Influence of the planar orientation of the substrate on thermoelectric response of SnSe thin films

Shrikant Saini, Paolo Mele, Ashutosh Tiwari

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We report thermoelectric performance in the temperature range of 300 K–800 K of SnSe thin films on r-, a-, and c-plane sapphire substrates grown by pulsed laser deposition. Several state of the art characterization techniques such as XRD, TEM, SEM, and XPS were used to thoroughly characterize the thin films. Thermal conductivity of these films were measured at room temperature using 3ω technique. Planar orientation of the substrate was found to influence the thermoelectric performance of SnSe thin films very significantly. SnSe thin films grown on r-plane substrate showed the lowest thermal conductivity of 0.35 W/m.K at 300 K; the highest power factor and ZT values of 1.96 μW/cm.K 2 and 0.45, respectively at 800 K. These results for SnSe thin films is a ground breaking and has a potential to lead to efficient thin films thermoelectric modules.

Original languageEnglish
Pages (from-to)347-353
Number of pages7
JournalJournal of Physics and Chemistry of Solids
Volume129
DOIs
Publication statusPublished - 2019 Jun 1

Keywords

  • Figure of merit
  • SnSe thin film
  • Thermal conductivity
  • Thermoelectricity
  • Three-omega

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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