scholarly journals Thermoelectric properties of polycrystalline graphene nanoribbons

2019 ◽  
Vol 68 (24) ◽  
pp. 247202
Author(s):  
Yi Xu ◽  
Xiao-Yan Xu ◽  
Wei Zhang ◽  
Tao Ouyang ◽  
Chao Tang
Keyword(s):  
Thermoelectric Properties ◽  
Graphene Nanoribbons

Thermoelectric properties of graphene nanoribbons with surface roughness

2018 ◽  
Vol 112 (23) ◽  
pp. 233107 ◽  
Author(s):  
Huaping Xiao ◽  
Wei Cao ◽  
Tao Ouyang ◽  
Xiaoyan Xu ◽  
Yingchun Ding ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Thermoelectric Properties ◽  
Graphene Nanoribbons

Thermoelectric properties of graphene nanoribbons, junctions and superlattices

2010 ◽  
Vol 22 (37) ◽  
pp. 372202 ◽  
Author(s):  
Y Chen ◽  
T Jayasekera ◽  
A Calzolari ◽  
K W Kim ◽  
M Buongiorno Nardelli
Keyword(s):  
Thermoelectric Properties ◽  
Graphene Nanoribbons

Ballistic thermoelectric properties in double-bend graphene nanoribbons

2014 ◽  
Vol 378 (20) ◽  
pp. 1383-1387 ◽  
Author(s):  
Ke-Min Li ◽  
Zhong-Xiang Xie ◽  
Ka-Lin Su ◽  
Wen-Hua Luo ◽  
Yong Zhang
Keyword(s):  
Thermoelectric Properties ◽  
Graphene Nanoribbons

scholarly journals Impurity Substitution Enhances Thermoelectric Figure of Merit in Zigzag Graphene Nanoribbons

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Saeideh Ramezani Akbarabadi ◽  
Mojtaba Madadi Asl
Keyword(s):  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Density Functional ◽  
Graphene Nanoribbons ◽  
Electrical Conductance ◽  
Thermal Conductance ◽  
Simultaneous Increase ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
Zigzag Graphene Nanoribbons

The thermoelectric properties of zigzag graphene nanoribbons (ZGNRs) are sensitive to chemical modification. In this study, we employed density functional theory (DFT) combined with the nonequilibrium green’s function (NEGF) formalism to investigate the thermoelectric properties of a ZGNR system by impurity substitution of single and double nitrogen (N) atoms into the edge of the nanoribbon. N-doping changes the electronic transmission probability near the Fermi energy and suppresses the phononic transmission. This results in a modified electrical conductance, thermal conductance, and thermopower. Ultimately, simultaneous increase of the thermopower and suppression of the electron and phonon contributions to the thermal conductance leads to the significant enhancement of the figure of merit in the perturbed (i.e., doped) system compared to the unperturbed (i.e., nondoped) system. Increasing the number of dopants not only changes the nature of transport and the sign of thermopower but also further suppresses the electron and phonon contributions to the thermal conductance, resulting in an enhanced thermoelectric figure of merit. Our results may be relevant for the development of ZGNR devices with enhanced thermoelectric efficiency.

Spectacular enhancement of thermoelectric phenomena in chemically synthesized graphene nanoribbons with substitution atoms

2016 ◽  
Vol 18 (27) ◽  
pp. 18246-18254 ◽  
Author(s):  
K. Zberecki ◽  
R. Swirkowicz ◽  
M. Wierzbicki ◽  
J. Barnaś
Keyword(s):  
Thermoelectric Properties ◽  
Graphene Nanoribbons ◽  
Specific Geometry

We analyze theoretically the transport and thermoelectric properties of graphene nanoribbons of a specific geometry, which have been synthesized recently from polymers [Cai, et al., Nature, 2011, 466, 470].

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