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High quality p-type PbTe-CdTe monocrystalline alloys containing up to 10at.$\%$ of Cd are obtained by self-selecting vapor transport method. Midinfrared photoluminescence experiments are performed to follow the variation ofthe fundamental energy gap as a function of Cd content. The Hall mobility,thermoelectric power, thermal conductivity and thermoelectric figure of meritparameter $ZT$ are investigated experimentally and theoretically payingparticular attention to the two-valence band structure of the material. It isshown that the heavy-hole band near the $\Sigma$ point of the Brillouin zoneplays an important role and is responsible for the Pb$_{1-x}$Cd$_x$Te holetransport at higher Cd-content. Our data and their description can serve as thestandard for Pb$_{1-x}$Cd$_x$Te single crystals with $x$ up to 0.1. It isshown, that monocrystalline Pb$_{1-x}$Cd$_x$Te samples with relatively low Cdcontent of about 1 at.\% and hole concentration of the order of 10$^{20}$cm$^{-3}$ may exhibit $ZT \approx$ 1.4 at 600 K.

Two-valence band electron and heat transport in monocrystalline PbTe-CdTe solid solutions with high Cd content