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
- Author(s)
- Kim, Cham ; Baek, Ju Young ; Lopez, David Humberto ; Kim, Dong Hwan ; Kim, Hoyoung
- DGIST Authors
- Kim, Cham ; Kim, Dong Hwan ; Kim, Hoyoung
- Issued Date
- 2019-03
- Type
- Article
- Article Type
- Article
- Author Keywords
- Thermoelectric ; Hybrid material ; Bi2Te3 ; Energy band junction ; Phonon scattering
- Keywords
- BISMUTH-TELLURIDE ; NANOSTRUCTURED BI2TE3 ; CHEMICAL-SYNTHESIS ; POLYPYRROLE ; POLYMERIZATION ; FILMS ; NANOCOMPOSITES ; CONDUCTIVITY ; MORPHOLOGY ; POLYMERS
- 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
- Publisher
- Korean Society of Industrial and Engineering Chemistry
- Related Researcher
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Kim, Cham 나노기술연구부
- Research Interests
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- Appears in Collections:
- Division of Nanotechnology 1. Journal Articles
- Magnet-Controlled Materials Research Group 1. Journal Articles
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