K₂Ln(PO₄)(WO₄):Tb³⁺,Eu³⁺ (Ln = Y, Gd and Lu) phosphors: highly efficient pure red and tuneable emission for white light-emitting diodes

Abstract

K2Tb0.5Eu0.5(PO4)(WO4) red phosphor with an internal quantum efficiency of 76.45% is produced. Furthermore, the luminescence colour can be tuned from green to red by adjusting the ratio of Tb3+ and Eu3+.

Tunable lanthanide/transition metal ion‐doped novel phosphors for possible application in w‐LEDs: a review

“…Wen et al . reported pure red emission, high conversion efficiency, and near‐UV excitation for K 2 Ln(PO 4 )(WO 4 ) (Ln = Y, Gd, or Lu) doped with Tb 3+ or Eu 3+ . The emission colour of these phosphors could be tuned from green to yellow, orange and subsequently red by controlling the ratio of Tb 3+ and Eu 3+ .…”

Ambient‐Pressure Stabilization of β‐GdB3O6 by Doping with Bi3+ and Color‐Tunable Emissions by Co‐Doping with Tb3+ and Eu3+: The First Photoluminescence Study of a High‐Pressure Polymorph

“…However,w ith developments in semiconductor chips, UV-emitting chips with shorter wavelengths may become availablei nt he future. Second, it was necessary to clarify whether an effective energy transfer from Tb 3 + to Eu 3 + exists, such as those reported for other systems( Ba 6 Bi 9 B 79 O 138 , [46] La 3 GaGe 5 O 16 , [61] and K 2 RE(PO 4 )(WO 4 )( RE = Y, Gd, Lu) [62] ). As shown in Figure 9a, inset, it is easy to recognize that the absorption peaks at l = 349, 357, 368, and 376 nm can be assigned to Tb 3 + absorptions, and those at l = 361, 375, 378,3 82, 394 and 398 nm belong to at l = 543 and 616 nm were monitored, as shown in Figure 12a and b.…”

Synthesis and luminescence properties of NaAl11O17:Mn2+ green phosphor for white LEDs

“…Rare earth (RE) and transitional metal (TM) ions have been regarded as the important luminescence sources [1,2]. In recent years, new luminescent materials doped with RE or TM ions have been investigated and developed largely owing to their widely applications in many fields, such as cathode ray tubes, field emission displays, light-emitting diodes (LEDs), X-ray imaging scintillators, and plasma display panels [3][4][5]. At present, white LEDs have been considered as the most promising light source for solid state lighting due to their high luminous efficiency, long lifetime, environmental friendliness, and energy-saving [6].…”