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3 November 2006 Alternative device concepts for future requirements of organic photovoltaic cells
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The challenge to reversing the layer sequence of organic photovoltaics (OPVs) is to prepare a selective contact bottom cathode and to achieve a suitable morphology for carrier collection in the inverted structure. We report the creation of an efficient electron selective bottom contact based on a solution-processed Titania layer on top of Indium Tin Oxide. The use of o-xylene as the casting solvent creates an efficient carrier collection network with little vertical phase segregation, providing sufficient performance for both regular as well as inverted solar cells. We demonstrate inverted layer sequence OPVs with AM 1.5-calibrated power conversion efficiencies of over 3%.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Christoph Waldauf, Patrick Denk, Mauro Morana, Christoph J. Brabec, Kevin Coakley, Pavel Schilinsky, and Stelios A. Choulis "Alternative device concepts for future requirements of organic photovoltaic cells", Proc. SPIE 6334, Organic Photovoltaics VII, 63340A (3 November 2006);

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