Research Progress of Europium Complexes Luminescent Materials

Rare earth is a general term for 17 chemical elements with atomic numbers of 21, 39 and 57~71 in group IIIB in the periodic table. Lanthanide complexes can show unique linear emission bands and have very long luminous lifetime. Lanthanide complexes can be used in electroluminous (EL) devices, lasers and light-emitting biosensors in visible and near-infrared spectra. Therefore, it is of great significance to find new lanthanide luminous complexes. The emission peak of rare earth europium complex is mainly located in the characteristic emission wavelength of 5 D 0 → 7 F 2 of Eu 3+ . The emission wavelength is about 613nm, and it shows the fluorescence characteristics of europium ions. In order to further study the subject, this paper will focus on the current research on luminous rare earth complexes-organic complexes centered on Eu 3+ (emission red light). This paper summarizes the luminous principle of rare earth europium and its application in some fields, and expounds the existing problems at present and looks forward to its application prospect in the future.