Highly Integrated and Flexible Thermoelectric Module Fabricated by Brush-Cast Doping of a Highly Aligned Carbon Nanotube Web
- Authors
- An, Cheng Jin; Kang, Young Hun; Song, Hyeonjun; Jeong, Youngjin; Cho, Song Yun
- Issue Date
- Feb-2019
- Publisher
- AMER CHEMICAL SOC
- Keywords
- directly spun carbon nanotube web; doping process; brush-casting; flexible thermoelectric module; thermal sensor
- Citation
- ACS APPLIED ENERGY MATERIALS, v.2, no.2, pp.1093 - 1101
- Journal Title
- ACS APPLIED ENERGY MATERIALS
- Volume
- 2
- Number
- 2
- Start Page
- 1093
- End Page
- 1101
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/32301
- DOI
- 10.1021/acsaem.8b01673
- ISSN
- 2574-0962
- Abstract
- With increasing attention on flexible or wearable power-conversion devices, intensive research efforts have been devoted to flexible organic thermoelectric (TE) modules to replace the brittle inorganic ones. In this study, a highly integrated and flexible TE module with a novel device architecture based on a carbon nanotube (CNT) web is proposed. The pristine CNT web shows great electrical conductivity of 998.3 S cm(-1) with the highly aligned structure, owing to the increased carrier mobility in the longitudinal direction. To realize optimal TE property, the pristine CNT web is alternately doped with p- and n-type carriers using FeCl3 and benzyl viologen, respectively, via a brush-casting method. Brush-casting is the simple doping process that enables large-area and continuous fabrication of flexible TE modules by allowing precise doping of the localized area without a shadow mask. Flexible TE modules were then fabricated by repeated brushing and folding of the CNT webs. Owing to the synergic effect of the highly integrated high-performance TE material (highly aligned CNT web) and the facile doping process (brush-casting), flexible TE modules consisting of 120 p-n couples over an area of 8 cm(2) show a maximum power output of 5.3 mu W for a temperature difference of 11.7 K.
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