Cesium-containing semiconductor copper sulfides have been synthesized. Temperature dependences of electron conductivity, electron Seebeck coefficient, thermal conductivity and e.m.f. of the Cu/CuBr/Sample/C electrochemical cell in the range of 300–700 K have been obtained. An increase in the electrical conductivity of the alloys with increasing cesium content has been detected. The found activation energies of conductivity in the range from 300 to 370 K are 0.076 eV, 0.064 eV and 0.036 eV for the compositions Cs0.04Cu1.96S, Cs0.075Cu1.925S and Cs0.125Cu1.875S, respectively. A sharp drop in conductivity is observed when heated above 600 K, which is associated with the transition of the main phase of the alloy to a cubic modification based on copper sulfide. For the Cs0.125Cu1.875S composition, a high dimensionless thermoelectric figure of merit ZT=0.76 at 684 K was obtained.
doi 10.33184/bulletin-bsu-2026.2.8
Биографии авторов
Balapanov Malik Khamitovich, Ufa University of Science and Technology
Doctor of Physical and Mathematical Sciences, Professor, Acting Head of the General Physics Department.ORCID: 0000-0001-7885-9462. Web of Science Researcher ID: Е-9911-2014. Scopus Author ID 6602322132.
Ishembetov Rais Khurmatullovich, Ufa University of Science and Technology
Candidate of Physical and Mathematical Sciences, Associate Professor of the General Physics Department
Akhmetgaliev Bulat Mukhamatkharasovich, Ufa University of Science and Technology
Assistant Professor of the General Physics Department
Tulyakaev Mazgar Ilgamovich, Ufa University of Science and Technology
Master's student of the Department of General Physics
Yakshibaev Robert Asgatovich, Ufa University of Science and Technology
Doctor of Physical and Mathematical Sciences, Professor, Scientific Director of the Physics and Technology Institute
