Thermoelectric Properties of Bi<sub>2</sub>Te<sub>2.7</sub>Se<sub>0.3</sub> Solid Solution with Various Grain Sizes

Tagiyev M. M., Dzhafarova S., Ahmedova A., Abdinova G. D.

RUSSIAN PHYSICS JOURNAL, vol.62, no.3, pp.505-511, 2019 (SCI-Expanded) identifier identifier

  • Nəşrin Növü: Article / Article
  • Cild: 62 Say: 3
  • Nəşr tarixi: 2019
  • Doi nömrəsi: 10.1007/s11182-019-01738-4
  • jurnalın adı: RUSSIAN PHYSICS JOURNAL
  • Jurnalın baxıldığı indekslər: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Səhifə sayı: pp.505-511
  • Adres: Bəli

Qısa məlumat

The electrical conductivity (sigma) and the coefficients of thermal e.m.f. (alpha), Holl (R-H), and thermal conductivity (chi) of extruded n-Bi2Te2.7Se0.3 samples with various grain sizes are studied in the temperature range 77-300 K after extrusion and upon subsequent annealing. It is shown that annealing substantially increases sigma and chi and has a little effect on alpha at 77 K. This indicates that at 77 K, the structural imperfections of grains play the main role in the electron and phonon scattering. There is a correlation between the degree of texture and thermoelectric properties.