Thermoelectric Transport Properties of Interface-Controlled p-type Bismuth Antimony Telluride Composites by Reduced Graphene Oxide

  • Ui Gyeong Hwang
  • Kyomin Kim
  • Woochul Kim
  • Weon Ho Shin
  • Won-Seon Seo
  • Young Soo LimEmail author
Original Article - Energy and Sustainability


We report the thermoelectric transport properties of interface-controlled p-type bismuth antimony telluride (BST) composites using reduced graphene oxide (rGO). The composites were prepared by the spark plasma sintering (SPS) of BST–graphene oxide (GO) hybrid powder, which could induce the in situ reduction of GO into rGO. Compared to the pristine BST, the interface-controlled BST composites exhibited degraded electrical conductivities with similar Seebeck coefficients, consequently resulting in decreased power factors. However, thanks to the suppressed lattice thermal conductivity by the rGO network at the grain boundaries, this disadvantage could be compensated in terms of ZT. Our results will be helpful for understanding thermoelectric transport properties of various graphene-hybrid thermoelectric materials.

Graphical Abstract


Thermoelectric Bi2Te3 Interface control Reduced graphene oxide 



This work was supported by the Midcareer Researcher Program (2018R1A2A2A05020902) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology, Republic of Korea.


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Copyright information

© The Korean Institute of Metals and Materials 2019

Authors and Affiliations

  • Ui Gyeong Hwang
    • 1
  • Kyomin Kim
    • 2
  • Woochul Kim
    • 2
  • Weon Ho Shin
    • 3
  • Won-Seon Seo
    • 3
  • Young Soo Lim
    • 1
    Email author
  1. 1.Department of Materials System EngineeringPukyong National UniversityBusanKorea
  2. 2.School of Mechanical EngineeringYonsei UniversitySeoulKorea
  3. 3.Energy and Environmental DivisionKorea Institute of Ceramic Engineering and TechnologyJinjuKorea

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