Used in the production of phosphors for color television screens, fluorescent lamps, and LED lighting due to its ability to emit red light when excited. Also employed in the manufacturing of specialized glass and optical materials. Serves as a dopant in solid-state devices and in research for nuclear applications, including neutron absorption studies. Additionally, utilized in anti-counterfeiting technologies, such as luminescent inks for banknotes and secure documents, owing to its unique luminescence properties that are hard to detect or replicate.