New alternating copolymers comprising 2,7-linked-3,6-dimethyl-9-(2-hexyldecy)-9H-carbazole and 1,4-phenylene units (P1), 2,5-difluoro-1,4-phenylene units (P2), and 2,3,5,6-tetrafluoro-1,4-phenylene units (P3) have been prepared using Suzuki cross-coupling conditions. The polymers were characterized by NMR spectroscopy, UV-vis absorption spectroscopy, fluorescence spectroscopy, and their weight-average molecular weights were estimated using gel permeation chromatography. The polymers are thermally stable up to 420 A degrees C and display wide band gaps ranging from 3.16 to 3.2 eV. The polymers are electrolytically stable and emit around 400 nm. A discussion on the effect of the varying degree of fluorine substitution of the phenylene repeat units in polymers P1-P3 on their physical properties is presented.