Two-Dimensional Tellurene as Excellent Thermoelectric Material

Sitansh Sharma, Nirpendra Singh, Udo Schwingenschlögl

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

We study the thermoelectric properties of two-dimensional tellurene by first-principles calculations and semiclassical Boltzmann transport theory. The HSE06 hybrid functional results in a moderate direct band gap of 1.48 eV at the Γ point. A high room temperature Seebeck coefficient (Sxx = 0.38 mV/K, Syy = 0.36 mV/K) is combined with anisotropic lattice thermal conductivity (κxxl = 0.43 W/m K, κyyl = 1.29 W/m K). Phonon band structures demonstrate a key role of optical phonons in the record low thermal conductivity that leads to excellent thermoelectric performance of tellurene. At room temperature and moderate hole doping of 1.2 × 10–11 cm–2, for example, a figure of merit of ZTxx = 0.8 is achieved.
Original languageEnglish (US)
Pages (from-to)1950-1954
Number of pages5
JournalACS Applied Energy Materials
Volume1
Issue number5
DOIs
StatePublished - Apr 20 2018

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). For computer time, this research used the resources of the Supercomputing Laboratory at KAUST.

Fingerprint Dive into the research topics of 'Two-Dimensional Tellurene as Excellent Thermoelectric Material'. Together they form a unique fingerprint.

Cite this