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Title: A new schematic for poly(3-alkylthiophene) in an amorphous film studied using a novel structural index in infrared spectroscopy
Authors: Shioya, Nobutaka
Shimoaka, Takafumi
Eda, Kazuo
Hasegawa, Takeshi  kyouindb  KAKEN_id
Author's alias: 塩谷, 暢貴
下赤, 卓史
枝, 和男
長谷川, 健
Issue Date: 2015
Publisher: Royal Society of Chemistry (RSC)
Journal title: Physical Chemistry Chemical Physics
Volume: 17
Issue: 20
Start page: 13472
End page: 13479
Abstract: The molecular structure of poly(3-alkylthiophene-2, 5-diyl) in an amorphous film reveals that the short axis of the thiophene ring is kept highly oriented parallel to the substrate, whereas the long axis along the polymer chain is largely disordered. This is unveiled by infrared p-polarized multiple-angle incidence resolution spectroscopy (pMAIRS), achieved by analyzing the orientation angles of three mutually orthogonal vibrational modes localized on the thiophene ring with the aid of a newly developed structural index. This new analytical technique is useful irrespective of the crystallinity of the thin film. As a result, the intrinsic chemical parameters controlling the molecular orientation are understood in a unified manner, and the reason that the hexyl group gives the best results for a photovoltaic cell is also revealed.
Rights: This is the accepted version of the following article, which has been published in final form at
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
DOI(Published Version): 10.1039/C5CP01024A
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