Fe-Doping Effect on Thermoelectric Properties of p-Type Bi0.48Sb1.52Te3

نویسندگان

  • Hyeona Mun
  • Kyu Hyoung Lee
  • Suk Jun Kim
  • Jong-Young Kim
  • Jeong Hoon Lee
  • Jae-Hong Lim
  • Hee Jung Park
  • Jong Wook Roh
  • Sung Wng Kim
چکیده

The substitutional doping approach has been shown to be an effective strategy to improve ZT of Bi₂Te₃-based thermoelectric raw materials. We herein report the Fe-doping effects on electronic and thermal transport properties of polycrystalline bulks of p-type Bi0.48Sb1.52Te₃. After a small amount of Fe-doping on Bi/Sb-sites, the power factor could be enhanced due to the optimization of carrier concentration. Additionally, lattice thermal conductivity was reduced by the intensified point-defect phonon scattering originating from the mass difference between the host atoms (Bi/Sb) and dopants (Fe). An enhanced ZT of 1.09 at 300 K was obtained in 1.0 at% Fe-doped Bi0.48Sb1.52Te₃ by these synergetic effects.

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عنوان ژورنال:

دوره 8  شماره 

صفحات  -

تاریخ انتشار 2015