Concentration Dependences of the Thermoelectric Parameters of Pb1–xAgxS and Pb1–xCuxS (0 ≤ x ≤ 0.011) Solid Solutions

Resumo

The concentration dependences of Seebeck coefficient S, resistivity ρ, thermal conductivity κ_tot, and Hall constant R_H are studied for mixed Pb_1–xAg_xS and Pb_1–xCu_xS crystals in the 0 < x ≤ 0.011 range of concentrations at T = 300 K. It is found that silver is an acceptor impurity and can induce conductivity inversion (from n-type to p-type) in Pb_{1 − x}Ag_xS samples at x ≈ 0.0045. Such inversion is not observed in the S(х), ρ(х), κtot(x), and R_H(x) dependences for Pb_1–xCu_xS (0 < x ≤ 0.011), though the acceptor behavior of the copper impurity was also apparent in these dependences.