Journal
APPLIED PHYSICS LETTERS
Volume 77, Issue 17, Pages 2635-2637Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1320022
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Solar cells made from spin-coated bilayer thin-film heterojunctions of poly(p-phenylene vinylene) and poly(benzimidazobenzophenanthroline ladder) were found to have photovoltaic charge collection efficiency as high as 49%. The power conversion efficiency varied from 1.4% under sunlight illumination to 2.0% at the peak wavelength. A space-charge region around the polymer/polymer interface, Ohmic contacts at the electrodes, and complementary absorption bands of the semiconducting polymers, play important roles in the efficient charge collection in the photocells. (C) 2000 American Institute of Physics. [S0003-6951(00)02943-0].
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