Pb0.7Ge0.3Te

Pb₀.₇Ge₀.₃Te is a lead-germanium-tellurium ternary semiconductor alloy belonging to the IV-VI narrow-bandgap family, engineered to tune electronic and thermal properties between binary PbTe and GeTe compounds. This material is primarily investigated for thermoelectric energy conversion applications where the bandgap engineering and phonon scattering control enable efficient direct heat-to-electricity conversion, particularly in mid-temperature regimes (200–500 K); it is also explored for infrared detection and sensing where its tunable bandgap and carrier mobility are advantageous compared to single-binary alternatives.