Controlled synthesis and luminescent properties of Eu2+(Eu3+), Dy3+-doped Sr3Al2O6 phosphors by hydrothermal treatment and postannealing approach

Energy transfer mechanism and luminescence properties of color tunable LaPO4:Tm,Eu phosphor

“…Sharp-line spectra, attributed to well-shielded f-f electron transitions, are a unique property of Re 3+ activators. So, we can see that electron transitions in the 1 D 2 → 3 F 4 and 1 G 4 → 3 H 6 for Tm 3+ [1] and the 5 D 0 → 7 F J (J = 0, 1,2,3,4) for Eu 3+ exhibit sharp blue and red emission peaks, respectively [2,3]. Phosphors that emit in a narrower emission band usually possess high color purity and show stable luminescence.…”

The effect of Ba/Mg impurities on the phase formation and photoluminescence properties of (Sr3−xMx)Al2O6:Eu3+,Ho3+ (M = Ba, Mg) phosphors

“…In stoichiometric combinations of SrO-Al 2 O 3 , such as SrAl 2 O 4 , SrAl 4 O 7 , Sr 4 A l4 O 25 , Sr 3 Al 2 O 6 and SrAl 12 O 19 , the compounds were generally prepared by the solid-state reaction method which includes the mechanical mixing of high purity and small particle sized raw materials (SrCO 3 and Al 2 O 3 ), which is necessary to prevent compositional inhomogeneities [1][2][3][4].…”

Synthesis and luminescence properties of NaLa(MoO 4 ) 2− x AG x :Eu 3+ (AG = SO 4 2 − , BO 3 3 − ) red phosphors for white light emitting diodes

“…However, there are several drawbacks in the practical application of these blue+yellow type white LEDs, including poor color-rendering index which come from the deficiency of red emission [4,5]. There are alternative ways to generate warm white lights: one is combining an UV chip with red, green, and blue phosphors [6] and another is combining a blue chip with red and green phosphors [7], so red phosphor plays an important role in the formation of white LEDs.…”