Influence of Pd doping on electrical and thermal properties of n-Type Cu0.008Bi2Te2.7Se0.3 alloys

Se Yun Kim, Hyun Sik Kim, Kyu Hyoung Lee, Hyun jun Cho, Sung sil Choo, Seok won Hong, Yeseong Oh, Yerim Yang, Kimoon Lee, Jae Hong Lim, Soon Mok Choi, Hee Jung Park, Weon Ho Shin, Sang il Kim

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Doping is known as an effective way to modify both electrical and thermal transport properties of thermoelectric alloys to enhance their energy conversion efficiency. In this project, we report the effect of Pd doping on the electrical and thermal properties of n-type Cu0.008Bi2Te2.7Se0.3 alloys. Pd doping was found to increase the electrical conductivity along with the electron carrier concentration. As a result, the effective mass and power factors also increased upon the Pd doping. While the bipolar thermal conductivity was reduced with the Pd doping due to the increased carrier concentration, the contribution of Pd to point defect phonon scattering on the lattice thermal conductivity was found to be very small. Consequently, Pd doping resulted in an enhanced thermoelectric figure of merit, zT, at a high temperature, due to the enhanced power factor and the reduced bipolar thermal conductivity.

Original languageEnglish
Article number4080
Issue number24
StatePublished - 1 Dec 2019


  • Bipolar thermal conductivity
  • Effective mass
  • Pd doping
  • Phonon scattering
  • Thermoelectric


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