Optical properties of Sr2LuNbO6:Mn4+ deep-red phosphor: crystal-field splitting and multimode vibrational coupling

Fluorescence properties of novel deep-red phosphor LiMg4SbO7:Mn4+ with excellent quantum efficiency and color purity for warm white LEDs

“…8 In addition, compared to rare earth ions, Mn 4+ has a significant price advantage, so it has received widespread attention. Therefore, researchers have developed a series of Mn 4+ -activated red fluorescent materials, mainly focusing on metallic oxide as the matrix, such as La 2 LiTaO 6 :Mn 4+ , 9 SrLaNaTeO 6 :Mn 4+ , 10 Sr 2 LuNbO 6 :Mn 4+ , 11 etc .…”