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Deschler, Felix; Riedel, Daniel; Ecker, Bernhard; Hauff, Elizabeth von; Da Como, Enrico; MacKenzie, Roderick C. I. (7. November 2012): Increasing organic solar cell efficiency with polymer interlayers. In: Physical Chemistry Chemical Physics, Vol. 15, No. 3: pp. 764-769


We demonstrate how organic solar cell efficiency can be increased by introducing a pure polymer interlayer between the PEDOT:PSS layer and the polymer: fullerene blend. We observe an increase in device efficiency with three different material systems over a number of devices. Using both electrical characterization and numerical modeling we show that the increase in efficiency is caused by optical absorption in the pure polymer layer and hence efficient charge separation at the polymer bulkheterojunction interface.