Indium is widely used in the electronics industry, particularly in the production of transparent conductive films for touchscreens, liquid crystal displays (LCDs), and organic light-emitting diodes (OLEDs). It is a key component of indium tin oxide (ITO), a material that combines high electrical conductivity with optical transparency, making it ideal for flat panel displays and solar cells.

In semiconductor applications, indium is used to create compounds like indium phosphide and indium antimonide, which are essential in high-speed electronics, infrared detectors, and laser diodes. It also serves as a thermal interface material in high-performance computing and optoelectronic devices due to its excellent heat transfer properties.

Indium is used in low-melting-point alloys for specialized solders and thermal fuses, especially in aerospace and safety systems. Its ability to form reliable, oxidation-resistant bonds makes it valuable in cryogenic and vacuum sealing applications.

Additionally, indium is employed in nuclear medicine as a radioactive tracer (e.g., indium-111) for imaging and diagnosing tumors and infections. It is also used in some dental alloys and as a coating in bearings to reduce friction and wear.