Issue 9, 2017

Phonon-glass electron-crystal behaviour by A site disorder in n-type thermoelectric oxides

Abstract

Phonon-glass electron-crystal (PGEC) behaviour is realised in La0.5Na0.5Ti1−xNbxO3 thermoelectric oxides. The vibrational disorder imposed by the presence of both La3+ and Na+ cations on the A site of the ABO3 perovskite oxide La0.5Na0.5TiO3 produces a phonon-glass with a thermal conductivity, κ, 80% lower than that of SrTiO3 at room temperature. Unlike other state-of-the-art thermoelectric oxides, where there is strong coupling of κ to the electronic power factor, the electronic transport of these materials can be optimised independently of the thermal transport through cation substitution at the octahedral B site. The low κ of the phonon-glass parent is retained across the La0.5Na0.5Ti1−xNbxO3 series without disrupting the electronic conductivity, affording PGEC behaviour in oxides.

Graphical abstract: Phonon-glass electron-crystal behaviour by A site disorder in n-type thermoelectric oxides

Supplementary files

Article information

Article type
Communication
Submitted
31 Maijs 2017
Accepted
02 Aug. 2017
First published
02 Aug. 2017

Energy Environ. Sci., 2017,10, 1917-1922

Phonon-glass electron-crystal behaviour by A site disorder in n-type thermoelectric oxides

L. M. Daniels, S. N. Savvin, M. J. Pitcher, M. S. Dyer, J. B. Claridge, S. Ling, B. Slater, F. Corà, J. Alaria and M. J. Rosseinsky, Energy Environ. Sci., 2017, 10, 1917 DOI: 10.1039/C7EE01510K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements