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

The concentration dependences of Seebeck coefficient S , resistivity ρ, thermal conductivity κ tot , and Hall constant R H are studied for mixed Pb 1– x Ag x S and Pb 1– x Cu x S 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 x S 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– x Cu x S (0 < x ≤ 0.011), though the acceptor behavior of the copper impurity was also apparent in these dependences.