Synthesis and luminescent properties of Eu3+/Eu2+ co-doped calcium aluminosilicate glass–ceramics

Chemical tunability of europium emission in phosphate glasses

“…5 D 0 -7 F 2 is an electric dipole allowed transition and its intensity is related to variations in Eu 3+ local environment, whereas the transition 5 D 0 -7 F 1 is a magnetic dipole allowed transition, thus it is slightly influenced by the Eu 3+ ion surrounding [2] The intensity ratio of 5 D 0 -7 F 2 to 5 D 0 -7 F 1 increases as the degree of Eu-O covalence increases [21] and when symmetry of site decreases [22]. Furthermore, Bouchouicha and coauthors [23] reported changes occurring to non-degenerate 5 D 0 -7 F 0 emission lines as variations in the Eu 3+ local environment.…”

Devitrification Behavior of Sol-Gel Derived ZrO2-SiO2 Rare-Earth Doped Glasses: Correlation between Structural and Optical Properties

“…Visible to near-infrared (NIR) down-conversion has been demonstrated for Tb and Yb doped nanocrystalline ZrO 2 [10]. Thus, devitrification of the glasses could lead to more luminescence efficient GC materials since emission QE of crystalline materials is typically higher, as has been successfully demonstrated for silica-hafnia glass ceramics [5,11] or Eu doped aluminosilicate glasses [12]. Metal-silicate systems, where the metal can be Zr, Hf, Y or La, deserve special attention here since these materials are particularly suitable for decomposition into a metal-and silica-rich phases in a quite broad range of SiO 2 content [13], which affects the crystallization behavior [14].…”

A novel Eu3+/Eu2+ co-doped MgSrLa8(SiO4)6O2 single-phase white light phosphor for white LEDs

“…The emission band position can be tuned by selecting different host materials. [31][32][33][34][35] Nevertheless, only a few studies have been considered this topic, thus inspiring us to explore the luminescence properties of Eu 2+ /Eu 3+ co-doped single-phase white-light-emitting phosphors.…”