Tunable nano Peltier cooling device from geometric effects using a single graphene nanoribbon

Abstract

Based on the phenomenon of curvature-induced doping in graphene we propose a class of Peltier cooling devices, produced by geometrical effects, without gating. We show how a graphene nanoribbon laid on an array of curved nano cylinders can be used to create a targeted and tunable cooling device. Using two different approaches, the Nonequilibrium Green’s Function (NEGF) method and experimental inputs, we predict that the cooling power of such a device can approach the order of kW/cm2, on par with the best known techniques using standard superlattice structures. The structure proposed here helps pave the way toward designing graphene electronics which use geometry rather than gating to control devices.

Graphical abstract

Keywords

Peltier cooling device / graphene nanoribbon / superlattice structure / graphene electronics / cooling power / Nonequilibrium Green’s Function (NEGF)

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Higher Education Press and Springer-Verlag Berlin Heidelberg