On the optical properties of thermoelectric alkali metal chalcogenide compounds

E. Hatzikraniotis, Th Kyratsi, T. Zorba, K. M. Paraskevopoulos, Mercouri G Kanatzidis

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

1 Citation (Scopus)

Abstract

Solid solutions of K2Bi8-xSbxSe 13 is an interesting series of complex bismuth-chalcogenide compounds, which are attractive for thermoelectric investigations. The highly anisotropic structure in these compounds results in needle-like morphology along the b- crystallographic axis, leaving structural tunnels where K+ ions reside. The complex electronic structure that arises from a large and low symmetry unit cell and the weakly bound K+ ions, lead to high Seebeck coefficient, highly anisotropic electrical properties and very low thermal conductivity. Reflectivity spectra in the FIR region are presented for several members in the Sb-rich (x≥6) side. Optical investigations are carried out on crystalline and pelletized samples. The received spectra are analyzed, examined comparatively and discussed. Results indicate that upon Bi/Sb substitution in the Sb-rich region, phonons develop a mixed-mode behavior in the FIR spectral region.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
Pages269-274
Number of pages6
Volume886
Publication statusPublished - 2006
Event2005 Materials Research Society Fall Meeting - Boston, MA, United States
Duration: Nov 28 2005Dec 1 2005

Other

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

Fingerprint

Alkali metal compounds
Bismuth compounds
Optical properties
Ions
Seebeck coefficient
Phonons
Needles
Electronic structure
Solid solutions
Thermal conductivity
Tunnels
Electric properties
Substitution reactions
Crystalline materials

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Hatzikraniotis, E., Kyratsi, T., Zorba, T., Paraskevopoulos, K. M., & Kanatzidis, M. G. (2006). On the optical properties of thermoelectric alkali metal chalcogenide compounds. In Materials Research Society Symposium Proceedings (Vol. 886, pp. 269-274)

On the optical properties of thermoelectric alkali metal chalcogenide compounds. / Hatzikraniotis, E.; Kyratsi, Th; Zorba, T.; Paraskevopoulos, K. M.; Kanatzidis, Mercouri G.

Materials Research Society Symposium Proceedings. Vol. 886 2006. p. 269-274.

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

Hatzikraniotis, E, Kyratsi, T, Zorba, T, Paraskevopoulos, KM & Kanatzidis, MG 2006, On the optical properties of thermoelectric alkali metal chalcogenide compounds. in Materials Research Society Symposium Proceedings. vol. 886, pp. 269-274, 2005 Materials Research Society Fall Meeting, Boston, MA, United States, 11/28/05.
Hatzikraniotis E, Kyratsi T, Zorba T, Paraskevopoulos KM, Kanatzidis MG. On the optical properties of thermoelectric alkali metal chalcogenide compounds. In Materials Research Society Symposium Proceedings. Vol. 886. 2006. p. 269-274
Hatzikraniotis, E. ; Kyratsi, Th ; Zorba, T. ; Paraskevopoulos, K. M. ; Kanatzidis, Mercouri G. / On the optical properties of thermoelectric alkali metal chalcogenide compounds. Materials Research Society Symposium Proceedings. Vol. 886 2006. pp. 269-274
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