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5 May 2008Transparent electrode materials for solar cells
Alternatives for replacing the expensive ITO are explored and Poly(ethylene dioxythiophene):polystyrene
sulfonate (PEDOT:PSS) is introduced as one possibility. We present the first small-molecule organic solar
cells employing only PEDOT:PSS as transparent electrode. Solar cells on glass and on flexible plastic foil
were prepared, using a p-doped hole transporting material, zinc phthalocyanine (ZnPc) and C60 as donor-acceptor
heterojunction, and an exciton blocking layer. Different methods to structure the PEDOT:PSS
electrodes were investigated and are presented. As proof of principle, non-optimized prototype cells with
efficiencies of over 0.7% on glass and 0.9% on flexible plastic foil substrate were obtained.
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Jan Meiss, Christian L. Uhrich, Karsten Fehse, Steffen Pfuetzner, Moritz K. Riede, Karl Leo, "Transparent electrode materials for solar cells," Proc. SPIE 7002, Photonics for Solar Energy Systems II, 700210 (5 May 2008); https://doi.org/10.1117/12.781275