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Cited by 359

The DOI matches its Crossref record; 27 of the 27 references it cites were found in a registry or an index.

Microscopic theory of singlet exciton fission. II. Application to pentacene dimers and the role of superexchange

Open access
Berkelbach, Timothy C., Hybertsen, Mark S., Reichman, David R.·2013·The Journal of Chemical Physics

Abstract

We apply our theoretical formalism for singlet exciton fission, introduced in the previous paper [T. C. Berkelbach, M. S. Hybertsen, and D. R. Reichman, J. Chem. Phys. 138, 114102 (2013)]10.1063/1.4794425 to molecular dimers of pentacene, a widely studied material that exhibits singlet fission in the crystal phase. We address a longstanding theoretical issue, namely whether singlet fission proceeds via two sequential electron transfer steps mediated by charge-transfer states or via a direct two-electron transfer process. We find evidence for a superexchange mediated mechanism, whereby the fission process proceeds through virtual charge-transfer states which may be very high in energy. In particular, this mechanism predicts efficient singlet fission on the sub-picosecond timescale, in reasonable agreement with experiment. We investigate the role played by molecular vibrations in mediating relaxation and decoherence, finding that different physically reasonable forms for the bath relaxation function give similar results. We also examine the competing direct coupling mechanism and find it to yield fission rates slower in comparison with the superexchange mechanism for the dimer. We discuss implications for crystalline pentacene, including the limitations of the dimer model.

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Metadata

Authors
Berkelbach, T. C., Hybertsen, M. S., & Reichman, D. R.
Venue
The Journal of Chemical Physics
Published
2013-03-15
Volume
138
Issue
11
Pages
114103-114103
ISSN
  • 0021-9606 (ISSN-L)
  • 1089-7690
OpenAlex
W2166775278
Cited by
359
References
27
FWCI
16.74
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Microscopic theory of singlet exciton fission. II. Application to pentacene dimers and the role of superexchange. https://app.cochat.ai/papers/10.1063/1.4794427
The paper
Berkelbach, T. C., Hybertsen, M. S., & Reichman, D. R. (2013). Microscopic theory of singlet exciton fission. II. Application to pentacene dimers and the role of superexchange. The Journal of Chemical Physics. https://doi.org/10.1063/1.4794427

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.