Cel Organic photovoltaics (OPVs) have gained a lot of attention as versatile and cheap alternatives to their inorganic counterparts. Great improvement has been made by tuning the electronic properties of donor, D, and acceptor, A, molecules. Equally important for high efficiency devices, is the morphology and orientation of D and A molecules in the active layer because: (1) excitons created upon absorption have a finite migration length (5-20 nm), D and A domains therefore have to be small and (2) both domains have to fully percolate the active layer in order to achieve efficient charge transport and collection at the electrodes. So far, the D-A morphology has mainly been optimized by altering processing methods, such as spin-casting, (organic) vapor phase deposition and vacuum thermal evaporation, and by post-deposition annealing (e.g. using solvent vapor and / or temperature).Here we propose to encode the morphology directly into the chemical structure of the D and A molecules by using self-assembly. This way, molecular recognition between the molecules determines the morphology of the active layer. To this end, pyrene derivatives with enhanced π-π stacking have been reported, as well as molecules incorporating hydrogen-bonding motifs coupled to electronically active segments. These types of self-assembled devices had enhanced efficiency compared to their non-assembled analogues, and clearly show that self-assembly provides a new level of control over morphology.In this project, we will use self-assembling D molecules bearing large π-π stacking motifs together with hydrogen bonding arrays to hierarchically organize both D and A molecules and creating a high interfacial area, while maintaining percolation. This way exciton diffusion and splitting will be facilitated, hole mobility will be enhanced by improved interconnection of D molecules and recombination will decrease, leading to higher power conversion efficiency. Dziedzina nauki engineering and technologyenvironmental engineeringenergy and fuelsrenewable energysolar energyphotovoltaic Program(-y) FP7-PEOPLE - Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Temat(-y) FP7-PEOPLE-2013-IEF - Marie-Curie Action: "Intra-European fellowships for career development" Zaproszenie do składania wniosków FP7-PEOPLE-2013-IEF Zobacz inne projekty w ramach tego zaproszenia System finansowania MC-IEF - Intra-European Fellowships (IEF) Koordynator UNIVERSITE DE STRASBOURG Wkład UE € 194 046,60 Adres RUE BLAISE PASCAL 4 67081 Strasbourg Francja Zobacz na mapie Region Grand Est Alsace Bas-Rhin Rodzaj działalności Higher or Secondary Education Establishments Kontakt administracyjny Sandrine Schott-Carrière (Mrs.) Linki Kontakt z organizacją Opens in new window Strona internetowa Opens in new window Koszt całkowity Brak danych
