Influence of co-doping Si ions on persistent luminescence of ZnGa_2O_4: Cr^3+ red phosphors

Dual-Wavelength Zn0.2Ga1.1Si0.9O3.65:Cr Persistent Luminescence Nanoparticles for Dynamic Multimode Anticounterfeiting

“…Based on the previous studies, doping of Si 4+ should preferentially occupy the Zn vacancies and then substitute for Ga 3+ at B-sites during the crystalline proceeding. , In other words, Si 4+ was doped into ZnGa 2 O 4 , and with the substitution of 2Ga 3+ ( r = 0.62 Å) by Zn 2+ ( r = 0.88 Å) and Si 4+ ( r = 0.4 Å), the d value was increased, leading to the diffraction peaks shifting to a lower angle. The results of Zn 0.2 Ga 1.1 Si 0.9 O 3.65 :Cr 3+ (Figure S1 in the Supporting Information (SI)) are similar to those of Ge-doped ZnGa 2 O 4 …”

Applying calcium fluoride and silica particles: A solution to improve color homogeneity of pc-WLEDS

“…The scattering enhancement particles (SEPs) are the source of light scattering effect. According to Mie-scattering theory, the presence of SEPs in conformal phosphor pc-WLED structure enables the scattering effect, which will be measured by MATLAB [21]- [25]. The important values of scattering coefficient μsca(λ), the anisotropy factor g(λ), the reduced scattering coefficient δsca(λ) and the scattering amplitude functions S1(θ) and S2(θ) are calculated using the (1) presented:…”

Improving and broadening luminescence in Gd2−xAlxGaSbO7:Cr3+ phosphors for NIR LED applications

“…6 Moreover, Cr 3+ provides strong blue absorption, [16][17][18] which can be effectively stimulated by commercial blue chips. Consequently, extensive efforts have been devoted to exploring Cr 3+ -doped NIR phosphors, such as, Y 3 Al 5−x Ga x O 12 :Cr 3+ , 20 ZnGa 2 O 4 :Cr 3+ , 21 BaZrSi 3 O 9 :Cr 3+ , 22 ScBO 3 :Cr 3+ , 23 La 2 MgZrO 6 : Cr 3+ , 24 Gd 3 Sc 2 Ga 3 O 12 :Cr 3+ , 25 Na 3 Al 2 Li 3 F 12 :Cr 3+26 and Gd 3 Zn x Ga 5−2x Ge x O 12 :Cr 3+ . 27 However, developing high-performing Cr 3+ -incorporated materials with highly efficient broadband NIR luminescence and superior thermal stability that meet the requirements of commercial applications is still an immense challenge.…”