Pb0.85Ge0.15Te

Pb0.85Ge0.15Te is a lead-germanium telluride alloy belonging to the IV-VI narrow-bandgap semiconductor family, engineered to optimize the thermoelectric properties of lead telluride through partial germanium substitution. This material is primarily investigated for thermoelectric energy conversion applications where waste heat recovery and solid-state cooling are critical, offering improved figure-of-merit and thermal stability compared to pure PbTe, particularly in intermediate-temperature operating ranges (300–600 K). The germanium alloying reduces lattice thermal conductivity while maintaining electronic transport properties, making it attractive for power generation and refrigeration systems where conventional mechanical approaches are impractical or inefficient.