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Proceedings Paper

Towards exploitation of singlet-exciton fission in organic crystals and potential integration with inorganic semiconductors
Author(s): Kolja K. Kolata; Tobias Breuer; Gregor Witte; Sangam Chatterjee
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Paper 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.

Paper Details

Date Published: 8 May 2017
PDF: 7 pages
Proc. SPIE 10193, Ultrafast Bandgap Photonics II, 101930J (8 May 2017); doi: 10.1117/12.2278673
Show Author Affiliations
Kolja K. Kolata, Philipps-Univ. Marburg (Germany)
Tobias Breuer, Philipps-Univ. Marburg (Germany)
Gregor Witte, Philipps-Univ. Marburg (Germany)
Sangam Chatterjee, Justus-Liebig-Univ. Giessen (Germany)

Published in SPIE Proceedings Vol. 10193:
Ultrafast Bandgap Photonics II
Michael K. Rafailov, Editor(s)

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