The electroluminescence of J-aggregates was detected in polymer systems dop
ed with cyanine dye molecules. J-aggregate/polymer composites exhibiting in
tense absorption band with a maximum in the red range were developed on the
base of polyimides and a copolymer formed from phenylacetylene and 4-methy
lcoumarin-4-pentynoate. Efficient electrolumunescence was revealed in these
systems. It was found out that J-aggregates play an active role in charge
carrier transport in the composite materials.