White-light long-lasting phosphor Sr2MgSi2O7:Dy3+

Synthesis of Sr2MgSi2O7:Eu, Dy and Sr2MgSi2O7:Eu, Dy, Nd by a modified solid-state reaction and their luminescent properties

“…In addition, many researchers synthesized rare earth ions doped Sr 2 MgSi 2 O 7 phosphors by high temperature solid-state reaction and in a weak reductive atmosphere [8,9]. The method has been used intensively for phosphor synthesis, but this process often results in poor homogeneity and requires high calcinations temperature.…”

Structural characterization and optical properties of dysprosium doped strontium calcium magnesium di-silicate phosphor by solid state reaction method

“…[2][3] Luminescence materials doped with Dy 3+ have recently drawn considerable interest because it emits white light. Given that Dy 3+ with 4f 9 configuration has complicated f-block energy levels, various possible transitions between these levels are highly selective and show sharp line spectra. [4][5] In general, Dy 3+ exhibits three visible emission bands including the blue emission at 480 nm corresponding to the 4 F 9/2 → 6 H 15/2 transition, the yellow emission at 577 nm corresponding to the hypersensitive transition 4 F 9/2 → 6 H 13/2 (∆ J= 2) and the feeble red emission at 670 nm corresponding to the transition 4 F 9/2 → 6 H 11/2 .…”

“…[4][5] In general, Dy 3+ exhibits three visible emission bands including the blue emission at 480 nm corresponding to the 4 F 9/2 → 6 H 15/2 transition, the yellow emission at 577 nm corresponding to the hypersensitive transition 4 F 9/2 → 6 H 13/2 (∆ J= 2) and the feeble red emission at 670 nm corresponding to the transition 4 F 9/2 → 6 H 11/2 . [6][7][8][9] Consequently, white light can be obtained by creating the appropriate mixture of blue and yellow emissions.…”

Dy3+ emission in M5(PO4)3F (M = Ca, Ba) phosphor

“…A white light LED consists of a UV or near-UV LED chip and blue/yellow or blue/green/red phosphors. Dy 3+ doped phosphor, Sr 2 MgSi 2 O 7 [2], Sr 3 Gd(PO 4 ) 3 , Ba 3 Gd 4 (PO 4 ) 3 [3] useful for white light lightening. A white light LED that combines a blue LED and a (Y 1-a Gd a ) 3 (Al 1-b Ga b ) 5 O 12 :Ce (YAG) phosphor was made available on the market in 1996.…”