Device characteristics of nanostructured poly(p-phenylenevinylene)

An aqueous solution of a poly(p-phenylenevinylene) (PPV) precursor is combi ned with a self-assembling monomer to form an inverted hexagonal lyotropic liquid-crystalline mesophase. With this strategy we obtain hexagonally-pack ed tubular channels ordered on a nanometer scale filled with PPV chains. Is olated and well orientated molecules can be achieved. This nanocomposite is used as an emissive layer in light emitting diodes (LEDs) built up in a sa ndwich structure. We compare the I/V characteristics, electroluminescence ( EL) spectra and the overall performance of the nanostructured PPV to that o f pure PPV LEDs.