scholarly journals Optimal Thermoelectric Power Factor of Narrow-Gap Semiconducting Carbon Nanotubes with Randomly Substituted Impurities

2021 ◽  
Vol 90 (4) ◽  
pp. 044702
Author(s):  
Manaho Matsubara ◽  
Kenji Sasaoka ◽  
Takahiro Yamamoto ◽  
Hidetoshi Fukuyama
Keyword(s):  
Carbon Nanotubes ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Narrow Gap ◽  
Thermoelectric Power Factor

scholarly journals Macroscopic weavable fibers of carbon nanotubes with giant thermoelectric power factor

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Natsumi Komatsu ◽  
Yota Ichinose ◽  
Oliver S. Dewey ◽  
Lauren W. Taylor ◽  
Mitchell A. Trafford ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Fermi Energy ◽  
Performance Enhancement ◽  
Thermoelectric Performance ◽  
Thermoelectric Power Factor ◽  
Large Power ◽  
Energy Tuning

AbstractLow-dimensional materials have recently attracted much interest as thermoelectric materials because of their charge carrier confinement leading to thermoelectric performance enhancement. Carbon nanotubes are promising candidates because of their one-dimensionality in addition to their unique advantages such as flexibility and light weight. However, preserving the large power factor of individual carbon nanotubes in macroscopic assemblies has been challenging, primarily due to poor sample morphology and a lack of proper Fermi energy tuning. Here, we report an ultrahigh value of power factor (14 ± 5 mW m−1 K−2) for macroscopic weavable fibers of aligned carbon nanotubes with ultrahigh electrical and thermal conductivity. The observed giant power factor originates from the ultrahigh electrical conductivity achieved through excellent sample morphology, combined with an enhanced Seebeck coefficient through Fermi energy tuning. We fabricate a textile thermoelectric generator based on these carbon nanotube fibers, which demonstrates high thermoelectric performance, weavability, and scalability. The giant power factor we observe make these fibers strong candidates for the emerging field of thermoelectric active cooling, which requires a large thermoelectric power factor and a large thermal conductivity at the same time.

Solution-processable flexible thermoelectric composite films based on conductive polymer/SnSe0.8S0.2 nanosheets/carbon nanotubes for wearable electronic applications

2018 ◽  
Vol 6 (14) ◽  
pp. 5627-5634 ◽  
Author(s):  
Hyun Ju ◽  
Dabin Park ◽  
Jooheon Kim
Keyword(s):  
Carbon Nanotubes ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Composite Films ◽  
Conductive Polymer ◽  
Solution Processing ◽  
Thermoelectric Power Factor ◽  
Processing Procedure ◽  
Wearable Electronic ◽  
Flexible Thermoelectric

Flexible thermoelectric composite films with a high thermoelectric power factor are achieved via a solution processing procedure.

scholarly journals Centimeter-Long Weavable Fibers of Carbon Nanotubes with Giant Thermoelectric Power Factor

2021 ◽  
Author(s):  
Natsumi Komatsu ◽  
Yota Ichinose ◽  
Oliver Dewey ◽  
Lauren Taylor ◽  
Mitchell Trafford ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Fermi Energy ◽  
Performance Enhancement ◽  
Thermoelectric Performance ◽  
Thermoelectric Power Factor ◽  
Electronic Density ◽  
Large Power

Abstract Low-dimensional materials have recently attracted much interest as thermoelectric materials because of their charge carrier confinement leading to thermoelectric performance enhancement. Carbon nanotubes are promising candidates because of their one-dimensionality in addition to their unique advantages such as flexibility and light weight. However, preserving the large power factor of individual carbon nanotubes in macroscopic assemblies has been challenging, primarily due to poor sample morphology and a lack of proper Fermi energy tuning. Here, we report an unprecedentedly high value of power factor (14±5 mWm-1K-2) for centimeter-long weavable fibers of aligned carbon nanotubes with ultrahigh electrical and thermal conductivity. Our theoretical simulations show that the observed giant power factor originates from the one-dimensional quantum confinement of charge carriers, appearing when the Fermi energy is near a van Hove singularity in the electronic density of states. We fabricated a textile thermoelectric generator based on these carbon nanotube fibers, which demonstrated high thermoelectric performance, weavablity, and scalability. The giant power factor we observed make these fibers strong candidates for the emerging field of thermoelectric active cooling, which requires a large thermoelectric power factor and a large thermal conductivity at the same time.

Preparation and thermoelectric power factor of Ag loaded carbon nanotubes/polyaniline composites

2014 ◽  
Vol 18 (sup4) ◽  
pp. S4-540-S4-543 ◽  
Author(s):  
J. Q. Cao ◽  
Q. Sun ◽  
F. F. Miao ◽  
Y. Lu ◽  
F. P. Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Thermoelectric Power Factor ◽  
Polyaniline Composites

Increasing the thermoelectric power factor of polymer composites using a semiconducting stabilizer for carbon nanotubes

Carbon ◽  
2012 ◽  
Vol 50 (3) ◽  
pp. 885-895 ◽  
Author(s):  
Gregory P. Moriarty ◽  
Jamie N. Wheeler ◽  
Choongho Yu ◽  
Jaime C. Grunlan
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Composites ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Thermoelectric Power Factor

scholarly journals High thermoelectric power factor of pure and vanadium-alloyed chromium nitride thin films

2021 ◽  
pp. 102493
Author(s):  
M.A. Gharavi ◽  
D. Gambino ◽  
A. le Febvrier ◽  
F. Eriksson ◽  
R. Armiento ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Chromium Nitride ◽  
Thermoelectric Power Factor
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