Energy transfer between two luminescent centers and photoluminescent properties of Ca4-yLa6(AlO4) (SiO4)6-O1-/2: yEu2+apatite structure phosphors

Ionic selective occupation, lattice modulation and photoluminescence properties of garnet typed orange-yellow phosphors for white-light-emitting diodes

“…To demonstrate that Mn 2+ occupies two distinct luminescent sites, the excitation spectra at 600 nm and 750 nm were examined, respectively. There are two distinct excitation spectra, demonstrating that Mn 2+ occupies two distinct luminescent sites [24] . The emission peak of Mn 2+ has a certain relationship with the coordination environment, which can be calculated by the equation (1) reported by Van Uitert [25,26]…”

Tb3+ and Sm3+ co-doped Ca2La3(SiO4)3F phosphor: synthesis, color regulation, and luminescence properties

“…Light emitting diodes (LEDs) are considered to represent the fourth generation of light sources in the general lighting industry because of their exceptional and unique qualities. [1][2][3] Because LEDs possess attractive colors, a tiny form factor, and ease of construction, they have widespread usage in the decoration and night illumination of cities. [4][5][6] Combining phosphors with n-UV chips (350-420 nm) is one approach that LEDs gives practical colors in their light output.…”