Hot-carrier photocurrent effects at graphene–metal interfaces
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Hot-carrier.pdf
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7.6 MB
Format
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Checksum (MD5)
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Author(s)
Ma, Qiong
Jarillo-Herrero, Pablo
Tielrooij, K. J.
Massicotte, M.
Piatkowski, L.
Woessner, A.
van Hulst, N. F.
Koppens, Frank Henricus Louis
Date Issued
April 2015
Journal
Journal of Physics: Condensed Matter
Publisher
IOP Publishing
Citation
Tielrooij, K J, M Massicotte, L Piatkowski, A Woessner, Q Ma, P Jarillo-Herrero, N F van Hulst, and F H L Koppens. “Hot-Carrier Photocurrent Effects at Graphene–metal Interfaces.” J. Phys.: Condens. Matter 27, no. 16 (April 2, 2015): 164207.
Version
Original manuscript
Abstract
Photoexcitation of graphene leads to an interesting sequence of phenomena, some of which can be exploited in optoelectronic devices based on graphene. In particular, the efficient and ultrafast generation of an electron distribution with an elevated electron temperature and the concomitant generation of a photo-thermoelectric voltage at symmetry-breaking interfaces is of interest for photosensing and light harvesting. Here, we experimentally study the generated photocurrent at the graphene–metal interface, focusing on the time-resolved photocurrent, the effects of photon energy, Fermi energy and light polarization. We show that a single framework based on photo-thermoelectric photocurrent generation explains all experimental results.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1088/0953-8984/27/16/164207
