Thermoelectric properties of thiospinels In1-x@xIn2S4-yTey
Solid State and Surface Chemistry, Material Synthesis
Final Report Abstract
The In0.84 0.16In2S4-yTey, In0.78 0.22In2S4-yTey and In0.67 0.33In2S4-yTey (y = 0.1, 0.2, 0.3) samples were synthesized. The solubility of tellurium in such thiospinels was found to be limited to y ≤ 0.2. The complex studies of physical properties of these materials involving diverse methods revealed them to be n-type semiconductors with moderate energy band gaps as well as to be characterized by reduced electrical and thermal conductivities in comparison to the pristine binary In-S compounds. All these resulted in enhancement of the thermoelectric efficiency by a factor of approximately two. Measuring Hall effect, we have shown that such changes are mainly related to the increase of charge carrier concentration and their mobility. To analyse the phonon scattering mechanisms, which are dominant factors influencing thermal transport, the optothermal Raman technique was involved. This allowed us to distinguish between normal-, umklapp- three phonon as well as four phonon processes, which are beneficial with respect to the needed reduction of thermal conductivity. Our studies have shown that strong structural disorder and ‘rattling’ effect in indium thiospinels are additional factors contributing to the improvement their thermoelectric efficiency. To establish the optothermal Raman technique as powerful tool in the clarification of the involvement phonon processes in thermal transport, we tested it on synthetically grown (FeS2, In2Te3, BiFeO3) and on natural (FeS2, PbS, PbCuSbS4) crystals. Performing again complex studies involving thermal and electrical transport, specific heat capacity, thermal expansion measurements combined with quantum mechanical theoretical simulations we provided new insights in the understanding of charge carriers and phonon scattering mechanisms in these, at the first glance, well established materials. The obtained results, developed approaches and methodologies coming from the activities within this project are opening some new horizons in the solid state physics and chemistry as well as in the general material science.
Publications
-
Improving thermoelectric performance of indium thiospinel by Se- and Te-substitution. Journal of Materials Chemistry C, 9(11), 4008-4019.
Wyżga, Paweł; Grimm, Sven; Garbe, Valentin; Zuñiga-Puelles, Esteban; Himcinschi, Cameliu; Veremchuk, Igor; Leithe-Jasper, Andreas & Gumeniuk, Roman
-
Low thermal conductivity in bournonite PbCuSbS3: A comprehensive study. Phys. Rev. B.
E. Zuñiga-Puelles, R. Cardoso-Gil, A. Özden, N. Bulut, V. Svitlyk, C. Himcinschi, J. Kortus & R. Gumeniuk
-
Thermal conductivity and phonon anharmonicity of chemical vapor transport grown and mineral–FeS2 single crystals: An optothermal Raman study. Journal of Raman Spectroscopy, 54(1), 84-92.
Özden, Ayberk; Zuñiga‐Puelles, Esteban; Kortus, Jens; Gumeniuk, Roman & Himcinschi, Cameliu
-
Electrical and thermal transport in Bournonite PbCuSbS3 German-Korean Thermoelectric workshop 09.2023
E. Zuñiga-Puelles, R. Cardoso-Gil, A. Özden, N. Bulut, V. Svitlyk, C. Himcinschi, J. Kortus & R. Gumeniuk
-
Thermal Conductivity of CVT Grown FeS2 Crystals Measured by Optothermal Raman Method DPG- Frühjahrstagung Dresden 03.2023
A. Özden, E. Zuñiga Puelles, J. Kortus, R. Gumeniuk & C. Himcinschi
-
Thermal conductivity of thin films and bulk BiFeO3 determined by opto-thermal Raman spectroscopy method EMRS Spring Meeting Strasbourg 06.2023
C. Himcinschi, A. Özden, F. Drechsler, J.L. Proschwitz, J. Kortus, I. Lindfors-Vrejoiu & M. Alexe
-
Thermoelectric properties and scattering mechanisms in natural PbS. Physical Review B, 107(19).
Zuñiga-Puelles, Esteban; Levytskyi, Volodymyr; Özden, Ayberk; Gürel, Tanju; Bulut, Nebahat; Himcinschi, Cameliu; Sevik, Cem; Kortus, Jens & Gumeniuk, Roman
-
Optothermal analysis of Indium thiospinels DPG- Frühjahrstagung Berlin 03 2024
A. Straßheim, C. Himcinschi, A. Özden, E. Zuñiga-Puelles, R. Gumeniuk & J. Kortus
-
Probing the local thermal conductivity of single- and multidomain ferroelastic variants of BiFeO₃ by Raman thermometry. Physical Review Materials, 8(1).
Özden, Ayberk; Drechsler, Felix; Kortus, Jens; Alexe, Marin & Himcinschi, Cameliu
-
Thermoelectric performance of indium-rich thiospinels In1−y□yIn₂S4−xTex (y ≈ 0.16, 0.22 and x ≈ 0.1, 0.2). Journal of Alloys and Compounds, 976, 173055.
Zuñiga-Puelles, Esteban; Özden, Ayberk; Pacheco, Vicente; Akselrud, Lev; Cardoso-Gil, Raul; Straßheim, André; Wyżga, Paweł; Himcinschi, Cameliu & Gumeniuk, Roman
