Regensburg 2013 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 28: Poster Session: Graphen; Transport properties; Transport in high magnetic fields / Quantum Hall effect; Metal-semiconductor hybrid systems
HL 28.9: Poster
Montag, 11. März 2013, 16:00–20:00, Poster A
Photocurrent in epitaxial graphene — •Stefan Link1, Peter Wehrfritz1, Felix Fromm1, Stefan Malzer2, and Thomas Seyller1,3 — 1FAU Erlangen-Nürnberg, Lehrstuhl für Technische Physik — 2FAU Erlangen-Nürnberg, Lehrstuhl für Angewandte Physik — 3TU Chemnitz, Institut für Physik
Graphene, the two-dimensional sheet of carbon promises a lot for electronic applications. For example, Mueller et al. [1] have demonstrated the potential of graphene for high-speed optical communications. In particular, they investigated the behavior of graphene-based photodetectors. Epitaxial graphene on SiC, which can be grown on a wafer scale [2], is the ideal platform for the development of such devices. We have investigated the photocurrent generation in graphene-metal junctions using different types of epitaxial graphene grown on SiC(0001). The photoresponse was shown to be due to a photovoltaic effect and improved by optimization of device design and by the use of quasi-freestanding graphene [3].
[1] T. Mueller et al., Nat. Photon. 4 (2010) 297. [2] K. V. Emtsev et al., Nat. Mater. 8 (2009) 203. [3] C. Riedl et al., Phys. Rev. Lett. 103 (2010) 246804.