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Organic solar cells are a promising way towards large-area and low-price photovoltaic systems. The main advantages are the easy preparation, low process temperatures, low-cost materials and processing technology and the possibility to produce flexible devices on plastic substrates.

A key topic of our group is the investigation of the controlled doping of organic thin films and the impact of the doping on the properties of prototype organic solar cells. Furthermore we have developed a new class of absorber materials based on oligothiophenes with electron withdrawing substituents. These materials are specially designed for organic solar cell applications.