Indium is widely used in the electronics industry, particularly in the production of transparent conductive coatings 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 fiber optic communications.

It also serves as a thermal interface material in high-performance computing and aerospace systems due to its excellent thermal conductivity and ability to form reliable solder joints at low temperatures. Indium-based solders are valued for their ductility and ability to bond dissimilar materials, including glass and ceramics, which is useful in cryogenics and vacuum systems.

Additionally, indium is used in some nuclear reactors as a neutron absorber and in medical imaging devices due to its unique X-ray absorption properties.