Research progress in cyan and blue phosphors

Abstract

In recent years, the research and development of new white LEDs have attracted extensive attention. Whether the new LEDs have a higher color rendering index and can simulate natural sunlight without damaging human health is the issue of concern. Therefore, we introduce in detail the ultraviolet (UV) excited luminescence characteristics of Eu ions, Ce ions, and other ions in different host lattice (aluminate, silicate, phosphate, and borate) matrices. This paper summarizes the introduction and application of rare-earth ions as activation center phosphors and expounds on the application potential of cyan and blue phosphors in many fields such as display technology from the aspects of excitation and emission characteristics, lifetime, color purity, and thermal stability. Finally, we put forward our views on improving the thermal stability of phosphors and selecting crystals with suitable structures as the host for the preparation of phosphors.