The TU Ilmenau, Department of Experimental Physics I, has been conducting research on polymer semiconductors for more than 7 years, in collaboration with other leading partners inside and outside of Germany within this field. Currently, the Organic Solar Cell group is involved in several DFG and BMBF funded projects, dealing with both, fundamental and applied research on polymer photovoltaics. For example, it works closely together with the TITK-Rudolstadt (An-Institute of TU Ilmenau) on flexible solar cell modules.