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Author Hossain, Md Sharafat ♦ Huynh, Duc Hau ♦ Nguyen, Phuong Duc ♦ Jiang, Liming ♦ Nguyen, Thanh Cong ♦ Al-Dirini, Feras ♦ Hossain, Faruque M. ♦ Skafidas, Efstratios
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ COMPARATIVE EVALUATIONS ♦ COMPUTERIZED SIMULATION ♦ ELECTRONIC EQUIPMENT ♦ GRAPHENE ♦ NANOSTRUCTURES ♦ PERFORMANCE ♦ POWER FACTOR ♦ ROUGHNESS ♦ THERMOELECTRIC PROPERTIES
Abstract There have been numerous theoretical studies on exciting thermoelectric properties of graphene nano-ribbons (GNRs); however, most of these studies are mainly based on simulations. In this work, we measure and characterize the thermoelectric properties of GNRs and compare the results with theoretical predictions. Our experimental results verify that nano-structuring and patterning graphene into nano-ribbons significantly enhance its thermoelectric power, confirming previous predictions. Although patterning results in lower conductance (G), the overall power factor (S{sup 2}G) increases for nanoribbons. We demonstrate that edge roughness plays an important role in achieving such an enhanced performance and support it through first principles simulations. We show that uncontrolled edge roughness, which is considered detrimental in GNR-based electronic devices, leads to enhanced thermoelectric performance of GNR-based thermoelectric devices. The result validates previously reported theoretical studies of GNRs and demonstrates the potential of GNRs for the realization of highly efficient thermoelectric devices.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-03-28
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 119
Issue Number 12


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