Dresden 2017 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 35: Focus: Polymer Crystallization - from Model Systems to New Materials I

CPP 35.3: Talk

Wednesday, March 22, 2017, 10:45–11:00, ZEU 222

In-operando study of changes in the crystalline parts of P3HT:PCBM solar cells — Daniel Moseguí González¹, Christoph J. Schaffer¹, Stephan Pröller², Johannes Schlipf¹, Lin Song¹, Sigrid Bernstorff³, Eva M. Herzig², and •Peter Müller-Buschbaum¹ — ¹TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching, Germany — ²TU München, MSE, Lichtenbergstr. 4, 85748 Garching — ³Elettra-Sincrotrone Trieste, 34149 Basovizza, Italy

Organic solar cells based on poly(3-hexylthiophen-2,5-diyl):phenyl-C60-butyric acid methyl ester (P3HT:PCBM) have developed into a well-controlled model system for studying fundamental questions, although device efficiencies of other blends using low band gap polymers demonstrated significantly higher device efficiencies. Based on an in-operando investigation of a P3HT:PCBM-based solar cell we address for the first time the correlation between the crystalline state of the materials in the organic solar cell and the open circuit voltage probed in the IV-characteristics. We use in-operando grazing incidence wide angle x-ray scattering to probe changes in the crystalline parts of the active layer. The findings give a better understanding of aging of organic solar cells during operation.