Investigating enhanced thermoelectric performance of graphene-based nano-structures

Nanoscale
Md Sharafat HossainEfstratios Skafidas

Abstract

Recently, it has been demonstrated that graphene nano-ribbons (GNRs) exhibit superior thermoelectric performance compared to graphene sheets. However, the underlying mechanism behind this enhancement has not been systematically investigated and significant opportunity remains for further enhancement of the thermoelectric performance of GNRs by optimizing their charge carrier concentration. In this work, we modulate the carrier concentration of graphene-based nano-structures using a gate voltage and investigate the resulting carrier-concentration-dependent thermoelectric parameters using the Boltzmann transport equations. We investigate the effect of energy dependent scattering time and the role of substrate-induced charge carrier fluctuation in optimizing the Seebeck coefficient and power factor. Our approach predicts the scattering mechanism and the extent of the charge carrier fluctuation in different samples and explains the enhancement of thermoelectric performance of GNR samples. Subsequently, we propose a route towards the enhancement of thermoelectric performance of graphene-based devices which can also be applied to other two-dimensional materials.

References

Oct 23, 2004·Science·K S NovoselovA A Firsov
Feb 21, 2008·Nano Letters·Alexander A BalandinChun Ning Lau
Jan 24, 2009·Nature Materials·Cronin B Vining
Apr 28, 2009·Physical Review Letters·Yuri M ZuevPhilip Kim
Jun 13, 2009·Physical Review Letters·Peng WeiJing Shi
Dec 8, 2010·Nano Letters·David K TaggartReginald M Penner
Jul 23, 2011·Nature Materials·Alexander A Balandin
Apr 20, 2012·ACS Nano·Qiaoliang Bao, Kian Ping Loh
Apr 18, 2013·Nature Communications·Myung-Ho BaeEric Pop
Mar 13, 2014·Nano Letters·Dohun KimMichael S Fuhrer
Dec 3, 2016·Proceedings of the National Academy of Sciences of the United States of America·Junxi DuanEva Y Andrei

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Citations

Oct 17, 2019·Nanoscale·Travis G NovakSeokwoo Jeon
Dec 29, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Zuoyuan DongXing Wu

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Methods Mentioned

BETA
scanning electron microscopy
electron-beam lithography
chip

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