Abstract
As commercial interest in flexible power-conversion devices increases, the demand for high-performance alternatives to brittle inorganic thermoelectric (TE) materials is growing. As an alternative, we propose a rationally designed graphene/polymer/inorganic nanocrystal free-standing paper with high TE performance, high flexibility, and mechanical/chemical durability. The ternary hybrid system of the graphene/polymer/inorganic nanocrystal includes two heterojunctions that induce double-carrier filtering, which significantly increases the electrical conductivity without a major decrease in the thermopower. The ternary hybrid shows a power factor of 143 μW m-1 K-1 at 300 K, which is one to two orders of magnitude higher than those of single- or binary-component materials. In addition, with five hybrid papers and polyethyleneimine (PEI)-doped single-walled carbon nanotubes (SWCNTs) as the p-type and n-type TE units, respectively, a maximum power density of 650 nW cm-2 at a temperature difference of 50 K can be obtained. The strategy proposed here can improve the performance of flexible TE materials by introducing more heterojunctions and optimizing carrier transfer at those junctions, and shows great potential for the preparation of flexible or wearable power-conversion devices.
| Original language | English |
|---|---|
| Article number | 1502181 |
| Journal | Advanced Energy Materials |
| Volume | 6 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2016 May 11 |
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Keywords
- composite materials
- flexible electronics
- heterojunctions
- nanocomposites
- thermoelectric properties
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
Cite this
High-Performance Thermoelectric Paper Based on Double Carrier-Filtering Processes at Nanowire Heterojunctions. / Choi, Jaeyoo; Lee, Jang Yeol; Lee, Sang-Soo; Park, Chong Rae; Kim, Heesuk.
In: Advanced Energy Materials, Vol. 6, No. 9, 1502181, 11.05.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - High-Performance Thermoelectric Paper Based on Double Carrier-Filtering Processes at Nanowire Heterojunctions
AU - Choi, Jaeyoo
AU - Lee, Jang Yeol
AU - Lee, Sang-Soo
AU - Park, Chong Rae
AU - Kim, Heesuk
PY - 2016/5/11
Y1 - 2016/5/11
N2 - As commercial interest in flexible power-conversion devices increases, the demand for high-performance alternatives to brittle inorganic thermoelectric (TE) materials is growing. As an alternative, we propose a rationally designed graphene/polymer/inorganic nanocrystal free-standing paper with high TE performance, high flexibility, and mechanical/chemical durability. The ternary hybrid system of the graphene/polymer/inorganic nanocrystal includes two heterojunctions that induce double-carrier filtering, which significantly increases the electrical conductivity without a major decrease in the thermopower. The ternary hybrid shows a power factor of 143 μW m-1 K-1 at 300 K, which is one to two orders of magnitude higher than those of single- or binary-component materials. In addition, with five hybrid papers and polyethyleneimine (PEI)-doped single-walled carbon nanotubes (SWCNTs) as the p-type and n-type TE units, respectively, a maximum power density of 650 nW cm-2 at a temperature difference of 50 K can be obtained. The strategy proposed here can improve the performance of flexible TE materials by introducing more heterojunctions and optimizing carrier transfer at those junctions, and shows great potential for the preparation of flexible or wearable power-conversion devices.
AB - As commercial interest in flexible power-conversion devices increases, the demand for high-performance alternatives to brittle inorganic thermoelectric (TE) materials is growing. As an alternative, we propose a rationally designed graphene/polymer/inorganic nanocrystal free-standing paper with high TE performance, high flexibility, and mechanical/chemical durability. The ternary hybrid system of the graphene/polymer/inorganic nanocrystal includes two heterojunctions that induce double-carrier filtering, which significantly increases the electrical conductivity without a major decrease in the thermopower. The ternary hybrid shows a power factor of 143 μW m-1 K-1 at 300 K, which is one to two orders of magnitude higher than those of single- or binary-component materials. In addition, with five hybrid papers and polyethyleneimine (PEI)-doped single-walled carbon nanotubes (SWCNTs) as the p-type and n-type TE units, respectively, a maximum power density of 650 nW cm-2 at a temperature difference of 50 K can be obtained. The strategy proposed here can improve the performance of flexible TE materials by introducing more heterojunctions and optimizing carrier transfer at those junctions, and shows great potential for the preparation of flexible or wearable power-conversion devices.
KW - composite materials
KW - flexible electronics
KW - heterojunctions
KW - nanocomposites
KW - thermoelectric properties
UR - http://www.scopus.com/inward/record.url?scp=84969523015&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84969523015&partnerID=8YFLogxK
U2 - 10.1002/aenm.201502181
DO - 10.1002/aenm.201502181
M3 - Article
AN - SCOPUS:84969523015
VL - 6
JO - Advanced Energy Materials
JF - Advanced Energy Materials
SN - 1614-6832
IS - 9
M1 - 1502181
ER -