8 May 2017 Towards exploitation of singlet-exciton fission in organic crystals and potential integration with inorganic semiconductors
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Abstract
Molecular semiconductors offer intriguing electronic properties. In particular, singlet-exciton fission, the nonradiative decay of one singlet exciton into two triplet excitons effectively doubles the amount of carriers available for, e.g., photovoltaic current generation, thereby effectively surpassing the Shockley-Queisser-limit. An efficient use of singletexciton fission in actual devices, however, requires a detailed understanding of the decay dynamics in donor-acceptor heterostructures. We present a quantitative study on model single-crystalline perfluropentacene at cryogenic temperature and related heterostructures to reveal the intricate interplay between singlet-exciton fission and the nanoscopic molecular arrangement, the role of charge-transfer into and out of molecular systems and discuss the potential for functionalizing inorganic semiconductors. Finally, the potential implications in heterosystems and for functionalization of inorganic semiconductor devices are discussed.
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Kolja K. Kolata, Tobias Breuer, Gregor Witte, Sangam Chatterjee, "Towards exploitation of singlet-exciton fission in organic crystals and potential integration with inorganic semiconductors", Proc. SPIE 10193, Ultrafast Bandgap Photonics II, 101930J (8 May 2017); doi: 10.1117/12.2278673; https://doi.org/10.1117/12.2278673
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