Abstract
Our recent studies have found the unique phenomenon where the dissociation becomes a self-stimulated process occurring at donor:acceptor interfaces in non-fullerene organic solar cells [ITO/ZnO/C60-SAM/PM6:Y6/MoO3/Ag] with the remarkable power-conversion efficiency of 15.6 %. The self-stimulated dissociation was discovered by monitoring the dissociation at D:A (PM6:Y6) interfaces with our magneto-photocurrent measurement. It was observed that, as the excitons are increased, the dissociation at D:A interfaces becomes surprisingly easier, once the non-fullerene Y6 molecules are optically excited. This presents a self-stimulated dissociation where the electron-hole pairs experience an internal stimulation at D:A interfaces to dissociate into free carriers. This presentation will discuss the underlying mechanism of establishing self-stimulated dissociation in non-fullerene organic solar cells towards developing high-efficiency photovoltaics in non-fullerene organic solar cells.
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