Luminescent properties and energy transfer of double-emitting NaSrPO4:Eu2+,Tb3+ phosphor for near-UV white LEDs

Eu2+-sensitized Sr6Ca4(PO4)6F2:Tb3+ phosphors: An investigation on their luminescence and energy transfer

“…Therefore, by co-doping Eu 2+ or Ce 3+ with Tb 3+ , the weak absorption and emission of Tb 3+ can be overcome. Moreover, tunable color tone from blue to green can be obtained, as previously reported [6][7][8].…”

Warm-white luminescence of Dy3+ and Sm3+ co-doped NaSrPO4 phosphors through energy transfer between Dy3+ and Sm3+ ions

“…1. All diffraction peaks of these specimens present a good match with the standard phase of NaSrPO4 (PDF#33-1282) [32] and can be indexed as a monoclinic crystal with lattice parameters of a = 20.414 Å, b = 5.429 Å, and c = 17.426 Å. This proves that NaSrPO4:Dy 3+ samples with NaSrPO4 structure are successfully prepared and no obvious impurity phases corresponding to Dy 3+ appear.…”

“…Wet chemical methods can provide low synthesis temperatures, good crystal structures, and excellent luminescence properties. However, there has been little research on its structure or the preparation of rare-earth-doped NaSrPO4 by wet chemical methods [32][33][34], especially in Dy 3+doped NaSrPO4 white-emitting phosphors [35].…”

Hydrothermal synthesis and tunable luminescence of NaBaPO4:Eu2+/Tb3+ phosphors

“…Generally, Tb 3+ doped materials show green emission coming from the 5 D 4 → 7 F 5 transition of Tb 3+ [5]. However, the absorption efficiency of Tb 3+ ion is low in the near-ultraviolet region due to the absolute forbiddance of the 4f-4f electric dipole transitions [6]. One of effective routes to solve this problem is to utilize energy transfer from the sensitizers to activators in one host.…”

“…One of effective routes to solve this problem is to utilize energy transfer from the sensitizers to activators in one host. It had been reported that Eu 2+ can act the sensitizer of Tb 3+ in some hosts [2,4,[6][7][8].…”