Publikationen

Simultaneous optimization of power factor and thermal conductivity via Te and Se double substitution in Cu<sub>12</sub>Sb<sub>4</sub>S<sub>13</sub> tetrahedrite

Autor(en)
Umasankar Rout, Sahil Tippireddy, Katharina Werbach, Padaikathan Pambannan, Gerda Rogl, Peter Rogl, Ramesh Chandra Mallik
Abstrakt

The present study reports the structural, electronic, elastic, and thermoelectric properties of Cu12Sb3.9Te0.1S13-xSex (x = 0, 0.1, 0.5, 0.75 and 1) tetrahedrite. The thermal conductivity was reduced due to charge carrier compensation (by Te), weakening of the Sb-S bond and local chemical disorder (induced by Se), resulting in a low mean sound velocity. Simultaneously, the power-factor was maintained high from an enhancement of the density of states near the Fermi level due to Se. Consequently, a maximum figure of merit similar to 0.84 at 673 K was achieved for the Cu12Sb3.9Te0.1S12.5Se0.5 sample due to concomitant optimisation of the power-factor and thermal conductivity.

Organisation(en)
Dynamik Kondensierter Systeme, Institut für Materialchemie
Externe Organisation(en)
Indian Institute of Science
Journal
Scripta Materialia
Band
188
Seiten
151-156
Anzahl der Seiten
6
ISSN
1359-6462
DOI
https://doi.org/10.1016/j.scriptamat.2020.07.036
Publikationsdatum
11-2020
Peer-reviewed
Ja
ÖFOS 2012
103018 Materialphysik, 104017 Physikalische Chemie
Schlagwörter
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/simultaneous-optimization-of-power-factor-and-thermal-conductivity-via-te-and-se-double-substitution-in-cu12sb4s13-tetrahedrite(43ba45fe-bd4d-4739-b38d-32fb32cc97b5).html