Abstract
This study demonstrates the fabrication and characterization of a flexible thermoelectric (TE) power generator composed of silicon nanowires (SiNWs) fabricated by top-down method and discusses its strain-dependence analysis. The Seebeck coefficients of the p- and n-type SiNWs used to form a pn-module are 156.4 and -146.1 μV K-1, respectively. The maximum power factors of the p- and n-type SiNWs are obtained as 8.79 and 8.87 mW (m K2)-1, respectively, under a convex bending of 1.11%, respectively; these are the largest values among the power factors hitherto reported for SiNWs. The dimensionless figure of merit (ZT) values of the SiNWs at room temperature are 6.8 × 10-2 and 6.7 × 10-2 for the convex bent p- and n-type SiNWs, respectively, with a strain of 1.11%. The thermoelectric properties of the pn-module and its component SiNWs are characterized under strain conditions ranging from -1.11% to 1.11%. The maximum Seebeck coefficient and power factor of the pn-module are obtained as 448 μV K-1 and 14.2 mW (m K2)-1, respectively, under convex bending of 1.11%. Moreover, the mechanical stability of the TE characteristics of the pn-module is demonstrated through a continuous bending test of 3000 cycles under convex bending of 0.66%.
| Original language | English |
|---|---|
| Journal | Advanced Energy Materials |
| DOIs | |
| Publication status | Accepted/In press - 2016 |
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Keywords
- Flexible
- Power generation
- Si nanowires
- Strain
- Thermoelectric module
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
Cite this
Flexible Thermoelectric Generators Composed of n-and p-Type Silicon Nanowires Fabricated by Top-Down Method. / Choi, Jinyong; Cho, Kyoungah; Kim, Sangsig.
In: Advanced Energy Materials, 2016.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Flexible Thermoelectric Generators Composed of n-and p-Type Silicon Nanowires Fabricated by Top-Down Method
AU - Choi, Jinyong
AU - Cho, Kyoungah
AU - Kim, Sangsig
PY - 2016
Y1 - 2016
N2 - This study demonstrates the fabrication and characterization of a flexible thermoelectric (TE) power generator composed of silicon nanowires (SiNWs) fabricated by top-down method and discusses its strain-dependence analysis. The Seebeck coefficients of the p- and n-type SiNWs used to form a pn-module are 156.4 and -146.1 μV K-1, respectively. The maximum power factors of the p- and n-type SiNWs are obtained as 8.79 and 8.87 mW (m K2)-1, respectively, under a convex bending of 1.11%, respectively; these are the largest values among the power factors hitherto reported for SiNWs. The dimensionless figure of merit (ZT) values of the SiNWs at room temperature are 6.8 × 10-2 and 6.7 × 10-2 for the convex bent p- and n-type SiNWs, respectively, with a strain of 1.11%. The thermoelectric properties of the pn-module and its component SiNWs are characterized under strain conditions ranging from -1.11% to 1.11%. The maximum Seebeck coefficient and power factor of the pn-module are obtained as 448 μV K-1 and 14.2 mW (m K2)-1, respectively, under convex bending of 1.11%. Moreover, the mechanical stability of the TE characteristics of the pn-module is demonstrated through a continuous bending test of 3000 cycles under convex bending of 0.66%.
AB - This study demonstrates the fabrication and characterization of a flexible thermoelectric (TE) power generator composed of silicon nanowires (SiNWs) fabricated by top-down method and discusses its strain-dependence analysis. The Seebeck coefficients of the p- and n-type SiNWs used to form a pn-module are 156.4 and -146.1 μV K-1, respectively. The maximum power factors of the p- and n-type SiNWs are obtained as 8.79 and 8.87 mW (m K2)-1, respectively, under a convex bending of 1.11%, respectively; these are the largest values among the power factors hitherto reported for SiNWs. The dimensionless figure of merit (ZT) values of the SiNWs at room temperature are 6.8 × 10-2 and 6.7 × 10-2 for the convex bent p- and n-type SiNWs, respectively, with a strain of 1.11%. The thermoelectric properties of the pn-module and its component SiNWs are characterized under strain conditions ranging from -1.11% to 1.11%. The maximum Seebeck coefficient and power factor of the pn-module are obtained as 448 μV K-1 and 14.2 mW (m K2)-1, respectively, under convex bending of 1.11%. Moreover, the mechanical stability of the TE characteristics of the pn-module is demonstrated through a continuous bending test of 3000 cycles under convex bending of 0.66%.
KW - Flexible
KW - Power generation
KW - Si nanowires
KW - Strain
KW - Thermoelectric module
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U2 - 10.1002/aenm.201602138
DO - 10.1002/aenm.201602138
M3 - Article
JO - Advanced Energy Materials
JF - Advanced Energy Materials
SN - 1614-6832
ER -