A COMPARATIVE-STUDY OF DC ELECTROCHEMILUMINESCENCE FROM POLY(2-METHOXY-5-DODECYLOXY-P-PHEYNYLENEVINYLENE) IN SOLUTION AND IN SOLID POLYMER ELECTROLYTE MEDIA

D-C electrochemiluminescence (ECL) of poly(2-methoxy-5-dodecyloxy-p-ph eynylenevinylene) was observed for the film immersed in an electrolyti c solution and for its dry composite film with a solid polymer electro lyte using interdigitated gold electrodes spaced 5 mu m apart. The coi ncidence of the onset voltages and spectra of tile ECL suggests that b oth ECLs can be interpreted by the same mechanism: negatively and posi tively charged excited species of the polymer are formed at the cathod e and anode, respectively, and recombine between the electrodes to for m singlet excitons which radiatively relax to the sound state.