Study of the synthesis techniques and photoluminescence properties of Eu3+- Tb3+ co-doped phosphors: A review

Europium (Eu³⁺) and Terbium (Tb³⁺) co-doped phosphors have garnered significant attention in recent years due to their photoluminescence properties and potential applications in various fields. Lanthanide co-doped phosphors are outstanding luminous substances that are implemented to solve the limitations of traditional lighting sources based on sulphide. Over the last decade, increased research emphasis on these phosphors has resulted in a dramatic improvement in their photoluminescence performances, as well as a wide range of luminescence hues that may be used in a number of applications. This review article discusses the evolution of lanthanide (Eu³⁺-Tb³⁺) co-doped phosphors, with an emphasis on the different production techniques, sustained illumination processes, and prospective implications for solid-state lighting innovation. To produce highly crystalline phosphors at low temperatures, the solution combustion approach has proven to be more effective than other techniques including solid state, sol-gel, and hydrothermal procedures, etc. The role of lanthanide ions in photoluminescence tunability has received special attention. In addition, a detailed explanation of the photoluminescent (PL) features of these co-doped luminescent compounds has been described. Along with their uses, their excitation wavelength, emission wavelength, and Commission Internationale de l′éclairage (CIE) coordinates are also mentioned for comparison studies. These co-doped luminescent materials have broad use in several displays and solid-state lighting device applications because of the numerous energy transitions of rare earth ions inside the host lattice. The perusal of this review will be relevant for researchers exploring phosphors.