Thermoelectric properties of layered perovskite-type Nb-doped SrO(SrTiO3)n (n = 1, 2) Ruddlesden-Popper phases

K. H. Lee; H. Ohta; K. Koumoto

doi:10.1109/ICT.2006.331285

Thermoelectric properties of layered perovskite-type Nb-doped SrO(SrTiO₃)_n (n = 1, 2) Ruddlesden-Popper phases

K. H. Lee, H. Ohta, K. Koumoto

Department of Materials Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Citations (Scopus)

Abstract

Thermoelectric (TE) properties of natural superlattice Ruddlesden-Popper (RP) phases were measured to elucidate their potential as TE materials, and the origin of the TE properties was discussed from the viewpoint of the shape of the TiO₆ octahedron. Compared with the cubic perovskite-type phase Nb-doped SrTiO₃, efficient reduction of the lattice thermal conductivity was observed by more than 50% at room temperature and 30% at 1000 K. There was a decrease in electrical conductivity owing to the randomly distributed insulating SrO layers in polycrystalline RP phases, and it was found that large TE power can be obtained in conjunction with high symmetry TiO ₆ octahedra.

Original language	English
Title of host publication	Proceedings ICT'06 - 25th International Conference on Thermoelectrics
Pages	81-84
Number of pages	4
DOIs	https://doi.org/10.1109/ICT.2006.331285
Publication status	Published - 2006
Event	ICT'06 - 25th International Conference on Thermoelectrics - Vienna, Austria Duration: 2006 Aug 6 → 2006 Aug 10

Publication series

Name	International Conference on Thermoelectrics, ICT, Proceedings

Other

Other	ICT'06 - 25th International Conference on Thermoelectrics
Country/Territory	Austria
City	Vienna
Period	06/8/6 → 06/8/10

All Science Journal Classification (ASJC) codes

Engineering(all)

Access to Document

10.1109/ICT.2006.331285

Cite this

@inproceedings{88a253e5bca4458b9b32580546762dfc,

title = "Thermoelectric properties of layered perovskite-type Nb-doped SrO(SrTiO3)n (n = 1, 2) Ruddlesden-Popper phases",

abstract = "Thermoelectric (TE) properties of natural superlattice Ruddlesden-Popper (RP) phases were measured to elucidate their potential as TE materials, and the origin of the TE properties was discussed from the viewpoint of the shape of the TiO6 octahedron. Compared with the cubic perovskite-type phase Nb-doped SrTiO3, efficient reduction of the lattice thermal conductivity was observed by more than 50% at room temperature and 30% at 1000 K. There was a decrease in electrical conductivity owing to the randomly distributed insulating SrO layers in polycrystalline RP phases, and it was found that large TE power can be obtained in conjunction with high symmetry TiO 6 octahedra.",

author = "Lee, {K. H.} and H. Ohta and K. Koumoto",

year = "2006",

doi = "10.1109/ICT.2006.331285",

language = "English",

isbn = "1424408105",

series = "International Conference on Thermoelectrics, ICT, Proceedings",

pages = "81--84",

booktitle = "Proceedings ICT'06 - 25th International Conference on Thermoelectrics",

note = "ICT'06 - 25th International Conference on Thermoelectrics ; Conference date: 06-08-2006 Through 10-08-2006",

}

Lee, KH, Ohta, H & Koumoto, K 2006, Thermoelectric properties of layered perovskite-type Nb-doped SrO(SrTiO₃)_n (n = 1, 2) Ruddlesden-Popper phases. in Proceedings ICT'06 - 25th International Conference on Thermoelectrics., 4133241, International Conference on Thermoelectrics, ICT, Proceedings, pp. 81-84, ICT'06 - 25th International Conference on Thermoelectrics, Vienna, Austria, 06/8/6. https://doi.org/10.1109/ICT.2006.331285

Thermoelectric properties of layered perovskite-type Nb-doped SrO(SrTiO₃)_n (n = 1, 2) Ruddlesden-Popper phases. / Lee, K. H.; Ohta, H.; Koumoto, K.
Proceedings ICT'06 - 25th International Conference on Thermoelectrics. 2006. p. 81-84 4133241 (International Conference on Thermoelectrics, ICT, Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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T1 - Thermoelectric properties of layered perovskite-type Nb-doped SrO(SrTiO3)n (n = 1, 2) Ruddlesden-Popper phases

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N2 - Thermoelectric (TE) properties of natural superlattice Ruddlesden-Popper (RP) phases were measured to elucidate their potential as TE materials, and the origin of the TE properties was discussed from the viewpoint of the shape of the TiO6 octahedron. Compared with the cubic perovskite-type phase Nb-doped SrTiO3, efficient reduction of the lattice thermal conductivity was observed by more than 50% at room temperature and 30% at 1000 K. There was a decrease in electrical conductivity owing to the randomly distributed insulating SrO layers in polycrystalline RP phases, and it was found that large TE power can be obtained in conjunction with high symmetry TiO 6 octahedra.

AB - Thermoelectric (TE) properties of natural superlattice Ruddlesden-Popper (RP) phases were measured to elucidate their potential as TE materials, and the origin of the TE properties was discussed from the viewpoint of the shape of the TiO6 octahedron. Compared with the cubic perovskite-type phase Nb-doped SrTiO3, efficient reduction of the lattice thermal conductivity was observed by more than 50% at room temperature and 30% at 1000 K. There was a decrease in electrical conductivity owing to the randomly distributed insulating SrO layers in polycrystalline RP phases, and it was found that large TE power can be obtained in conjunction with high symmetry TiO 6 octahedra.

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