Si0.1Ge0.9

Si₀.₁Ge₀.₉ is a silicon-germanium alloy heavily weighted toward germanium (90%), belonging to the group IV semiconductor family. This material is engineered to achieve germanium-like electronic properties while incorporating small amounts of silicon to modulate bandgap, lattice constant, and thermal characteristics for specific device applications. It is primarily used in high-speed optoelectronic and infrared detector applications, where the germanium-rich composition enables efficient light absorption in the near-infrared and mid-infrared regions while silicon incorporation helps manage lattice matching to silicon substrates and improve thermal stability compared to pure germanium.