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Process optimization of organic thin-film transistor by ink-jet printing of DH4T on plastic

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5 Author(s)
Song, Dae Ho ; Advanced Display Research Center, Kyung Hee University, Seoul 130-701, Korea ; Min Hee Choi ; Kim, June Young ; Jin Jang
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The authors studied the organic thin-film transistor (OTFT) with a solution based dihexylquaterthiophene (DH4T) by ink-jet printing. The DH4T with 1.0 wt % solution in dichlorobenzene was used for printing of an active layer of OTFTs. In order to obtain a smooth and uniform film of DH4T, the substrate temperature was elevated to 60 °C and the printing was performed by an overlapping method. The OTFT on plastic exhibited an on/off current ratio of ∼107, a threshold voltage of -0.25 V, a gate voltage swing of 0.45 V/decade, and a field-effect mobility of 0.043 cm2/V s in the saturation region.

Published in:

Applied Physics Letters  (Volume:90 ,  Issue: 5 )

Date of Publication:

Jan 2007

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