Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 19: Poster Session 1 (joint session with BP)

CPP 19.21: Poster

Dienstag, 1. April 2014, 09:30–13:00, P1

Investigation on enhanced efficiency introduced by solvent treatment in PTB7:PC71BM bulk heterojunction organic photovoltaics — •Shuai Guo¹, Biye Cao¹, Weijia Wang¹, Jean-François Moulin², and Peter Müller-Buschbaum¹ — ¹TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748, Garching — ²Helmholtz Zentrum Geesthacht, MLZ, Lichtenbergstr. 1, 85747 Garching

Organic photovoltaics have become of major interest in fundamental researches as well as in applications. Among all the parameters governing the device performance, the morphology of active layers in organic solar cells is of highest importance. In this work the most efficient bulk heterojunction (BHJ) system PTB7:PC71BM with and without solvent treatment is thoroughly investigated. The surface structure of each film is accessed via AFM, and the depth profile of the inner film morphology is revealed by the advanced neutron scattering technique GISANS. Consequently, the complete active layer is probed. The different morphologies formed from solvent treatment are determined and compared with the corresponding performance of each system.