SiGe

SiGe (silicon-germanium) is a compound semiconductor alloy that combines silicon and germanium in a crystalline lattice structure, offering tunable electronic properties by adjusting the Ge content. The material is widely used in high-frequency analog and mixed-signal integrated circuits, including RF amplifiers, power transistors, and heterojunction bipolar transistors (HBTs) where superior carrier mobility and operating speed are critical advantages over pure silicon. SiGe is also explored for infrared detectors, photovoltaic devices, and advanced optoelectronic applications where its direct bandgap characteristics at certain compositions enable efficient light emission and detection.