Berlin 2015 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 30: P2: Organic Electronics and Photovoltaics
CPP 30.5: Poster
Dienstag, 17. März 2015, 14:00–16:00, Poster B
The effect of crystallization on the charge mobility through P3HT-PC70BM films — •Kaiwan Jahanshahi1, Vladimir Dyakonov1,2, and Carsten Deibel3 — 1Experimental Physics VI, Julius-Maximilian University of Würzburg, 97074 Würzburg, Germany — 2Bavarian Center for Applied Energy Research (ZAE Bayern), 97074 Würzburg, Germany — 3Institut für Physik Optik und Photonik kondensierter Materie, Technische Universität Chemnitz, 09107 Chemnitz, Germany
Poly(3-hexylthiophene) (P3HT) and fullerene (PC70BM) mixtures are one of the most important semiconducting polymer-fullerene blend materials in organic photovoltaic. Because of the intricacy of the crystal formation in these type of polymer-fullerene blends, the relationship between their crystalline structure and mobility of the charges through their bulk structure is not comprehensively discussed. In this study we have used a well controlled process of solvent annealing technique in order to grow well-ordered P3HT-PC70BM spherulites as an active layer in our solar cells which enabled us to employ time of flight (TOF) and OTRACE techniques to measure the mobility of the charges through the bulk of the crystalline film and perpendicular to the plane of the spherulitic crystals and compare them to the mobility of the charges through an amorphous active layer.