期刊
JOURNAL OF APPLIED PHYSICS
卷 105, 期 2, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3072669
关键词
field effect transistors; liquid crystal polymers; monolayers; organic semiconductors; self-assembly; surface energy; thin film transistors
The field-effect mobility of a liquid-crystalline semiconducting polymer, poly(2,5-bis(3-hexadecylthiophene-2-yl)thieno[3,2-b]thiophene) (PB16TTT), has depended significantly on the surface energies of self-assembled monolayers (SAMs) formed on insulating layers. Using a SAM with fluoroalkyl groups, with a low surface energy of 13.3 mN/m, the mobility of PB16TTT reached as high as 1 cm(2)/V s. These results indicate that an edge-on orientation of the polymer chains progresses more favorably on the surfaces with low surface energies via the liquid-crystalline phase.
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