Enhanced thermoelectric performance of graphene nanoribbon-based devices

Md Sharafat Hossain, Duc Hau Huynh, Phuong Duc Nguyen, Liming Jiang, Thanh Cong Nguyen, Feras Al-Dirini, Faruque M. Hossain, Efstratios Skafidas

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

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 (S2G) 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.

Original languageEnglish
Article number125106
JournalJournal of Applied Physics
Volume119
Issue number12
DOIs
StatePublished - 28 Mar 2016
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2016 AIP Publishing LLC.

ASJC Scopus subject areas

  • General Physics and Astronomy

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