Journal article 900 views 202 downloads
Enhanced thermoelectric performance of twisted bilayer graphene nanoribbons junction
Shuo Deng,
Xiang Cai,
Yan Zhang,
Lijie Li 
Carbon, Volume: 145, Pages: 622 - 628
Swansea University Author:
Lijie Li
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DOI (Published version): 10.1016/j.carbon.2019.01.089
Abstract
We investigate the electron transport and thermoelectric property of twisted bilayer graphene nanoribbon junction (TBGNRJ) in 0°, 21.8°, 38.2° and 60° rotation angles by first principles calculation with Landauer-Buttiker and Boltzmann theories. It is found that TBGNRJs exhibit a strong reduction of...
| Published in: | Carbon |
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| ISSN: | 0008-6223 |
| Published: |
2019
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa48574 |
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| Abstract: |
We investigate the electron transport and thermoelectric property of twisted bilayer graphene nanoribbon junction (TBGNRJ) in 0°, 21.8°, 38.2° and 60° rotation angles by first principles calculation with Landauer-Buttiker and Boltzmann theories. It is found that TBGNRJs exhibit a strong reduction of thermal conductance compared with the single graphene nanoribbon (GNR) and negative differential resistance (NDR) in 21.8° and 38.2° rotation angles under 0.2 V bias voltage. More importantly, three peak ZT values of 2.0, 2.7 and 6.1 can be achieved in the 21.8° rotation angle at 300 K. The outstanding ZT values of TBGNRJs are interpreted as the combination of the reduced thermal conductivity and enhanced electrical conductivity at optimized angles. |
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| College: |
Faculty of Science and Engineering |
| Start Page: |
622 |
| End Page: |
628 |