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Abstract
In this paper, we have reported on improved titanyl phthalocyanine (TiOPc) thin film transistor (TFT) performance utilizing an α,α′-dihexylsexithiophene (DH-α6T) submonolayer. By the detailed XRD and AFM analysis, highly ordering α-TiOPc thin films could be deposited on SiO2/Si substrates modified by a DH-α6T submonolayer. Organic TFT with a TiOPc/ DH-α6T bilayer as active layers realized high mobility of 2.45 × 10−1 cm2 /V s, which is about 100 times greater than that of TiOPc single layer device.