Pb0.8Sn0.2Te

Pb₀.₈Sn₀.₂Te is a lead-tin telluride alloy belonging to the IV-VI narrow-bandgap semiconductor family, where partial substitution of lead with tin modulates the electronic properties for mid-infrared applications. This material is primarily developed for infrared detectors, thermal imaging systems, and thermoelectric devices operating in the 3–14 μm wavelength range, offering improved performance over pure PbTe in specific temperature windows and detection scenarios. The tin alloying addition allows engineers to tune the bandgap and lattice constant while maintaining the high carrier mobility and sensitivity characteristic of lead telluride-based compounds.