Terbium chloride is widely used in the production of luminescent materials, particularly in green phosphors for television and computer monitor screens, as well as in fluorescent lamps. It serves as a dopant in solid-state devices and is essential in creating efficient light-emitting diodes (LEDs) that emit green light. The compound is also employed in research for its magnetic properties, especially in studies involving lanthanide-based single-molecule magnets. In addition, terbium chloride finds application in biochemistry as a fluorescence probe due to its strong and characteristic emission under UV light, enabling detection and analysis of biological molecules. It is further utilized in optical coatings and laser materials where precise control of light emission is required.