High thermoelectric efficiency in co-doped degenerate p-type PbTe

John Androulakis, Ilyia Todorov, Duck Young Chung, Sedat Ballikaya, Guoyu Wang, Ctirad Uher, Mercouri G Kanatzidis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We explored the effect of K and K-Na substitution for Pb atoms in the lattice of PbTe, in an effort to test a hypothesis for the development of a resonant state that may enhance the thermoelectric power. At 300K the data can adequately be explained by a combination of a single and two-band model for the valence band of PbTe depending on hole density that varies in the range 1-15 × 1019 cm-3. A change in scattering mechanism was observed in the temperature dependence of the electrical conductivity, σ, for samples concurrently doped with K and Na which results in significantly enhanced σ at elevated temperatures and hence power factors. Thermal conductivity data provide evidence of a strong interaction between the light- and the heavy-hole valence bands at least up to 500K. Figure of merits as high as 1.3 at 700K were measured as a result of the enhanced power factors.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
Pages75-80
Number of pages6
Volume1267
Publication statusPublished - 2010
Event2010 MRS Spring Meeting - San Francisco, CA, United States
Duration: Apr 5 2010Apr 9 2010

Other

Other2010 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period4/5/104/9/10

Fingerprint

Valence bands
Thermoelectric power
valence
Thermal conductivity
Substitution reactions
Scattering
figure of merit
Atoms
Temperature
thermal conductivity
substitutes
temperature dependence
electrical resistivity
scattering
atoms
temperature
Electric Conductivity

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Androulakis, J., Todorov, I., Chung, D. Y., Ballikaya, S., Wang, G., Uher, C., & Kanatzidis, M. G. (2010). High thermoelectric efficiency in co-doped degenerate p-type PbTe. In Materials Research Society Symposium Proceedings (Vol. 1267, pp. 75-80)

High thermoelectric efficiency in co-doped degenerate p-type PbTe. / Androulakis, John; Todorov, Ilyia; Chung, Duck Young; Ballikaya, Sedat; Wang, Guoyu; Uher, Ctirad; Kanatzidis, Mercouri G.

Materials Research Society Symposium Proceedings. Vol. 1267 2010. p. 75-80.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Androulakis, J, Todorov, I, Chung, DY, Ballikaya, S, Wang, G, Uher, C & Kanatzidis, MG 2010, High thermoelectric efficiency in co-doped degenerate p-type PbTe. in Materials Research Society Symposium Proceedings. vol. 1267, pp. 75-80, 2010 MRS Spring Meeting, San Francisco, CA, United States, 4/5/10.
Androulakis J, Todorov I, Chung DY, Ballikaya S, Wang G, Uher C et al. High thermoelectric efficiency in co-doped degenerate p-type PbTe. In Materials Research Society Symposium Proceedings. Vol. 1267. 2010. p. 75-80
Androulakis, John ; Todorov, Ilyia ; Chung, Duck Young ; Ballikaya, Sedat ; Wang, Guoyu ; Uher, Ctirad ; Kanatzidis, Mercouri G. / High thermoelectric efficiency in co-doped degenerate p-type PbTe. Materials Research Society Symposium Proceedings. Vol. 1267 2010. pp. 75-80
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