Role of site symmetry in photoluminescence spectrum of Eu²⁺ doped phosphors - A review

Abstract

The role of site symmetry is one of the important parameters in the emission spectrum of the phosphor. The emission from the phosphor can be tuned due to alteration in the site symmetry by selecting appropriate synthesis procedure. The spectral shift in the emission spectrum can be achieved by variation in the coordination number (CN) or by tuning symmetry in a coordination environment. Few reported phosphors such as Eu2+ doped Ca3Mg3(PO4)4, Ba2CaMg2Si6O17 and Ca3Al2O6 where the spectral shift is noted are used in this review for the analysis.