Synthesis, characterization and luminescence studies of rare earth activated Sr₂SiO₄ phosphor: a review

This review includes research papers on different method of preparation of rare earth activated Sr₂SiO₄ phosphors and its luminescence studies. Here in Sr₂SiO₄ has attracted great interest due to its special structure features, excellent physical and chemical stability. Besides, it absorbs ultraviolet radiation and emits white light when activated by different rare earth ions. Different synthesis techniques were compared and it is found that sol–gel synthesis technique is best for preparation of rare earth activated Sr₂SiO₄ phosphors. Literature related to characterization techniques such as X-ray diffraction techniques, scanning electron microscopy, transmission electron microscopy and other studies are also compared. Photoluminescence studies for white light emitting diode of various rare earth phosphors are compared with Sr₂SiO₄ phosphor reported in this review. Also some luminescence techniques such as thermoluminescence glow curve analysis and some spectroscopic parameters are also compared. The review end with some important conclusion related to rare earth activated Sr₂SiO₄ phosphors with proper justifications.