Flexible organic photovoltaics using conducting polymer electrodes

Single heterojunction, small-molecule organic photovoltaic devices (OPVs) have been prepared on fully flexible thermoplastic substrates using prepatterned conducting polymer electrodes (similar to 450 Omega/square]). OPVs were fabricated via sequential vacuum vapor deposition of layers of the organic electron donating/hole transporting material: N,N'-(alpha-naphthyl)-N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine and the electron accepting/transporting material: C-60. The resulting photovoltaic cells exhibit white-light power conversion efficiencies of 1% (AM1.5, 97 mW/cm(2)), virtually identical to those fabricated on prepatterned tin-doped indium oxide/glass substrates.