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Carrier Multiplication in Graphene
Open accessAbstract
Graphene as a zero-bandgap semiconductor is an ideal model structure to study the carrier relaxation channels, which are inefficient in conventional semiconductors. In particular, it is of fundamental interest to address the question whether Auger-type processes significantly influence the carrier dynamics in graphene. These scattering channels bridge the valence and conduction band allowing carrier multiplication, a process that generates multiple charge carriers from the absorption of a single photon. This has been suggested in literature for improving the efficiency of solar cells. Here we show, based on microscopic calculations within the density matrix formalism, that Auger processes do play an unusually strong role for the relaxation dynamics of photoexcited charge carriers in graphene. We predict that a considerable carrier multiplication takes place, confirming the potential of graphene as a new material for high-efficiency photodevices.
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Cites
The electronic properties of graphene
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Geim, A. K. (2009) · Science · doi:10.1126/science.1158877 · Cited by 13,942
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Two-dimensional material nanophotonics
Xia, F., Wang, H., Xiao, D., Dubey, M., & Ramasubramaniam, A. (2014) · Nature Photonics · doi:10.1038/nphoton.2014.271 · Cited by 3,034
Science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems
Ferrari, A. C., Bonaccorso, F., Fal'ko, V., Novoselov, K. S., Roche, S., Bøggild, P., Borini, S., Koppens, F. H. L., Palermo, V., Pugno, N., et al. (2015) · Nanoscale · doi:10.1039/c4nr01600a · Cited by 3,027
Hot Carrier–Assisted Intrinsic Photoresponse in Graphene
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Snapshots of non-equilibrium Dirac carrier distributions in graphene
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Carrier Relaxation in Epitaxial Graphene Photoexcited Near the Dirac Point
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Self-citationMicroscopic theory of absorption and ultrafast many-particle kinetics in graphene
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Self-citationGeneration of photovoltage in graphene on a femtosecond timescale through efficient carrier heating
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Femtosecond Population Inversion and Stimulated Emission of Dense Dirac Fermions in Graphene
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Ultrafast investigation and control of Dirac and Weyl semimetals
Weber, C. P. (2021) · Journal of Applied Physics · doi:10.1063/5.0035878 · Cited by 55
Metadata
- Authors
- Winzer, T., Knorr, A., & Malic, E.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2010-11-05
- Volume
- 10
- Issue
- 12
- Pages
- 4839-4843
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W1964563420
- Cited by
- 310
- References
- 2
- FWCI
- 11.89
- Type
- journal article
- Language
- en
- Open access
- green
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
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.
