Gallium antimonide is primarily used in the production of optoelectronic devices, such as infrared detectors and light-emitting diodes (LEDs), due to its ability to efficiently convert electrical energy into light in the infrared spectrum. It is also employed in high-speed electronics and transistors, where its semiconductor properties enable faster switching speeds and improved performance. Additionally, the compound finds applications in thermophotovoltaic systems, which convert heat directly into electricity, making it valuable in energy harvesting technologies. Its use in laser diodes, particularly for fiber-optic communication systems, further highlights its importance in modern telecommunications.