Alternating copolymers such as P (3, 6-EHCZ-alt-Al), P (Bis-EHCZ-alt-Al) and P (2, 7-EHCZ- alt-Al), based on blue-emitting carbazole and hole-transporting triarylamine units in the polymer backbone, were successfully synthesized by using palladium-catalyzed polycondensation reaction. P (Bis-EHCZ-alt-Al) exhibited blue shift both in UV-Vis absorption and PL emission, while P (2, 7-EHCZ-alt-Al) showed red shift in UV-Vis ...