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
N1 - Funding Information:
This work was supported in part by the Mid-career Researcher Program (No. NRF-2016R1E1A1A02920171), the Brain Korea 21 Plus Project in 2017 through the National Research Foundation of Korea (NRF), and the Korea University Grant.
Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2017/11/8
Y1 - 2017/11/8
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
U2 - 10.1002/aenm.201700972
DO - 10.1002/aenm.201700972
M3 - Article
AN - SCOPUS:85024375548
VL - 7
JO - Advanced Energy Materials
JF - Advanced Energy Materials
SN - 1614-6832
IS - 21
M1 - 1700972
ER -
