Tailored semiconducting carbon nanotube networks with enhanced thermoelectric properties

被引:291
作者
Avery, Azure D. [1 ]
Zhou, Ben H. [1 ]
Lee, Jounghee [2 ]
Lee, Eui-Sup [2 ]
Miller, Elisa M. [1 ]
Ihly, Rachelle [1 ]
Wesenberg, Devin [3 ]
Mistry, Kevin S. [1 ]
Guillot, Sarah L. [1 ,4 ]
Zink, Barry L. [3 ]
Kim, Yong-Hyun [2 ]
Blackburn, Jeffrey L. [1 ]
Ferguson, Andrew J. [1 ]
机构
[1] Natl Renewable Energy Lab, Chem & Nanosci Ctr, Golden, CO 80401 USA
[2] Korea Adv Inst Sci & Technol, Grad Sch Nanosci & Technol, Daejeon 305701, South Korea
[3] Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA
[4] Univ Wisconsin, Dept Chem, 1101 Univ Ave, Madison, WI 53706 USA
基金
美国国家科学基金会; 新加坡国家研究基金会;
关键词
CONDUCTING POLYMER POLY(3,4-ETHYLENEDIOXYTHIOPHENE); AUGMENTED-WAVE METHOD; THIN-FILMS; THERMAL-CONDUCTIVITY; CHARGE-TRANSFER; SOLAR-CELLS; POWER; TRANSPORT; DIAMETER; DENSITY;
D O I
10.1038/NENERGY.2016.33
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Thermoelectric power generation, allowing recovery of part of the energy wasted as heat, is emerging as an important component of renewable energy and energy efficiency portfolios. Although inorganic semiconductors have traditionally been employed in thermoelectric applications, organic semiconductors garner increasing attention as versatile thermoelectric materials. Here we present a combined theoretical and experimental study suggesting that semiconducting single-walled carbon nanotubes with carefully controlled chirality distribution and carrier density are capable of large thermoelectric power factors, higher than 340 mu Wm(-1) K-2, comparable to the best-performing conducting polymers and larger than previously observed for carbon nanotube films. Furthermore, we demonstrate that phonons are the dominant source of thermal conductivity in the networks, and that our carrier doping process significantly reduces the thermal conductivity relative to undoped networks. These findings provide the scientific underpinning for improved functional organic thermoelectric composites with carbon nanotube inclusions.
引用
收藏
页数:9
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