Journal
SOFT MATTER
Volume 13, Issue 37, Pages 6499-6505Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7sm01303e
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Funding
- JSPS KAKENHI [18850008, B21750188, B24750178, 15K05662]
- Grants-in-Aid for Scientific Research [15K05662, 18850008] Funding Source: KAKEN
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Fabrication of planarly-oriented polycrystalline thin films of organic semiconductors was investigated, in which molecules sit parallel, i.e., face-on'' on the substrate so as to allow vertical charge transport favorably through a thin film. With the aid of self-organization of liquid crystalline molecules and an over-coated orientation layer, tens of nm thin films vertically oriented can be re-oriented from hemeotropic, or vertical'' to homogenous or planar'' to achieve polycrystalline thin films planarly oriented after removing the over-coated orientation layer. We investigated the key factors to affect re-orientation of the films and uniformity and surface morphology of the resulting films, including conditions required for the re-orientation and properties of the orientation layer materials and liquid crystals.
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