Power factor enhancement via simultaneous improvement of electrical conductivity and Seebeck coefficient in tellurium nanowires/reduced graphene oxide flexible thermoelectric films

Jie Gao, Chengyan Liu, Lei Miao, Xiaoyang Wang, Chao Li, Rong Huang, Yu Chen, Sakae Tanemura

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The simultaneous improvement of electrical conductivity (σ) and Seebeck coefficient (S) is essential to realize the thermoelectric materials with high power factor value. Here, we report the discovery that the redox reaction happened between the reduced graphene oxide (RGO) sheets and tellurium (Te) nanowires can lead to a simultaneous improvement of σ and S in the RGO/Te nanowires hybrid films. With optimization, the electrical conductivity and Seebeck coefficient can reach 633 S/m and 382 μV/K, respectively, pushing the power factor value up to 68.4 μW/(mK2), approximately 25 times larger than the reported pure Te nanowires film. Based on all of the characterizations, the redox reaction between the RGO sheets and Te nanowires have been confirmed and the transportation characteristics of the hybrid films are predicted. We demonstrate the new approach that via turning the redox reaction, the interfacial interaction can be optimized, enabling a novel flexible thermoelectric films with superior performance. To our knowledge, this is the first time that the TE properties of RGO/inorganic hybrid films are reported.

Original languageEnglish
Pages (from-to)342-351
Number of pages10
JournalSynthetic Metals
Volume210
DOIs
Publication statusPublished - 2015 Dec 1
Externally publishedYes

Keywords

  • Hybrid films
  • Reduced graphene oxide
  • Thermoelectric

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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