| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Study on the Thermoelectric Properties of n-type Doped Carbon Nanotube with Different Diameters and the Fabrication of Their Devices |
| JIN Lulu1, SUN Tingting1, WANG Lianjun1,2, JIANG Wan1,2,3
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1 State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
2 Engineering Research Center of Advanced Glasses Manufacturing Technology, Ministry of Education, Donghua University,Shanghai 201620, China
3 Institute of Functional Materials, Donghua University, Shanghai 201620, China |
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Abstract The high conductivity and excellent toughness of carbon nanotube (CNT) make them have many advantages in the field of flexible thermoelectrics. Their tube diameter, length and other characteristics have different effects on the thermoelectric performance. The insight into the above content plays practice guiding role in preparing high-performance CNT thermoelectric materials. This work mainly studied the thermoelectric properties of n-type doped CNT with different tube diameters. The results showed that the n-type doping effect of CNT film decreased with the increase of tube diameter. Single-walled carbon nanotube (SWCNT) samples with a tube diameter of 1—2 nm and a length of 5—30 μm had the best thermoelectric performance after being doped with a 20%(mass fraction) PEI solution for 12 hours, and its power factor can reach 51.5 μW·m-1·K-2. Based on the optimized thermoelectric materials, a thermoelectric device was fabricated, which had a maximum output power of 21.5 nW when the temperature difference was 8.3 K. The research provides a reference for achieving n-doping effect and optimizing the thermoelectric properties of CNT.
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Published: 25 March 2022
Online: 2022-03-21
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| Fund:Shanghai Committee of Science and Technology (18JC1411200). |
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2022, Vol. 36 
