Lange, A.A.LangeWegener, M.M.WegenerBoeffel, C.C.BoeffelFischer, B.B.FischerWedel, A.A.WedelNeher, D.D.Neher2022-03-042022-03-042010https://publica.fraunhofer.de/handle/publica/22253910.1016/j.solmat.2010.05.0542-s2.0-77955418156Inkjet-printing is a suitable method to generate patterned structures from solvents containing active components. However, the process of inkjet-printing imposes severe limitations on the properties of the inkjet ink. This paper presents a new approach to solvent systems suitable for inkjet-printing common organic solar cell materials, poly(3-hexylthiophene) and 1-(3-methoxycarbonyl)propyl-1-phenyl[6,6]C-61 as active layers in solar cells. Typically, low boiling point chlorinated solvents are used to dissolve P3HT and PCBM because both components are well soluble in these materials. During inkjet-printing, nozzle clogging due to evaporation of the ink in the inkjet print head is reduced when a high boiling point solvent is incorporated. Solar cells with active layers that were printed from an ink with a solvent system of chlorobenzene and trichlorobenzene showed power conversion efficiencies of 2.4% when active layer was dried at 130 degrees C. This compares to 2.6% for spin-coated solar cells from the same materials. In addition, devices with printed passive and printed active layers were prepared and power conversion efficiencies of 1.5% were achieved.en668621journal article