Synthesis of conjugated polymers containing biphenyl group and their electro-optical properties

Two types of conjugated polymer, poly(MEHPV-co-BPV)s and poly (MEHPV-alt-BP V). were synthesized by dehydrohalogenation and Honer-Emmons condensation, respectively. Single layer type light-emitting diodes were fabricated utili zing synthesized polymers and their electro-optical properties were examine d. Emission spectrum of poly (MEHPV-co-BPV)s had two peaks in the blue and orange region which originated from BPV and MEHPV moiety, respectively. Thi s may be due to the mixture of two homopolymers or the macroblock nature of the BPV and MEHPV unit in the pr,ly(MEHPV-co-BPV)s. However, LED made from poly(MEHPV-alt-BPV) showed a relatively sharp single peak at the yellow-gr een region due to the alternating nature of the repeat units.