Nanostructured Thermoelectric Films Synthesised by Spark Ablation and Their Oxidation Behaviour: Nanomaterials

Hendrik Joost van Ginkel, Lisa Mitterhuber, Marijn Willem van de Putte, Mark Huijben, Sten Vollebregt, Guoqi Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

47 Downloads (Pure)

Abstract

Reducing the thermal conductivity of thermoelectric materials has been a field of intense research to improve the efficiency of thermoelectric devices. One approach is to create a nanostructured thermoelectric material that has a low thermal conductivity due to its high number of grain boundaries or voids, which scatter phonons. Here, we present a new method based on spark ablation nanoparticle generation to create nanostructured thermoelectric materials, demonstrated using Bi2Te3. The lowest achieved thermal conductivity was <0.1 W m−1 K−1 at room temperature with a mean nanoparticle size of 8±2 nm and a porosity of 44%. This is comparable to the best published nanostructured Bi2Te3 films. Oxidation is also shown to be a major issue for nanoporous materials such as the one here, illustrating the importance of immediate, air-tight packaging of such materials after synthesis and deposition.
Original languageEnglish
Article number1778
Number of pages14
JournalNanomaterials
Volume13
Issue number11
DOIs
Publication statusPublished - 2023

Keywords

  • thermoelectric
  • nanoparticle
  • Bi2Te3
  • spark ablation
  • nanostructured

Fingerprint

Dive into the research topics of 'Nanostructured Thermoelectric Films Synthesised by Spark Ablation and Their Oxidation Behaviour: Nanomaterials'. Together they form a unique fingerprint.

Cite this