Berlin 2015 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 30: P2: Organic Electronics and Photovoltaics
CPP 30.15: Poster
Dienstag, 17. März 2015, 14:00–16:00, Poster B
Evolution of the Morphology during Functional Stacks Build-up of P3HT:PCBM Inverted Solar Cells — •Weijia Wang1, Stephan Pröller1,2, Martin A. Niedermeier1, Volker Körstgens1, Martine Philipp1, Bo Su1, Shun Yu3,4, Stephan V. Roth3, and Peter Müller-Buschbaum1 — 1TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching — 2Technische Universität München, MSE, Herzig Group, Lichtenbergstr. 4, 85748 Garching — 3DESY, Notkestraße 85, 22603 Hamburg — 4KTH, School of Chemical Science and Engineering, Teknikringen 56-58, 100 44 Stockholm, Sweden
Poly(3-hexylthiophene-2,5-diyl) (P3HT):phenyl-C61-butyric acid methyl ester (PCBM) bulk heterojunction (BHJ) is a well established model system for organic solar cells. Introducing an inverted geometry in a BHJ solar cell has been applied in several groups to achieve stable and more efficient solar cells. However, the basic understanding of the evolution of the morphologies during the complex functional stack assembling is still unknown. Therefore, the gradual evolution of the P3HT:PCBM morphology is investigated by AFM and GISAXS measurements. The inverted P3HT:PCBM BHJ solar cell show an increased power conversion efficiency as compared to the standard geometry, which is explained by the different morphology of the active layer.