Abstract Recently, much attention has been attracted on the optical properties based on the phosphors for LED light. A near Ultraviolet (n-UV) and blue chip activated phosphor of CaLi6La2Nb2O12:Bi3+, Mn4+ is synthesized by a traditional SSR method. Phase purity and lattice structure of the crystal have been confirmed and investigated by XRD, Rietveld refinement, FE-SEM and TEM. The luminescence performances of the series phosphors are investigated by diffuse reflection spectra (DR), Raman scattering spectra, steady-state PL spectra and the measurement of lifetime., the CaLi6La2Nb2O12:Bi3+, Mn4+ exhibits emission peaked at ∼466 and ∼711 nm Under excited at 312 nm. The Dq, B and C are calculated to estimate the nephelauxetic effect of Mn4+ in [NbO6] octahedral lattice. The coordinate shifting could be controllable through the energy transfer Bi3+→Mn4+, which can be verified by PL spectra and decay lifetimes. Finally, by coating the blend of red CaLi6La2Nb2O12:0.03Bi3+,0.015 Mn4+ and Y3Al5O12:Ce3+ (YAG:Ce3+) phosphors onto the blue LED chip, a LED device with good performances (x = 0.36, y = 0.36, CRI = 86.6, CCT =4220 K) can be achieved. Hence, CaLi6La2Nb2O12:Bi3+, Mn4+ is a good material of red emission.

中文翻译：

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一种深红色发光 Bi3+/Mn4+ 掺杂的 CaLi6La2Nb2O12 磷光体：发光和能量转移特性

摘要 近年来，基于LED 荧光粉的光学特性引起了人们的广泛关注。CaLi6La2Nb2O12:Bi3+, Mn4+ 的近紫外 (n-UV) 和蓝片激活荧光粉是通过传统的 SSR 方法合成的。晶体的相纯度和晶格结构已通过 XRD、Rietveld 精修、FE-SEM 和 TEM 得到确认和研究。通过漫反射光谱 (DR)、拉曼散射光谱、稳态 PL 光谱和寿命测量研究了系列荧光粉的发光性能。CaLi6La2Nb2O12:Bi3+, Mn4+ 显示发射峰值在 ~466 和 ~711 nm 下在 312 nm 激发。计算 Dq、B 和 C 以估计 Mn4+ 在 [NbO6] 八面体晶格中的散射效应。坐标移动可以通过能量转移 Bi3+→Mn4+ 进行控制，这可以通过 PL 光谱和衰变寿命来验证。最后，通过将红色 CaLi6La2Nb2O12:0.03Bi3+,0.015 Mn4+ 和 Y3Al5O12:Ce3+ (YAG:Ce3+) 荧光粉的混合物涂覆到蓝色 LED 芯片上，得到了具有良好性能 (x = 0.36, y = 0.36, CRI = 8) 的 LED 器件CCT = 4220 K) 可以实现。因此，CaLi6La2Nb2O12:Bi3+, Mn4+ 是一种很好的发红光材料。