Journal
SYNTHETIC METALS
Volume 110, Issue 2, Pages 133-140Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0379-6779(99)00284-2
Keywords
photovoltaic cells; conjugated polyelectrolyte; polythiophene; polymer blend
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We describe photovoltaic cells made from a novel conjugated polyelectrolyte, the lithium salt of poly(thiophene-3-acetic acid) (PTAA-Li). The aqueous solubility of this polyelectrolyte allows formation of blend electrodes with a dispersion of the metallic polymer Poly(Ethylene DiOxyThiophene) (PEDOT). The incident monochromatic photon to current conversion efficiency (IPCE) of the cells were improved up to 19% by blending PTAA-Li with PEDOT to modify the ITO electrode, in combination with the low bandgap polymer poly(3-(4-octylphenyl)thiophene) (POPT), and C-60 as electron acceptor. We attribute the increase of efficiency to the improved contact area between the conjugated polyelectrolyte and PEDOT. (C) 2000 Elsevier Science S.A. All rights reserved.
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