An Efficient Blue‐Emitting Conjugated Copolymer Based on Fluorene and Carbazole with a Peripheral Dendritic Carbazole Pendant at the 9‐Position

Abstract

AbstractA new fluorene‐co‐carbazole‐based copolymer (PFCD), with a bulky peripheral dendritic carbazole pendant at the 9‐position, has been designed and synthesized through a Suzuki polycondensation reaction. The resulting copolymer exhibits desirable properties, such as excellent solubility, good thermal stability, and electrochemical properties. PFCD also shows efficient blue light‐emitting properties with excellent color purity and high photoluminescent quantum yield. The results of the photophysical properties indicate that the large side dendron with peripheral carbazole groups can not only efficiently suppress the π‐stacking of polymer chains but also raise the HOMO level of the resulting polymer material. Thus, PFCD is expected to be a promising pure blue light‐emitting material and further experiments on electroluminescent properties, film morphology, and aggregation behaviors are in progress.magnified image