2012 Fiscal Year Final Research Report
Electric-field-induced orientation control of organic semiconductor in a liquid for FET fabrication
| Project/Area Number |
23760001
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | The Institute of Physical and Chemical Research |
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Principal Investigator |
MATSUKAWA Takeshi 独立行政法人理化学研究所, テラヘルツ光源研究チーム, 特別研究員 (60580876)
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| Research Collaborator |
ONODERA Tsunenobu 東北大学, 多元物質科学研究所, 助教 (10533466)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 電子電気材料 / 有機半導体結晶 / 外場応答 / 結晶配向制御 / 半導体物性 / 結晶成長 |
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| Research Abstract |
The electric field-induced orientation of rubrene single crystals was observed in a nonpolar solvent. Rubrene single microcrystals responded to an AC electric field beyond a crystal-size dependent threshold. The maximum dipole moment induced in the longitudinal axis (b-axis) of rubrene single crystals on a SiO_2/Si substrate was aligned almost parallel to the direction of the applied electric field. Field-effect transistors with these orientated crystals exhibited low variability of the carrier mobility of 0.03～0.07 cm^2/Vs. The orientation technique is expected to be applied to the fabrication of large-area single-crystal FETs.
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