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

High color purity red phosphors of Ca 1−3/2 x Eu x TiO 3 and Ca 1−2 x Eu x Li x TiO 3 (0 < x ≤ 0.3) are synthesized via a solid‐state 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.