Substitutions in the homologous family CsPbmBi 3Te5+m and preliminary thermoelectric results

Aurélie Guéguen, Eric Quarez, Mercouri G. Kanatzidis

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

Abstract

We report analogs of the homologous family CsPbmBi 3Te5+m, namely Cs0.74K0.76Bi 3.5Te6 (1), CsNa0.98Bi4.01Te 7 (2), Cs0.69Ca0.65Bi0.34Te 6 (3), Rb0.82Pb0.82Bi3.18Te 6 (4), Rb0.19K1.31Bi3.50Te 6 (5), RbSnBi3Te6 (6), Rb0.94Ca 0.94Bi3.06Te6 (7) and RbYbBi3Te 6 (8). They all crystallize in the orthorhombic space group Cmcm and are isostructural to CsPbBi3Te6 the first member of the family except for CsNa0.98Bi4.01Te7 which is isostructural to CsPb2Bi3Te7, the second member of the family. The R1 factor was 0.0455 for (1), 0.0491 for (2), 0.0367 for (3), 0.0287 for (4), 0.0458 for (5), 0.0498 or (6), 0.0560 for (7) and 0.0356 for (8). Preliminary thermoelectric measurements on Cs 0.76K0.74Bi3.5Te6 show electrical conductivity values in the range of 600-1000 S/cm. The thermopower shows n-type charge transport with room temperature values of ∼ -35 μV/K. By comparison, the electrical conductivity at room temperature of Rb 0.82Pb0.82Bi3.18Te6 was ∼1400 S/cm, while the thermopower was ∼ -20 μV/K.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
Pages299-304
Number of pages6
Publication statusPublished - May 8 2006
Event2005 Materials Research Society Fall Meeting - Boston, MA, United States
Duration: Nov 28 2005Dec 1 2005

Publication series

NameMaterials Research Society Symposium Proceedings
Volume886
ISSN (Print)0272-9172

Other

Other2005 Materials Research Society Fall Meeting
CountryUnited States
CityBoston, MA
Period11/28/0512/1/05

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ASJC Scopus subject areas

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

Cite this

Guéguen, A., Quarez, E., & Kanatzidis, M. G. (2006). Substitutions in the homologous family CsPbmBi 3Te5+m and preliminary thermoelectric results. In Materials Research Society Symposium Proceedings (pp. 299-304). (Materials Research Society Symposium Proceedings; Vol. 886).