In0.005Te1Pb0.995

In0.005Te1Pb0.995 is a heavily lead-telluride-based narrow bandgap semiconductor with minimal indium doping (0.5%), representing a variant within the IV-VI narrow-gap semiconductor family. This material is primarily of research interest for infrared detection and thermoelectric applications, where the telluride base provides narrow bandgap properties suited to mid- to far-infrared wavelengths, while indium doping modulates electronic and thermal transport characteristics. The composition is distinct from conventional PbTe and suggests optimization for either infrared photodetector sensitivity or thermoelectric figure-of-merit in specialized temperature regimes, though such heavily doped variants remain largely experimental.