Journal
JOURNAL OF APPLIED PHYSICS
Volume 111, Issue 5, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3688034
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Funding
- ESF EUROCORES
- FWF [I420-N16]
- Austrian Climate and Energy Fund [825467]
- Austrian Science Fund (FWF) [I 420] Funding Source: researchfish
- Austrian Science Fund (FWF) [I420] Funding Source: Austrian Science Fund (FWF)
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We theoretically investigate the thermoelectric properties of zigzag graphene nanoribbons in the presence of extended line defects, substrate impurities, and edge roughness along the nanoribbon's length. A nearest-neighbor tight-binding model for the electronic structure and a fourth nearest-neighbor force constant model for the phonon bandstructure are used. For transport, we employ quantum mechanical non-equilibrium Green's function simulations. Starting from the pristine zigzag nanoribbon structure that exhibits very poor thermoelectric performance, we demonstrate how after a series of engineering design steps the performance can be largely enhanced. Our results could be useful in the design of highly efficient nanostructured graphene nanoribbon-based thermoelectric devices. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3688034]
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