SYNTHESIS AND CHARACTERIZATION OF A NEW EFFICIENT BLUE-LIGHT-EMITTINGCOPOLYMER

In this paper we present the synthesis, the characterization, and the use in light-emitting diodes of a new blue-light-emitting copolymer, e rphenyl-4,4''-ylenevinylene-p-phenylenevinylene]. This copolymer, obta ined by a poly-Heck reaction, has a fully unsaturated backbone consist ing of regularly alternating terphenylene and phenylenebisvinylene blo cks. The presence of well-defined chromophores, resulting from steric interactions in the polymer chain, gives rise to bright blue fluoresce nce, both in solution and in thin solid films. Blue-light-emitting dio des were fabricated by using this copolymer as an emitter layer.