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 μm × 20 μm × 20 nm, prepared on flexible substrates by a solution process, are maximized by adjusting the NC size. A Seebeck coefficient of S = 1829 μV 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.
| Original language | English |
|---|---|
| Journal | Advanced Energy Materials |
| DOIs | |
| Publication status | Accepted/In press - 2017 |
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Keywords
- Flexible
- Nanocrystal thin films
- Power generation
- Solution-processable
- Thermoelectric modules
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
Cite this
Large Voltage Generation of Flexible Thermoelectric Nanocrystal Thin Films by Finger Contact. / Choi, Jinyong; Cho, Kyoungah; Yun, Junggwon; Park, Yoonbeom; Yang, Seunggen; Kim, Sangsig.
In: Advanced Energy Materials, 2017.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Large Voltage Generation of Flexible Thermoelectric Nanocrystal Thin Films by Finger Contact
AU - Choi, Jinyong
AU - Cho, Kyoungah
AU - Yun, Junggwon
AU - Park, Yoonbeom
AU - Yang, Seunggen
AU - Kim, Sangsig
PY - 2017
Y1 - 2017
N2 - 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 μm × 20 μm × 20 nm, prepared on flexible substrates by a solution process, are maximized by adjusting the NC size. A Seebeck coefficient of S = 1829 μV 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.
AB - 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 μm × 20 μm × 20 nm, prepared on flexible substrates by a solution process, are maximized by adjusting the NC size. A Seebeck coefficient of S = 1829 μV 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.
KW - Flexible
KW - Nanocrystal thin films
KW - Power generation
KW - Solution-processable
KW - Thermoelectric modules
UR - http://www.scopus.com/inward/record.url?scp=85024375548&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85024375548&partnerID=8YFLogxK
U2 - 10.1002/aenm.201700972
DO - 10.1002/aenm.201700972
M3 - Article
AN - SCOPUS:85024375548
JO - Advanced Energy Materials
JF - Advanced Energy Materials
SN - 1614-6832
ER -