Monitoring of Crystallization Process in Solution-Processed Pentacene Thin Films by Chemical Conversion Reactions
抄録
Solution-processable organic semiconductors having bulky substituent groups on the π-conjugated skeleton are rapidly gaining attention for their potential applications to large-area electronics. While the substituent groups contribute to the good solubility in organic solvents, they give rise to hopping sites in a thin film, affecting adversely the charge-carrier transport. As an alternative material, a solvent-soluble precursor compound with thermally cleavable functional groups is promising, which can be converted by heat treatment into a thin film to generate the desired material consisting solely of conjugated systems. This precursor approach is practically applied to various thin-film-based devices. The overall process of the thin film growth, however, remains unrevealed. In the present study, solution-processed pentacene thin films are prepared from a thermally convertible precursor, and the structural evolution during the chemical conversion reaction has been revealed by a combination of cutting-edge analytical tools of two-dimensional X-ray diffraction (2D-GIXD) and p-polarized multiple-angle incidence resolution spectrometry (pMAIRS). The highlight is that pentacene is crystallized in a stepwise manner in the thermally converted films, which is substantially different from a typical growth process. In addition, influences of the oxidation reaction of pentacene on the molecular arrangement are also discussed quantitatively. This study provides a fundamental schematic of thin films grown by the precursor method.
収録刊行物
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- The Journal of Physical Chemistry C
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The Journal of Physical Chemistry C 125 (4), 2437-2445, 2021-01-10
American Chemical Society (ACS)
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詳細情報 詳細情報について
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- CRID
- 1050287142223459840
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- NII論文ID
- 120006954892
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- ISSN
- 19327447
- 19327455
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- HANDLE
- 2433/261219
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- 本文言語コード
- ja
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- 資料種別
- journal article
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- データソース種別
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