Doping effects on the thermoelectric properties of Cu-intercalated Bi2Te2.7Se0.3

Kyu Hyoung Lee, Soon Mok Choi, Sang Il Kim, Jong Wook Roh, Dae Jin Yang, Weon Ho Shin, Hee Jung Park, Kimoon Lee, Sungwoo Hwang, Jeong Hoon Lee, Hyeona Mun, Sung Wng Kim

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Abstract

We herein report an enhancement of the thermoelectric performance of spark plasma sintered polycrystalline n-type Bi2Te2.7Se0.3 by the intercalation of Cu and the doping of Al on Bi-sites. Through the intercalation of a small amount of Cu (0.008), the reproducibility could be significantly improved, with ZT was enhanced from 0.64 to 0.73 at 300 K due to the reduced lattice thermal conductivity benefiting from intensified point-defect phonon scattering. We also found that Al is an effective doping element for power factor enhancement and for reducing the lattice thermal conductivity of Cu-intercalated Bi2Te2.7Se0.3. With these synergetic effects, an enhanced ZT values of 0.78 at 300 K and 0.81 at 360 K were obtained in 1 at% Al-doped Cu0.008Bi2Te2.7Se0.3 (Cu0.008Bi1.98Al0.02Te2.7Se0.3).

Original languageEnglish
Pages (from-to)190-193
Number of pages4
JournalCurrent Applied Physics
Volume15
Issue number3
DOIs
Publication statusPublished - 2015 Jan 1

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Intercalation
intercalation
Thermal conductivity
thermal conductivity
Doping (additives)
Phonon scattering
augmentation
Point defects
sparks
Electric sparks
Crystal lattices
Chemical elements
point defects
Plasmas
scattering

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Lee, K. H., Choi, S. M., Kim, S. I., Roh, J. W., Yang, D. J., Shin, W. H., ... Kim, S. W. (2015). Doping effects on the thermoelectric properties of Cu-intercalated Bi2Te2.7Se0.3. Current Applied Physics, 15(3), 190-193. https://doi.org/10.1016/j.cap.2014.12.006
Lee, Kyu Hyoung ; Choi, Soon Mok ; Kim, Sang Il ; Roh, Jong Wook ; Yang, Dae Jin ; Shin, Weon Ho ; Park, Hee Jung ; Lee, Kimoon ; Hwang, Sungwoo ; Lee, Jeong Hoon ; Mun, Hyeona ; Kim, Sung Wng. / Doping effects on the thermoelectric properties of Cu-intercalated Bi2Te2.7Se0.3. In: Current Applied Physics. 2015 ; Vol. 15, No. 3. pp. 190-193.
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abstract = "We herein report an enhancement of the thermoelectric performance of spark plasma sintered polycrystalline n-type Bi2Te2.7Se0.3 by the intercalation of Cu and the doping of Al on Bi-sites. Through the intercalation of a small amount of Cu (0.008), the reproducibility could be significantly improved, with ZT was enhanced from 0.64 to 0.73 at 300 K due to the reduced lattice thermal conductivity benefiting from intensified point-defect phonon scattering. We also found that Al is an effective doping element for power factor enhancement and for reducing the lattice thermal conductivity of Cu-intercalated Bi2Te2.7Se0.3. With these synergetic effects, an enhanced ZT values of 0.78 at 300 K and 0.81 at 360 K were obtained in 1 at{\%} Al-doped Cu0.008Bi2Te2.7Se0.3 (Cu0.008Bi1.98Al0.02Te2.7Se0.3).",
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Lee, KH, Choi, SM, Kim, SI, Roh, JW, Yang, DJ, Shin, WH, Park, HJ, Lee, K, Hwang, S, Lee, JH, Mun, H & Kim, SW 2015, 'Doping effects on the thermoelectric properties of Cu-intercalated Bi2Te2.7Se0.3', Current Applied Physics, vol. 15, no. 3, pp. 190-193. https://doi.org/10.1016/j.cap.2014.12.006

Doping effects on the thermoelectric properties of Cu-intercalated Bi2Te2.7Se0.3. / Lee, Kyu Hyoung; Choi, Soon Mok; Kim, Sang Il; Roh, Jong Wook; Yang, Dae Jin; Shin, Weon Ho; Park, Hee Jung; Lee, Kimoon; Hwang, Sungwoo; Lee, Jeong Hoon; Mun, Hyeona; Kim, Sung Wng.

In: Current Applied Physics, Vol. 15, No. 3, 01.01.2015, p. 190-193.

Research output: Contribution to journalArticle

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T1 - Doping effects on the thermoelectric properties of Cu-intercalated Bi2Te2.7Se0.3

AU - Lee, Kyu Hyoung

AU - Choi, Soon Mok

AU - Kim, Sang Il

AU - Roh, Jong Wook

AU - Yang, Dae Jin

AU - Shin, Weon Ho

AU - Park, Hee Jung

AU - Lee, Kimoon

AU - Hwang, Sungwoo

AU - Lee, Jeong Hoon

AU - Mun, Hyeona

AU - Kim, Sung Wng

PY - 2015/1/1

Y1 - 2015/1/1

N2 - We herein report an enhancement of the thermoelectric performance of spark plasma sintered polycrystalline n-type Bi2Te2.7Se0.3 by the intercalation of Cu and the doping of Al on Bi-sites. Through the intercalation of a small amount of Cu (0.008), the reproducibility could be significantly improved, with ZT was enhanced from 0.64 to 0.73 at 300 K due to the reduced lattice thermal conductivity benefiting from intensified point-defect phonon scattering. We also found that Al is an effective doping element for power factor enhancement and for reducing the lattice thermal conductivity of Cu-intercalated Bi2Te2.7Se0.3. With these synergetic effects, an enhanced ZT values of 0.78 at 300 K and 0.81 at 360 K were obtained in 1 at% Al-doped Cu0.008Bi2Te2.7Se0.3 (Cu0.008Bi1.98Al0.02Te2.7Se0.3).

AB - We herein report an enhancement of the thermoelectric performance of spark plasma sintered polycrystalline n-type Bi2Te2.7Se0.3 by the intercalation of Cu and the doping of Al on Bi-sites. Through the intercalation of a small amount of Cu (0.008), the reproducibility could be significantly improved, with ZT was enhanced from 0.64 to 0.73 at 300 K due to the reduced lattice thermal conductivity benefiting from intensified point-defect phonon scattering. We also found that Al is an effective doping element for power factor enhancement and for reducing the lattice thermal conductivity of Cu-intercalated Bi2Te2.7Se0.3. With these synergetic effects, an enhanced ZT values of 0.78 at 300 K and 0.81 at 360 K were obtained in 1 at% Al-doped Cu0.008Bi2Te2.7Se0.3 (Cu0.008Bi1.98Al0.02Te2.7Se0.3).

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