A diketopyrrolopyrrole-based conjugated polymer, PDPP-4FTVT, which exhibits ambipolar transport behavior in air with hole and electron mobilities up to 3.40 and 5.86 cm(2) V-1 s(-1), respectively, is synthesized via direct arylation polycondensation. Incorporation of F-atoms in beta-positions of thiophene rings dramatically improves the efficiency of direct arylation polycondensation. [GRAPHICS] .