Novel blue‐emitting SrMg₂Al₁₆O₂₇:Eu²⁺ phosphor for solid‐state lighting

Abstract

Eu(2+)-activated SrMg(2)Al(16)O(27) novel phosphor was synthesized by a combustion method (550°C furnace). The prepared phosphor was first characterized by X-ray diffraction (XRD) for confirmation of phase purity. SEM analysis showed the morphology of the phosphor. The photoluminescence characteristics showed broad-band excitation at 324 nm, which was monitored at 465 nm emission wavelength. The SrMg(2)Al(16)O(27):Eu(2+) phosphor shows broad blue emission centred at 465 nm, emitting a blue light corresponding to 4f(6) 5d(1) → 4f(7) transition. Here we report the photoluminescence characteristics of the prepared phosphor and compare it with commercial BAM:Eu(2+) phosphor.

Photoluminescence properties and energy transfer in Ce3+/Dy3+ co‐doped Sr3MgSi2O8 phosphors for potential application in ultraviolet white light‐emitting diodes

“…The emission spectrum covers the region from 450 to 700 nm consisting of the characteristic transitions of Dy 3+ , namely, 4 F 9/2 ! With an increase in Dy 3+ content, the emission intensity of the Dy 3+ ions increases and then decreases as the doping 10 20 concentration becomes higher than 0.05. 6 H 15/2 (490 nm), 4 F 9/2 !…”

“…For excitation of 338 nm, the emission spectra of Sr 2.99-y MgSi 2 O 8 :0.01Ce 3+ , yDy 3+ (y = 0-0.09) show not only as a band of Ce 3+ ions but also as a band of Dy 3+ ions. With an increase in Dy 3+ content, the emission intensity of the Dy 3+ ions increases and then decreases as the doping 10 20 concentration becomes higher than 0.05. However, as the emission intensity of the Ce 3+ ions decreases monotonically from y = 0 to 0.09, the results demonstrate energy transfer from Ce 3+ to Dy 3+ .…”

“…To overcome these disadvantages, a new class of phosphors, especially those that can be effectively excited by ultraviolet (UV) or blue light and can emit strong blue, green, yellow or red light, are being developed (7)(8)(9). For example, blue light is easily absorbed by green or red phosphors, resulting in lowered external quantum luminous efficiency of the resulting w-LEDs (10). For example, blue light is easily absorbed by green or red phosphors, resulting in lowered external quantum luminous efficiency of the resulting w-LEDs (10).…”

“…However, these have shortcomings due to the property differences of tricolor phosphors. For example, blue light is easily absorbed by green or red phosphors, resulting in lowered external quantum luminous efficiency of the resulting w-LEDs (10). Therefore, the approach of using single-host phosphors excited by UV to obtain white light has led to a great deal of interest among researchers.…”

Optical properties of blue emitting Ce3+ activated XMg2Al16O27 (X = Ba, Sr) phosphors

“…Oxide phosphors have been found to be suitable for field emission display (FED), vacuum fluorescent display (VFD), electroluminescent (EL) devices, and plasma panel display (PDP) devices [8][9][10][11]. D. Ravichandran [12,13]. The commercially available W-LEDs based on phosphors have been produced since 1996, which combine a blue light-emitting GaN chip with a yellow phosphor YAG:Ce 3+ .…”