ISIS Neutron and Muon Source Data Journal

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

Abstract: 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.

Principal Investigator: Dr Aritra Banerjee
Experimenter: Mr Subarna Das
Experimenter: Mr PINTU SINGHA
Experimenter: Dr Sudipta Bandyopadhyay
Local Contact: Dr Tatiana Guidi
Experimenter: Professor Anthony Powell
Experimenter: Dr David Voneshen

DOI: 10.5286/ISIS.E.RB1868011

ISIS Experiment Number: RB1868011

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Aritra Banerjee et al; (2019): Evaluation of Phonon Density of State (PDOS) and its correlation with thermoelectric performance in Bi2Te3/Graphite nanocomposites, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1868011

Data is released under the CC-BY-4.0 license.