Violet-blue fluorescent powder Y3GaO6 doped with Bi3+ ions, the manufacturing process of this fluorescent powder, and the packaging process for white light-emitting diodes with a color rendering index of 96 based on this fluorescent powder.

Abstract

The invention proposes a Y3GaO6 violet-blue ionic fluorescent powder doped with Bi3+ ions, a process for fabricating this fluorescent powder, and a process for packaging a white light-emitting diode (WLED) with a color rendering index (CRI) of 96 based on this fluorescent powder. The Y3GaO6 fluorescent powder doped with 2.5 mol% Bi3+ has a particle size of approximately 1 µm to 1.5 µm, high purity, color purity of 95.6%, best absorption at a wavelength of 298 nm, and emission in the violet-blue region around 410 nm with a spectral half-width of approximately 72 nm. This fluorescent powder exhibits strong absorption in the UV region with an absorption efficiency of approximately 98.4% and an emission efficiency of 84.3%. This powder can also be used to manufacture white light-emitting diodes with a color rendering index (CRI) of up to 96 based on a combination of 310 nm LED chips, Y3GaO6:Bi3+ powder, Y2O3:Bi3+ powder, and (Ca / Sr)AISiN3:Eu2+.