the meantime, in-phase coupling of the C-H bending mode was found to be highly related to the carrier transport of pentacene film. Obtained results suggest that optimal intermolecular π -orbital overlap of pentacene molecules is still a critical factor impacting the carrier transportation for pentacene film featuring polycrystalline morphology.

UR - http://www.scopus.com/inward/record.url?scp=33646195538&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33646195538&partnerID=8YFLogxK

U2 - 10.1063/1.2197937

DO - 10.1063/1.2197937

M3 - Article

AN - SCOPUS:33646195538

VL - 88

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 16

M1 - 161918

ER -

Electric field-induced structural changes in pentacene-based organic thin-film transistors studied by in situ micro-Raman spectroscopy

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this