Used in the production of phosphors for color television screens and fluorescent lamps, where it emits red light when excited. Employed in research for developing luminescent materials and sensors due to its strong red fluorescence. Also utilized in the synthesis of other europium-containing compounds for use in optical devices and laser materials. Plays a role in nuclear technology as a neutron absorber in control rods. Investigated for applications in bioimaging and as a dopant in solid-state devices.