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Single heterojunction, small-molecule organic photovoltaic devices (OPVs) have been prepared on fully flexible thermoplastic substrates using prepatterned conducting polymer electrodes(∼450Ω∕◻). OPVs were fabricated via sequential vacuum vapor deposition of layers of the organic electron donating/hole transporting material: N,N′-(α-naphthyl)-N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine and the electron accepting/transporting material: C60. The resulting photovoltaic cells exhibit white-light power conversion efficiencies of 1% (AM1.5, 97mW∕cm2), virtually identical to those fabricated on prepatterned tin-doped indium oxide/glass substrates.
Kushto et al. (Tue,) studied this question.