Used as a precursor in the synthesis of luminescent materials, particularly in the production of red phosphors for LED lighting and display technologies. Its strong red emission under UV excitation makes it valuable in anti-counterfeiting inks and security labels. Also employed in research for doping into solid-state lasers and optical coatings. Serves as a catalyst in certain organic reactions and is utilized in the preparation of europium-based nanomaterials for bioimaging due to its sharp emission lines and long fluorescence lifetime.