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- W1987755308 abstract "For efficient charge generation in organic solar cells, photogenerated excitons must migrate to a donor/acceptor interface where they can be dissociated. This migration is traditionally presumed to be based on diffusion through the absorber material. Herein we study an alternative migration route--two-step exciton dissociation--whereby the exciton jumps from the donor to acceptor before charge creation takes place. We study this process in a series of multilayer donor/barrier/acceptor samples, where either poly(3-hexylthiophene) (P3HT) or copper phthalocyanine (CuPc) is the donor, fullerene (C60) is the acceptor, and N,N-diphenyl-N,N-bis(3-methylphenyl)-[1,1-bisphenyl]-4,4-diamine (TPD) acts as a barrier to energy transfer. By varying the thickness of the barrier layer, we find that energy transfer from P3HT to C60 proceeds over large distances (∼50% probability of transfer across a 11 nm barrier), and that this process is consistent with long-range Förster resonance energy transfer (FRET). Finally, we demonstrate a fundamentally different architecture concept that utilizes the two-step mechanism to enhance performance in a series of P3HT/CuPc/C60 devices." @default.
- W1987755308 created "2016-06-24" @default.
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- W1987755308 date "2010-08-24" @default.
- W1987755308 modified "2023-09-23" @default.
- W1987755308 title "Photovoltaic Charge Generation in Organic Semiconductors Based on Long-Range Energy Transfer" @default.
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- W1987755308 doi "https://doi.org/10.1021/nn101106b" @default.
- W1987755308 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20735062" @default.
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