Three novel vinyl polymers, containing pendant carbazole and triphenylamine chromophores attached with diphenyl group, were synthesized by radical polymerization to investigate the optoelectronic properties . The new polymers showed wide band gaps (3.17-3.20 eV) and had good thermal stabilities. Three new polymers were studied as electrophosphorescent host materials in PLED devices. Electrophosphorescent devices with the configuration of ITO/PEDOT:PSS/polymers:Ir(ppy)3:PBD/Mg/Ag were fabricated. The polymer SCzCz based device showed a maximum current efficiency of 17.5 cd/A and maximum brightness of 15800 cd/m2. When we blended with different ratios of electron transport materials (TRZ and PBD) in the same system, the brightness was enhanced to 23400 cd/m2, and the maximum efficiency of 12.3 cd/A .

Synthesis and characterization of a novel alkyl main chain pendant biphenyl carbazole and triphenylamine unit as host for polymer light emitting diodes

243rd National Meeting (2012)

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