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Title
Japanese: 
English:Planar-orientation polycrystalline thin film of liquid-crystalline organic semiconductor by template-directed self-assembly 
Author
Japanese: Wang Yi-Fei, 飯野 裕明, 半那 純一.  
English: Yi-Fei Wang, Hiroaki Iino, Jun-ichi Hanna.  
Language English 
Journal/Book name
Japanese: 
English:Applied Physics Express 
Volume, Number, Page Volume 10    Number 10    Page 101601
Published date Sept. 6, 2017 
Publisher
Japanese: 
English:The Japan Society of Applied Physics 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
DOI https://doi.org/10.7567/APEX.10.101601
Abstract We fabricated planar-orientation crystalline thin films of organic semiconductors, in which molecules sit parallel, i.e., “face-on”, on the substrate and favor vertical charge transport. Thanks to molecular orientation that is sensitive to surface properties and the self-organization of liquid crystals, planar-orientation crystalline thin films can be prepared by simply cooling a smectic liquid-crystalline organic semiconductor from isotropic temperature with the aid of a poly(vinyl alcohol) (PVA) microtemplate. The molecular orientation of crystalline thin films was investigated by polarized optical microscopy (POM) and X-ray diffraction (XRD) analysis, and the current–voltage characteristics of the films were studied in a diode configuration. The results showed high potential for device applications

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