PHOTOLUMINESCENCE AND ELECTROLUMINESCENCE OF NEW PPV-BASED LIGHT-EMITTING COPOLYMERS

Photoluminescence and electroluminescence in new PPV-based copolymers and in their low molar mass model analogs were studied. The separation of the chromophoric units in the copolymer chain by inert aliphatic s pacers ca. 4-12 angstrom in length did not significantly effect the lu minescence behavior. Light emission is due to the radiative deactivati on of singlet excitations located at the chromophoric units generated either by light or formed as a result of the recombination of charge c arriers injected from the adjacent electrodes.