2,9-DPh-DNTTOrganic heterojunctionBuffer layerPhotolithographyHigh-mobility thin film transistors of para-sexiphenyl (p-6P)/2,9-diphenyl-dinaphtho[2,3-b:2′,3′-f]-thieno thiophene (2,9-DPh-DNTT) are demonstrated by employing copper hexadecauorophthalocyanine (F16CuPc), cobalt (II) hexadeca...