Photophysical properties and optoelectronic device applications of a novelnaphthalene-vinylene type conjugated polymer

We report on photoinduced charge transfer and energy transfer reactions usi ng a new cyano-substituted naphthalene-vinylene type conjugated polymer. Op tical absorption and emission spectra of thin films of mixtures of this pol ymer with the fullerene derivative 1 -(3-(methoxycarbonyl)propyl)- 1-phenyl -(6,6)C-61 (PCBM) exhibit several interesting features such as luminescence quenching and polaronic photoinduced absorption (PIA) of charges indicatin g photoinduced charge transfer. On the other hand this new polymer exhibits energy transfer phenomena in blends with MDMO-PPV (poly((2-methoxy-5-((3,7 -dimethyloctyl)oxy)- 1,4-phenylene)vinylene)). Photovoltaic devices and lig ht emitting diode (LED) devices have been fabricated and characterized usin g this novel conjugated polymer in composite with fullerenes and MDMO-PPV's , respectively.