Luminescent Color-Adjustable Europium and Terbium Co-Doped Strontium Molybdate Phosphors Synthesized at Room Temperature Applied to Flexible Composite for LED Filter

Abstract

In this study, terbium and europium rare-earth ions were single-doped and co-doped to synthesized SoMoO4 phosphor at room temperature. The samples prepared synthesized crystalline SrMoO4 powder by the co-precipitation. Samples had a tetragonal structure in XRD analysis and d(112) spacing was changed by rare-earth doping. As the amount of rare earth added increased, a secondary phase appeared, and the structure changed. The synthesized SrMoO4:Tb3+ phosphors showed a green light emission at 544 nm under 287 nm, SrMoO4:Eu3+ phosphors showed a red light emission at 613 nm under 290 nm, and SrMoO4:[Eu3+]/[Tb3+] phosphor showed a yellow-white light emission at 544 and 613 nm when excited at 287 nm. The synthesized phosphor exhibited a change in green and red luminescence intensity based on the amount of Eu3+ doped and showed strong red luminescence as the Eu3+ doping increased. To use the SrMoO4:[Eu3+]/[Tb3+] phosphor with these characteristics in an LED color filter, a flexible composite prepared by mixing with PDMS showed green, red, and yellow-white emission under a UV-lamp.

An SPS-RS Technique for the Fabrication of SrMoO4 Powellite Mineral-like Ceramics for 90Sr Immobilization

“…One of the best examples of these is the molybdate of a powellite structure that naturally occurs as CaMoO 4 , adopting a scheelite-type tetragonal phase (space group I 4 1/a, Z = 4). Molybdates are of particular interest due to their outstanding luminescence properties, which are applied in gas detectors [8,9], optical devices [10][11][12][13][14][15], and scintillation detectors [16][17][18][19]. Different synthesis and processing techniques lead to changes in structural properties, which affect the material properties and comprise a motivating factor in the investigation of the formation of SrMoO 4 .…”

“…Several techniques are used to synthesize SrMoO 4 , including the Czochralski method [13], coprecipitation [7,18], traditional solid-phase reactions [12,23], sol-gel synthesis [9], hydrothermal synthesis [17], and microwave hydrothermal synthesis [15,16].…”

Room Temperature Synthesis of Various Color Emission Rare-Earth Doped Strontium Tungstate Phosphors Applicable to Fingerprint Identification

“…It has been reported that the emission wavelength of phosphors used in various types of light devices can vary depending on the type and concentration of the doped rare earth ions, the sintering temperature, crystal grain size, excitation wavelength, and synthesis conditions [10][11][12][13]. In particular, the main emission wavelength of the rare earth ions is determined by competition between electric dipole transitions and magnetic dipole transitions.…”

Room temperature synthesis of highly luminescent Eu3+ and Tb3+-doped hexagonal-phase YPO4 nanoparticles with tunable emission

“…9,10 Thus, various lanthanide-doped luminescent nanoparticles are reported in the literature. Most common hosts that have been used for preparing such nanoparticles are NaBi(MoO 4 ) 2 , 11 SrWO 4 , 12 BaMoO 4 , 13 BaWO 4 , 14 CaMoO 4 , 15 SrMoO 4 , 16 Ca 3 Bi(PO 4 ) 3 , 17 CaAl 2-Si 2 O 8 , 18 La(PO 4 ) 19 and YPO 4 . [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] Out of these hosts, yttria (YPO 4 ) has been widely used as it is isostructural to the lanthanide phosphates (LnPO 4 ).…”

“…9,10 Thus, various lanthanide-doped luminescent nanoparticles are reported in the literature. 11–31 Most common hosts that have been used for preparing such nanoparticles are NaBi(MoO 4 ) 2 , 11 SrWO 4 , 12 BaMoO 4 , 13 BaWO 4 , 14 CaMoO 4 , 15 SrMoO 4 , 16 Ca 3 Bi(PO 4 ) 3 , 17 CaAl 2 Si 2 O 8 , 18 La(PO 4 ) 19 and YPO 4 . 20–34…”