(A) Absolute Seebeck coefficient |S| versus carrier concentration n_H for Ag₂Se_1–xTe_x materials at 300 K. Data of other Ag₂Se-based materials are taken from Refs. [29,43]. The dashed line represents the calculated Pisarenko curve by the SPB model. (B) Relations of weighted mobility and lattice thermal conductivity with Te content; the dashed lines are calculated curves. (C) Temperature dependence of zT value for Ag₂Se_1–xTe_x samples with optimized Ag content. (D) zT value versus carrier concentration n_H for Ag₂Se_1–xTe_x materials at 300 K. Data of other Ag₂Se-based materials are taken from Refs. [29,43]. The dashed line represents the calculated Pisarenko curve by the SPB model.