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Paper
J. Mater. Chem., 2008, 18, 1029 - 1036, DOI: 10.1039/b715746k
Functionalized anthradithiophenes for organic field-effect transistors
Ming-Chou Chen, Choongik Kim, Sheng-Yu Chen, Yen-Ju Chiang, Ming-Che Chung, Antonio Facchetti and Tobin J. Marks
Two new semiconductors for organic thin-film transistors (OTFTs), diperfluorophenyl anthradithiophene (DFPADT) and dimethyl anthradithiophene (DMADT), have been synthesized and characterized. The first material exhibits ambipolar transport in OTFT devices with field-effect mobilities (
) of 6 × 10-4 cm2 V-1 s-1 and 0.05 cm2 V-1 s-1 for electrons and holes, respectively. Therefore, diperfluorophenyl substitution was found to be effective to induce n-type transport. Dimethyl-substituted anthradithiophene (DMADT) was also synthesized for comparison and exhibited exclusively hole transport with carrier mobility of 
0.1 cm2 V-1 s-1. Within this semiconductor family, OTFT carrier mobility values are strongly dependent on the semiconductor film growth conditions, substrate deposition temperatures, and gate dielectric surface treatment.
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