Used as a precursor in the production of europium-doped phosphors for color displays and fluorescent lamps. Enables red emission in cathode ray tubes (CRTs) and plasma display panels. Employed in the synthesis of luminescent materials for security inks and anti-counterfeiting tags due to its strong red fluorescence under UV light. Also utilized in research for developing optical sensors and in some medical imaging applications. Serves as a dopant in solid-state devices and in the preparation of europium oxide coatings.