Fe-doping effect on thermoelectric properties of p-type Bi0.48Sb1.52Te3

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

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish
Pages (from-to)959-965
Number of pages7
JournalMaterials
Volume8
Issue number3
DOIs
Publication statusPublished - 2015 Jan 1

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Doping (additives)
Phonon scattering
Point defects
Crystal lattices
Transport properties
Carrier concentration
Thermal conductivity
Raw materials
Atoms

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Mun, H., Lee, K. H., Kim, S. J., Kim, J. Y., Lee, J. H., Lim, J. H., ... Kim, S. W. (2015). Fe-doping effect on thermoelectric properties of p-type Bi0.48Sb1.52Te3. Materials, 8(3), 959-965. https://doi.org/10.3390/ma8030959
Mun, Hyeona ; Lee, Kyu Hyoung ; Kim, Suk Jun ; Kim, Jong Young ; Lee, Jeong Hoon ; Lim, Jae Hong ; Park, Hee Jung ; Roh, Jong Wook ; Kim, Sung Wng. / Fe-doping effect on thermoelectric properties of p-type Bi0.48Sb1.52Te3. In: Materials. 2015 ; Vol. 8, No. 3. pp. 959-965.
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Mun, H, Lee, KH, Kim, SJ, Kim, JY, Lee, JH, Lim, JH, Park, HJ, Roh, JW & Kim, SW 2015, 'Fe-doping effect on thermoelectric properties of p-type Bi0.48Sb1.52Te3', Materials, vol. 8, no. 3, pp. 959-965. https://doi.org/10.3390/ma8030959

Fe-doping effect on thermoelectric properties of p-type Bi0.48Sb1.52Te3. / Mun, Hyeona; Lee, Kyu Hyoung; Kim, Suk Jun; Kim, Jong Young; Lee, Jeong Hoon; Lim, Jae Hong; Park, Hee Jung; Roh, Jong Wook; Kim, Sung Wng.

In: Materials, Vol. 8, No. 3, 01.01.2015, p. 959-965.

Research output: Contribution to journalArticle

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