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DOI: 10.1021/nl202318u
¤ OpenAccess: Green
This work has “Green” OA status. This means it may cost money to access on the publisher landing page, but there is a free copy in an OA repository.
Hot Carrier Transport and Photocurrent Response in Graphene
Justin C. W. Song,Mark S. Rudner,C. M. Marcus,L. S. Levitov
Photocurrent
Multiple exciton generation
Graphene
2011
Strong electron–electron interactions in graphene are expected to result in multiple-excitation generation by the absorption of a single photon. We show that the impact of carrier multiplication on photocurrent response is enhanced by very inefficient electron cooling, resulting in an abundance of hot carriers. The hot-carrier-mediated energy transport dominates the photoresponse and manifests itself in quantum efficiencies that can exceed unity, as well as in a characteristic dependence of the photocurrent on gate voltages. The pattern of multiple photocurrent sign changes as a function of gate voltage provides a fingerprint of hot-carrier-dominated transport and carrier multiplication.
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“Hot Carrier Transport and Photocurrent Response in Graphene” is a paper by Justin C. W. Song Mark S. Rudner C. M. Marcus L. S. Levitov published in 2011. It has an Open Access status of “green”. You can read and download a PDF Full Text of this paper here.