Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 22: Organic Electronics and Photovoltaics I (CPP/DS/HL/O, organized by CPP)
CPP 22.2: Vortrag
Dienstag, 8. März 2016, 14:15–14:30, H37
Links between organic solar cell performance and morphological properties — •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, Munich School of Engineering, Herzig Group, 85748 Garching, Germany — 3Elettra Sincrotrone Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
Many attempts have been made to establish solid links between morphology and performance of organic solar cells (OSCs) as well as the potential suitability of some materials for solar devices. Eventually, many of these attempts have yielded deeper insight into the physics governing excitonic solar cells. In this regard, one of the most innovative approaches consists in the in-operando observation of solar devices under working conditions in time-resolved grazing incidence X-ray scattering experiments. This configuration allows for simultaneous tracking of morphological and electronic properties as a function of time, making the appearing co-dependences among studied parameters more remarkable. The presented work focuses on the first in-operando observations that showed strong correlations between the crystalline state of P3HT:PCBM OSCs' active layers and the open-circuit voltage delivered by the devices. Up to now, this link was only addressed in a multi-step fashion with works featuring interdependences between properties like crystallinity, recombination, energy disorder, open-circuit voltage, or exciton/charge carrier transport.