| Title: |
Phonon-glass electron-crystal behaviour by A site disorder in n-type thermoelectric oxides |
| Authors: |
Daniels, LM; Savvin, SN; Pitcher, MJ; Dyer, MS; Claridge, JB; Ling, S; Slater, B; Cora, F; Alaria, J; Rosseinsky, MJ |
| Source: |
Energy & Environmental Science , 10 (9) pp. 1917-1922. (2017) |
| Publisher Information: |
ROYAL SOC CHEMISTRY |
| Publication Year: |
2017 |
| Collection: |
University College London: UCL Discovery |
| Description: |
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. |
| Document Type: |
article in journal/newspaper |
| File Description: |
text |
| Language: |
English |
| Relation: |
https://discovery.ucl.ac.uk/id/eprint/1574123/1/Cora_Energy_Environ_Sci.pdf; https://discovery.ucl.ac.uk/id/eprint/1574123/8/Cora_Energy_Environ_Sci_SI.pdf; https://discovery.ucl.ac.uk/id/eprint/1574123/ |
| Availability: |
https://discovery.ucl.ac.uk/id/eprint/1574123/1/Cora_Energy_Environ_Sci.pdf; https://discovery.ucl.ac.uk/id/eprint/1574123/8/Cora_Energy_Environ_Sci_SI.pdf; https://discovery.ucl.ac.uk/id/eprint/1574123/ |
| Rights: |
open |
| Accession Number: |
edsbas.CB565695 |
| Database: |
BASE |