Thermally Driven Large N-Type Voltage Responses from Hybrids of Carbon Nanotubes and Poly(3,4-ethylenedioxythiophene) with Tetrakis(dimethylamino)ethylene

Hong Wang; Jui-Hung Hsu; Su-In Yi; Suk Lae Kim; Kyungwho Choi; Gang Yang; Choongho Yu

doi:10.1002/adma.201502950

Thermally Driven Large N-Type Voltage Responses from Hybrids of Carbon Nanotubes and Poly(3,4-ethylenedioxythiophene) with Tetrakis(dimethylamino)ethylene

Adv Mater. 2015 Nov 18;27(43):6855-61. doi: 10.1002/adma.201502950. Epub 2015 Oct 1.

Authors

Hong Wang¹, Jui-Hung Hsu², Su-In Yi¹, Suk Lae Kim¹, Kyungwho Choi¹, Gang Yang¹, Choongho Yu^{1

2}

Affiliations

¹ Department of Mechanical Engineering, Texas A&M University, College Station, TX, 77843, USA.
² Department of Materials Science and Engineering, Texas A&M University, College Station, TX, 77843, USA.

PMID: 26427006
DOI: 10.1002/adma.201502950

Abstract

Hybrids of carbon nanotubes (CNTs) and poly(3,4-ethylenedioxythiophene) (PEDOT) treated by tetrakis(dimethylamino)ethylene (TDAE) have large n-type voltages in response to temperature differences. The reduced carrier concentration by TDAE reduction and partially percolated CNT networks embedded in the PEDOT matrix result in high thermopower and low thermal conductivity. The high electron mobility in the CNTs helps to minimally reduce the electrical conductivity of the hybrid, resulting in a large figure-of-merit.

Keywords: carbon nanotubes; poly(3,4-ethylenedioxythiophene); polymers; thermoelectric materials.