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Decoupling effect of electrical and thermal properties of Bi2Te3-polypyrrole hybrid material causing remarkable enhancement in thermoelectric performance

Title
Decoupling effect of electrical and thermal properties of Bi2Te3-polypyrrole hybrid material causing remarkable enhancement in thermoelectric performance
Authors
Kim, ChamBaek, Ju YoungLopez, David HumbertoKim, Dong HwanKim, Hoyoung
DGIST Authors
Kim, ChamKim, Dong HwanKim, Hoyoung
Issue Date
2019-03
Citation
Journal of Industrial and Engineering Chemistry, 71, 119-126
Type
Article
Article Type
Article
Author Keywords
ThermoelectricHybrid materialBi2Te3Energy band junctionPhonon scattering
Keywords
BISMUTH-TELLURIDENANOSTRUCTURED BI2TE3CHEMICAL-SYNTHESISPOLYPYRROLEPOLYMERIZATIONFILMSNANOCOMPOSITESCONDUCTIVITYMORPHOLOGYPOLYMERS
ISSN
1226-086X
Abstract
We provided a Bi2Te3-polypyrrole hybrid material, in which energy band junction and phonon scattering effects should appear at the interface of the two components. The hybrid material exhibited increases in electrical resistivity and the Seebeck coefficient due the energy band junction, thus retaining the power factor without loss, whereas showing a great reduction in thermal conductivity because of the phonon scattering at the interface. This significant decoupling of electrical and thermal properties resulted in predominant figures of merit (ZTmax ∼ 1.21 at 100 °C and ZTave ∼ 1.18 at 50–150 °C) among n-type Bi2Te3 or Bi2(Te,Se)3 materials previously reported. © 2018 The Korean Society of Industrial and Engineering Chemistry
URI
http://hdl.handle.net/20.500.11750/9496
DOI
10.1016/j.jiec.2018.11.013
Publisher
Korean Society of Industrial and Engineering Chemistry
Related Researcher
Files:
There are no files associated with this item.
Collection:
Division of Nanotechnology1. Journal Articles


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