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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 41: Organic Electronics and Photovoltaics IV: OPV (joint session CPP/DS/HL, organized by CPP)
CPP 41.2: Vortrag
Mittwoch, 22. März 2017, 15:30–15:45, ZEU 260
Charge separation and recombination in PBTT-T/fullerene blends and solar devices — •Elisa Collado Fregoso1, Jona Kurpiers1, Samantha Hood2, Ivan Kasal2, James Durrant3, and Dieter Neher1 — 1Institut für Physik und Astronomie, Potsdam University, Potsdam-Golm, Germany — 2Centre for Quantum Computation and Communication Technology, The University of Queensland, Brisbane, Australia — 3Centre for Plastic Electronics, Department of Chemistry, Imperial College London, UK
Organic solar cells, particularly polymer/fullerene solar cells, are an important area of scientific research on the generation of sustainable and renewable energy. However, further optimization of solar device efficiency is still needed to reach commercialization.
In this talk, the relationship between active layer nanostructure and charge separation and recombination kinetics in thin films and solar devices fabricated with mixtures of PBTT-T/fullerene will be established. Via a combined theoretical and experimental kinetic study using Transient absorption spectroscopy (TAS) and Time-delayed collection field (TDCF) we clearly establish the effect of an intermixed versus a more flat interface towards the separation of bound charges and charge recombination regimes. This is further correlated with device performance, thus showing the importance of careful blend nanostructure control.