COLOR CONTROLLED ELECTROLUMINESCENT DEVICES

摘要

An organic electroluminescent device comprising a composite material, and a method for manufacturing organic electroluminescent devices. The material comprises at least two emissive polymers confined into a layered inorganic host matrix, which effectively isolates the polymer chains from their neighbors. Isolation of the emitting chains inhibits energy transfer and exciton diffusion between polymer chains, such that the electrically generated excitons recombine radiativeley before their energy could be funneled to the emissive moiety with the lowest band gap. The emission color of such a composite is a combination of the emission of the confined polymers, and can be either white light, or can be tuned by selection of the ratio of the mixtures to output light of any desired color. The different polymers can either be mixed and then intercalated into the host matrix, or they can each be intercalated separately into the host matrix and the resulting composites mixed.