Author/Authors :
Piok، نويسنده , , T. and Brands، نويسنده , , C. and Neyman، نويسنده , , P.J. and Erlacher، نويسنده , , A. and Soman، نويسنده , , C. and Murray، نويسنده , , M.A. and Schroeder، نويسنده , , R. and Graupner، نويسنده , , W. and Heflin، نويسنده , , J.R. and Marciu، نويسنده , , D. F. Drake and D. B. Williams، نويسنده , , A. and Miller، نويسنده , , M.B. and Wang، نويسنده , , H. and Gibson، نويسنده , , H. C. Dorn، نويسنده , , H.C. and Leising، نويسنده , , G. and Guzy، نويسنده ,
Abstract :
We use the technique of ionically self-assembled monolayers (ISAMs) to produce photovoltaic devices of well-controlled thickness and composition. The ISAM nanostructure fabrication method simply involves the alternate dipping of a charged substrate into aqueous cationic and anionic solutions at room temperature. We have employed several approaches to combine the tetrahydrothiophenium precursor of poly(para-phenylene-vinylene) (PPV) with fullerenes and other organic materials. We apply modulation spectroscopy for the electro-optical characterization of the ISAM-devices. The modulation frequency dependence of the photocurrent can be assigned to the influence of trapped charges taking part in the photovoltaic process.
Keywords :
Photovoltaics , polyelectrolytes , Ionically self-assembled monolayers , Poly(para-phenylene-vinylene) , Fullerenes
