Enhancing the thermoelectric figure of merit in engineered graphene nanoribbons

被引：65

作者：

Sadeghi, Hatef ^{[1
]}

Sangtarash, Sara ^{[1
]}

Lambert, Colin J. ^{[1
]}

机构：

[1] Univ Lancaster, Dept Phys, Quantum Technol Ctr, Lancaster LA1 4YB, England

来源：

BEILSTEIN JOURNAL OF NANOTECHNOLOGY | 2015年 / 6卷

基金：

英国工程与自然科学研究理事会;

关键词：

graphene nanoribbons; quantum transport; thermal conductance; thermoelectric figure of merit; thermopower; THERMAL-PROPERTIES; CONDUCTANCE; DEFECT;

D O I：

10.3762/bjnano.6.119

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We demonstrate that thermoelectric properties of graphene nanoribbons can be dramatically improved by introducing nanopores. In monolayer graphene, this increases the electronic thermoelectric figure of merit ZT(e) from 0.01 to 0.5. The largest values of ZT(e) are found when a nanopore is introduced into bilayer graphene, such that the current flows from one layer to the other via the inner surface of the pore, for which values as high as ZT(e) = 2.45 are obtained. All thermoelectric properties can be further enhanced by tuning the Fermi energy of the leads.

引用

页码：1176 / 1182

页数：7

共 29 条

[1] Phononics in low-dimensional materials [J].

Balandin, Alexander A. ;

Nika, Denis L. .

MATERIALS TODAY, 2012, 15 (06) :266-275

[2]

Balandin AA, 2011, NAT MATER, V10, P569, DOI [10.1038/nmat3064, 10.1038/NMAT3064]

[3] Giant Thermoelectric Effect in Graphene-Based Topological Insulators with Heavy Adatoms and Nanopores [J].

Chang, Po-Hao ;

Bahramy, Mohammad Saeed ;

Nagaosa, Naoto ;

Nikolic, Branislav K. .

NANO LETTERS, 2014, 14 (07) :3779-3784

[4] Edge currents and nanopore arrays in zigzag and chiral graphene nanoribbons as a route toward high-ZT thermoelectrics [J].

Chang, Po-Hao ;

Nikolic, Branislav K. .

PHYSICAL REVIEW B, 2012, 86 (04)

[5]

Datta S, 2005, Quantum transport: atom to transitor, DOI DOI 10.1017/CBO9781139164313

[6] Thermal conductivity of graphene ribbons from equilibrium molecular dynamics: Effect of ribbon width, edge roughness, and hydrogen termination [J].

Evans, William J. ;

Hu, Lin ;

Keblinski, Pawel .

APPLIED PHYSICS LETTERS, 2010, 96 (20)

[7] Lattice dynamics of a disordered solid-solid interface [J].

Fagas, G ;

Kozorezov, AG ;

Lambert, CJ ;

Wigmore, JK ;

Peacock, A ;

Poelaert, A ;

den Hartog, R .

PHYSICAL REVIEW B, 1999, 60 (09) :6459-6464

[8] GOLLUM: a next-generation simulation tool for electron, thermal and spin transport [J].

Ferrer, J. ;

Lambert, C. J. ;

Garcia-Suarez, V. M. ;

Manrique, D. Zs ;

Visontai, D. ;

Oroszlany, L. ;

Rodriguez-Ferradas, R. ;

Grace, I. ;

Bailey, S. W. D. ;

Gillemot, K. ;

Sadeghi, Hatef ;

Algharagholy, L. A. .

NEW JOURNAL OF PHYSICS, 2014, 16

[9] Heat conduction in graphene: experimental study and theoretical interpretation [J].

Ghosh, S. ;

Nika, D. L. ;

Pokatilov, E. P. ;

Balandin, A. A. .

NEW JOURNAL OF PHYSICS, 2009, 11

[10] Thermoelectric properties of finite graphene antidot lattices [J].

Gunst, Tue ;

Markussen, Troels ;

Jauho, Antti-Pekka ;

Brandbyge, Mads .

PHYSICAL REVIEW B, 2011, 84 (15)

← 1 2 3 →