Abnormal photo-stimulated luminescence in Ba2Ga2GeO7: Tb3+, Bi3+

A multicolor persistent luminescent phosphor Sr2Ga2GeO7:Pr3+ for dynamic anticounterfeiting

“…It is well known that a PersL phosphor consists of the host, emitters, and traps and the PersL color of a PersL phosphor usually depends on the emitters. Generally, the broadband emitters including d n TM and 5 d ‐4 f RE 3+ ions show the continuous emission bands in visible spectrum similar to the sunlight, and thus it is more suitable for lighting . On the contrary, the narrowband emitters (4 f ‐4 f RE 3+ ) commonly show emission lines with excellent color gamut, and therefore it shows more advantages in display.…”

“…Generally, the broadband emitters including d n TM and 5d-4f RE 3+ ions show the continuous emission bands in visible spectrum similar to the sunlight, and thus it is more suitable for lighting. [9][10][11][12] On the contrary, the narrowband emitters (4f-4f RE 3+ ) commonly show emission lines with excellent color gamut, and therefore it shows more advantages in display. However, the 4f-4f transitions of RE 3+ ions are hardly affected by the crystal field due to the shielding of outer 5s 2 5p 6 electrons, and therefore the luminescent color of RE 3+ in phosphors are hardly tuned.…”

A novel pale‐yellow Ba2ZnGe2O7:Bi3+ phosphor with site‐selected excitation and small thermal quenching

“…As some of the typical non‐rare earth activators, Bi 3+ ‐doped phosphors exhibit abundant emission colors from visible to near‐infrared light due to the 3 P 1 ‐ 1 S 0 transitions of Bi 3+ ions. Moreover, due to the outer electron exposure of the 6S 2 electronic configuration, the emission colors of Bi 3+ ions strongly depend on the coordination environment of the host lattice, such as the bond distance, coordination number, lattice symmetry, and so on . Therefore, further exploration on the luminescence performance of Bi 3+ ions in different hosts is interesting.…”

Insight into a novel rare‐earth‐free red‐emitting phosphor Li3Mg2NbO6:Mn4+: Structure and luminescence properties

“…13 Thus, the ideal red phosphor should with possess a combination of such characteristics as facile synthesis, low cost, relative broad absorption band, and high luminescence efficiency. [15][16][17] Among Mn 4+ -doped red phosphors, fluoride compounds usually exhibit efficient sharp emission peaking at ~630 nm. As one of the important non-rare-earth activators, Mn 4+ is featured by the sharp red emission lines and broad excitation band due to its distinct outer 3d 3 electron configuration.…”