“…Rare-earth-activated inorganic phosphor materials have been widely used in modern lighting and display fields, such as fluorescent lamps, cathode-ray tubes, field emission displays for their well-defined transitions within the 4f electronic shells [1][2][3][4][5]. As the most frequently used activator ions in luminescent materials, the Eu 3? and Tb 3? are excellent activator which mainly show emissions due to transitions of 5 D 0 to 7 F J (J = 1, 2, 3, 4) in the red region and 5 D 4 to 7 F J (J = 6, 5, 4, 3) in the green region, respectively [6,7].…”