Fabrication of Ce3+–Cr3+ co-doped yttrium aluminium gallium garnet transparent ceramic phosphors with super long persistent luminescence

Persistent Luminescence of ZnGa2O4:Cr3+ Transparent Glass Ceramics: Effects of Excitation Wavelength and Excitation Power

“…The persistent emission could be detected for 10 h after the excitation stopped. This result underlines that glass ceramics can present efficient excitation and good emission collection owing to their transparencies; therefore, they can offer excellent persistent luminescence properties. The excitation of the entire sample volume leads to emission from the ensemble of ZGO‐GC nanoparticles, whereas ZGO powder gives only emission from the surface.…”

Novel persistent phosphors of lanthanide–chromium co-doped yttrium aluminum gallium garnet: design concept with vacuum referred binding energy diagram

“…Therefore, in this work, Pr 3+ -Cr 3+ , Nd 3+ -Cr 3+ , Tb 3+ -Cr 3+ , Dy 3+ -Cr 3+ co-doped YAGG phosphors were prepared and their feasibility for PersL are discussed based on this diagram. 18 and Y 3 Al 1.99 Cr 0.01 Ga 3 O 12 (YAGG:Cr) 19 prepared by the same method were used as reference samples. All the as-prepared samples were confirmed to be single phase (ICPDS: No.…”

“…3(d). The decay profiles of the YAGG:Ce-Cr phosphor 18 and the compacted pellet made of the SAO:Eu-Dy commercial phosphor (LumiNova-GLL300FFS, Nemoto & Co. Ltd,) 15 are also plotted as references.…”

“…[15][16][17] The enhanced persistent luminance of the YAGG:Ce-Cr (x = 3) transparent ceramic persistent phosphor at 60 min after ceasing blue excitation could reach 88 mcd m À2 , which is over three times higher than that of the compacted pellet made of commercial SAO:Eu-Dy powder (25 mcd m À2 ). 18 On the other hand, we also developed Cr 3+ singly-doped YAGG (YAGG:Cr) persistent phosphors with a similar garnet matrix showing deepred PersL (B690 nm), in which Cr 3+ ions act both as emitting centers and trap centers. 19,20 The persistent radiance (in units of mW sr À1 m À2 ) of the optimized composition (x = 3) was even higher than that of the ZnGa 2 O 4 :Cr 3+ persistent phosphor, which is widely used for in vivo bio-imaging applications.…”

Near-infrared multi-wavelengths long persistent luminescence of Nd3+ ion through persistent energy transfer in Ce3+, Cr3+ co-doped Y3Al2Ga3O12 for the first and second bio-imaging windows

“…[21][22][23][24] In this material, Cr 3þ acts as an electron trap with ideal trap depth at x ¼ 3 for persistent luminescence of Ce 3þ working at room temperature (RT). Based on our previous work, we developed a persistent phosphor of Y 3 Al 2 Ga 3 O 12 :Nd 3þ , Ce 3þ , Cr 3þ (YAGG:Nd-Ce-Cr).…”