Enhancement of Photoluminescence and Color Purity of CaTiO₃:Eu Phosphor by Li Doping

Abstract

High color purity red phosphors of Ca 1À3/2x Eu x TiO 3 and Ca 1À2x Eu x Li x TiO 3 (0 < x 0.3) are synthesized via a solidstate reaction method. The red emission photoluminescence intensity and color purity are enhanced by the incorporation of Li + into CaTiO 3 :Eu 3+ . The Li + doping increases the emission probability from 5 D 0 state, increases photoluminescence intensity by 1.6 times, increases color purity to 92.1%, and shortens the decay time. With increasing Eu 3+ and Li + content, the color coordinates approach the ideal red chromaticity values, coming closer than commercial Y 2 O 2 S:Eu 3+ red phosphor.

Red-light-emitting inorganic La2CaZnO5 frameworks with high photoluminescence quantum efficiency: Theoretical approach

“…13 concentration. Thus, it can clearly says that the 5 mol% Eu 3+ doped LCZ host showed a maximum red emission and good red chromaticity with high colour purity, and can be utilized effectively in light emitting and display devices combined with blue (GaN) chips [45].…”

Enhanced fluorescence and heat dissipation of calcium titanate red phosphor based on silver coating

“…Wu et al gained enhanced photoluminescence of CTOE phosphor by the doping of Li ions [20]. In our previous work, regular CTOE rectangular prisms had a better thermal stability than common ones [21], and controllable synthesis of CTOE phosphors with magic-column spherical, magic-cube spherical or polyhedral shapes leaded to an enhancement of quantum yield [22] .…”

Strong red-emission of Eu 3+ :Li 4 Ti 5 O 12 powders for phosphor applications

“…Multiple titanates have been explored as potential host materials, including BaTiO 3 [8], SrTiO 3 [9], and CaTiO 3 [10]. Meanwhile, many reports investigate the effect of lithium addition on the enhancement of the luminescence behavior and luminescence efficiency of RE ions [10][11][12][13]. Lithium tantalite [14], lithium niobate [15], and lithium aluminate [16] have been extensively studied as lithium-based matrices.…”

“…Accordingly, RE doped titanates can be readily applied to optoelectronics applications [7]. Multiple titanates have been explored as potential host materials, including BaTiO 3 [8], SrTiO 3 [9], and CaTiO 3 [10]. Meanwhile, many reports investigate the effect of lithium addition on the enhancement of the luminescence behavior and luminescence efficiency of RE ions [10][11][12][13].…”