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- W4280496619 abstract "Designing molecular materials with very large exciton diffusion lengths would remove some of the intrinsic limitations of present-day organic optoelectronic devices. Yet, the nature of excitons in these materials is still not sufficiently well understood. Here we present Frenkel exciton surface hopping, an efficient method to propagate excitons through truly nano-scale materials by solving the time-dependent Schrödinger equation coupled to nuclear motion. We find a clear correlation between diffusion constant and quantum delocalization of the exciton. In materials featuring some of the highest diffusion lengths to date, e.g. the non-fullerene acceptor Y6, the exciton propagates via a transient delocalization mechanism, reminiscent to what was recently proposed for charge transport. Yet, the extent of delocalization is rather modest, even in Y6, and found to be limited by the relatively large exciton reorganization energy. On this basis we chart out a path for rationally improving exciton transport in organic optoelectronic materials." @default.
- W4280496619 created "2022-05-22" @default.
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- W4280496619 date "2022-05-19" @default.
- W4280496619 modified "2023-10-17" @default.
- W4280496619 title "Exciton transport in molecular organic semiconductors boosted by transient quantum delocalization" @default.
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- W4280496619 doi "https://doi.org/10.1038/s41467-022-30308-5" @default.
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