Si0.226Ge0.774

Si0.226Ge0.774 is a silicon-germanium (SiGe) alloy with a germanium-rich composition, belonging to the IV-IV semiconductor family used in high-performance optoelectronic and high-frequency electronic devices. This material is primarily employed in infrared detectors, heterojunction bipolar transistors (HBTs), and integrated photonics where its tuned bandgap and lattice properties enable superior performance over elemental Si or Ge alone. The high germanium content makes this alloy particularly notable for mid- to long-wavelength infrared sensing applications and for achieving enhanced carrier mobility in RF/mmWave integrated circuits, though careful thermal management is required due to lattice mismatch with standard Si substrates.