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

다국어 초록 (Multilingual Abstract)

We provided a Bi2Te3-polypyrrole hybrid material, in which energy band junction and phonon scatteringeffects should appear at the interface of the two components. The hybrid material exhibited increases inelectrical resistivity and the Seebeck coefficient due the energy band junction, thus retaining the powerfactor without loss, whereas showing a great reduction in thermal conductivity because of the phononscattering at the interface. This significant decoupling of electrical and thermal properties resulted inpredominantfigures of merit (ZTmax1.21 at 100 C and ZTave1.18 at 50–150 C) among n-type Bi2Te3or Bi2(Te,Se)3 materials previously reported.

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