Evaluation of Phonon Density of State (PDOS) and its correlation with thermoelectric performance in Bi2Te3/Graphite nanocomposites

DOI

Nanocomposites offer a promising route for enhancing thermoelectric (TE) efficiency (ZT), which depends on interrelated material properties like Seebeck Coefficient, electrical and thermal conductivity. Our recent measurements reveal 40 fold increase in ZT at 290 K in Bi2Te3/Graphite nanocomposite as compared to pristine Bi2Te3, a potential TE material around room temperature. Manipulation of phonon transport plays a significant role in reducing thermal conduction and help to separate it from electrical transport properties. Knowledge of Phonon Density of States (PDOS) is crucial to understand the role of phonon contribution to thermal conductivity. Additional interfaces in nanocomposite lead to preferential scattering of phonons and modify PDOS. Inelastic neutron scattering experiment will reveal the role of PDOS in Bi2Te3/Graphite and help us to correlate it with observed enhanced ZT.

Identifier
DOI https://doi.org/10.5286/ISIS.E.99714235
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/99714235
Provenance
Creator Mr Subarna Das; Mr PINTU SINGHA; Dr Aritra Banerjee; Dr Sudipta Bandyopadhyay; Dr Tatiana Guidi; Professor Anthony Powell; Dr David Voneshen
Publisher ISIS Neutron and Muon Source
Publication Year 2022
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Natural Sciences; Physics
Temporal Coverage Begin 2019-02-11T08:00:00Z
Temporal Coverage End 2019-02-13T09:13:24Z