Berlin 2015 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 36: Poster Session I
DS 36.45: Poster
Donnerstag, 19. März 2015, 09:30–12:00, Poster A
Transmission electron microscopy study of novel DCV5T/C60 blend films for organic solar cells — •Mona Sedighi1, Petr Formanek2, Markus Löffler1, and Ehrenfried Zschech1,3 — 1Dresden Center for Nanoanalysis, Technische Universität Dresden, Dresden, Germany — 2Leibniz-Institut für Polymerforschung Dresden, Dresden, Germany — 3Fraunhofer Institute for Ceramic Technologies and Systems, Dresden, Germany
Organic solar cells gained increasing attention as renewable energy conversion elements due to the great potential of low-cost production and flexible processing technologies. However, their performance and reliability are still worse compared to the inorganic counterparts. Therefore, one of the major tasks in this research field is the development of new materials to reach higher performance. Recently, novel methyl-substituted dicyanovinylcapped quinquethiophenes (DCV5T) have been introduced as small-molecule organic donors in the blend of bulk heterojunction solar cells, which increase power conversion efficiencies when combined with fullerenes (C60) as the acceptor phase. The heterojunction organic solar cells, made of DCV5T/C60 blend perform better than those of zinc phthalocyanine(ZnPc) and C60 blend. Transmission electron microscopy analysis of pure DCV5T variations and DCV5T/C60 blend films gives insights into the morphology of these novel compounds that can be used to build strong structure-property relationships in order to rationalize their improved photovoltaic performance. Here we report analytical TEM characterization (EFTEM and EELS) of the DCV5T/C60 blend.