Low lattice thermal conductivity and promising thermoelectric figure of merit of Zintl type TlInTe2

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10389688" target="_blank" >RIV/00216208:11310/18:10389688 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1039/c8tc03492c" target="_blank" >https://doi.org/10.1039/c8tc03492c</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c8tc03492c" target="_blank" >10.1039/c8tc03492c</a>

Result language

angličtina

Original language name

Low lattice thermal conductivity and promising thermoelectric figure of merit of Zintl type TlInTe2

Original language description

Thallium compounds have appeared as a new class of advanced thermoelectric (TE) materials owing to their extremely low lattice thermal conductivity. Using a first-principles approach and Boltzmann transport theories, we investigate the electronic and phonon transport properties of a ternary thallium telluride, TlInTe2. Unlike the Bi2Te3 and PbTe used in current TE devices, a multi-valley band structure with intrinsic degeneracy is obtained for TlInTe2, which contributes to its high Seebeck coefficient and relatively high power factor. Also, because of its weak bonding stiffness and strong phonon anharmonicity, TlInTe2 has an extremely low lattice thermal conductivity of about 0.37 W m-1 K-1 at room temperature, which is almost one third of the values for Bi2Te3 and PbTe. Consequently, competitive ZT values of 1.78 and 1.84 are obtained at 300 K for p- and n-doped TlInTe2, respectively, indicating that thallium compounds are promising TE materials for practical applications.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Materials Chemistry C

ISSN

2050-7526

e-ISSN

—

Volume of the periodical

6

Issue of the periodical within the volume

48

Country of publishing house

GB - UNITED KINGDOM

Number of pages

6

Pages from-to

13269-13274

UT code for WoS article

000453251200019

EID of the result in the Scopus database

2-s2.0-85058521632