Daniels, LM;
Savvin, SN;
Pitcher, MJ;
Dyer, MS;
Claridge, JB;
Ling, S;
Slater, B;
... Rosseinsky, MJ; + view all
(2017)
Phonon-glass electron-crystal behaviour by A site disorder in n-type thermoelectric oxides.
Energy & Environmental Science
, 10
(9)
pp. 1917-1922.
10.1039/c7ee01510k.
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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.
| Type: | Article |
|---|---|
| Title: | Phonon-glass electron-crystal behaviour by A site disorder in n-type thermoelectric oxides |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/c7ee01510k |
| Publisher version: | http://dx.doi.org/10.1039/c7ee01510k |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1574123 |
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