Dokument-ID Dokumenttyp Verfasser/Autoren Herausgeber Haupttitel Abstract Auflage Verlagsort Verlag Erscheinungsjahr Seitenzahl Schriftenreihe Titel Schriftenreihe Bandzahl ISBN Quelle der Hochschulschrift Konferenzname Quelle:Titel Quelle:Jahrgang Quelle:Heftnummer Quelle:Erste Seite Quelle:Letzte Seite URN DOI Abteilungen OPUS4-31854 Wissenschaftlicher Artikel Pingel, Patrick; Zen, Achmad; Neher, Dieter; Lieberwirth, Ingo; Wegner, Gerhard; Allard, Sybille; Scherf, Ullrich Unexpectedly high field-effect mobility of a soluble, low molecular weight oligoquaterthiophene fraction with low polydispersity Layers made from soluble low molecular weight polythiophene PQT-12 with low polydispersity exhibit a highly ordered structure and charge-carrier mobilities of the order of 10(-3) cm(2)/(V s), which we attribute to its proximity to monodispersity. We propose that polydispersity is a decisive factor with regard to structure formation and transport properties of soluble low molecular weight polythiophenes. 2009 10.1007/s00339-008-4994-0 Institut für Physik und Astronomie OPUS4-34577 Wissenschaftlicher Artikel Lange, Ilja; Kniepert, Juliane; Pingel, Patrick; Dumsch, Ines; Allard, Sybille; Janietz, Silvia; Scherf, Ullrich; Neher, Dieter Correlation between the open circuit voltage and the energetics of organic bulk heterojunction solar cells A detailed investigation of the open circuit voltage (V-OC) of organic bulk heterojunction solar cells comprising three different donor polymers and two different fullerene-based acceptors is presented. Bias amplified charge extraction (BACE) is combined with Kelvin Probe measurements to derive information on the relevant energetics in the blend. On the example of P3HT:PC70BM the influence of composition and preparation conditions on the relevant transport levels will be shown. Moderate upward shifts of the P3HT HOMO depending on crystallinity are observed, but contrarily to common believe, the dependence of V-OC on blend composition and thermal history is found to be largely determined by the change in the PCBM LUMO energy. Following this approach, we quantified the energetic contribution to the V-OC in blends with fluorinated polymers or higher adduct fullerenes. Washington American Chemical Society 2013 7 The journal of physical chemistry letters 4 22 3865 3871 10.1021/jz401971e Institut für Physik und Astronomie