Large Voltage Generation of Flexible Thermoelectric Nanocrystal Thin Films by Finger Contact
- Authors
- Choi, Jinyong; Cho, Kyoungah; Yun, Junggwon; Park, Yoonbeom; Yang, Seunggen; Kim, Sangsig
- Issue Date
- 8-11월-2017
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- flexible; nanocrystal thin films; power generation; solution-processable; thermoelectric modules
- Citation
- ADVANCED ENERGY MATERIALS, v.7, no.21
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED ENERGY MATERIALS
- Volume
- 7
- Number
- 21
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/81572
- DOI
- 10.1002/aenm.201700972
- ISSN
- 1614-6832
- Abstract
- This paper demonstrates that thermal energy radiated from a human finger can be converted efficiently into electricity by a nanocrystal (NC) thin film that substantially suppresses thermal conduction, but still allows electric conduction. The converting efficiencies of the chalcogenide NC thin films with dimensions 40 mu m x 20 mu m x 20 nm, prepared on flexible substrates by a solution process, are maximized by adjusting the NC size. A Seebeck coefficient of S = 1829 mu V K-1, and a dimensionless thermoelectric figure-of-merit, ZT = 0.68 are achieved at ambient temperature for p- and n-type NC thin films, respectively. A thermoelectric array consisting of p- and n-type NC thin films generates a voltage of 645 mV for a temperature gradient of 10 K. Furthermore, the donut-shaped pn array can generate a voltage of 170 mV from the heat supplied by an individual's finger.
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Collections - College of Engineering > School of Electrical Engineering > 1. Journal Articles
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