Emanating cool white light emission from novel down-converted SrLaAlO4:Dy3+ nanophosphors for advanced optoelectronic applications

Structural characterization and luminescence properties of Dy3+ doped Ca3MgSi2O8 phosphors

A series of single phase white light emitting CaSrAl2SiO7:Dy3+ phosphors were prepared by traditional high temperature solid state reaction method. Structural characterization was done by X-ray diffraction, field emission scanning electron microscopy and energy dispersive spectroscopy analyses. Optical characterization was performed from photoluminescence and thermoluminescence studies. When excited at 350 nm, CaSrAl2SiO7:Dy3+ phosphors showed two intense emission bands in the blue region (480 nm and 493 nm) corresponding to 4F9/2 → 6H15/2 transition and one in yellow region (576 nm) corresponding to 4F9/2 → 6H13/2 transition. The Commission Internationale de I’Eclairage diagram was drawn for entire series. It confirmed that by manipulating Dy3+ content the luminescence color of CaSrAl2SiO7:Dy3+ phosphors were tuned from blue to white region. Computation of correlated color temperature suggested that present phosphor was cool in appearance hence CaSrAl2SiO7:Dy3+ phosphor can serve as a white light emitting phosphor and may be useful in outdoor illumination. A detailed study on thermoluminescence of ultraviolet exposed samples was done and possible mechanism of thermoluminescence was discussed. TL emission spectrum was also measured.

Cool white light emission from Dy3+ activated alkaline alumino silicate phosphors.

Shweta Sharma

Papers

Structural characterization and luminescence properties of Dy3+ doped Ca3MgSi2O8 phosphors

Cool white light emission from Dy3+ activated alkaline alumino silicate phosphors.

Studies on thermoluminescence properties of alkaline earth silicate phosphors

Influence of Dy3+ concentration on spectroscopic behaviour of Sr3MgSi2O8:Dy3+ phosphors

Luminescence properties of near-UV excitable yellow-orange light emitting warm CaSrAl2SiO7:Sm3+ phosphors