Rapid synthesis of BaMoO₄:Eu³⁺ red phosphors using microwave irradiation

Abstract

This study synthesized BaMoO4:Eu 3+ red phosphors using the microwave method.In addition, the phase composition, morphology, and luminescence properties of the red phosphors were characterized using X-ray diffraction, field-scanning electron microscopy, and photoluminescence spectroscopy. The results revealed that doping red phosphors with different concentrations of Eu 3+ does not change the crystal structure of the matrix material. The BaMoO 4 :Eu 3+ phosphors exhibited micron-scale irregular polyhedra, which could be excited by ultraviolet light with a wavelength of 395 nm to induce red-light emission. The optimal dosage of Eu 3+ was 0.08, and the chromaticity coordinates of BaMoO 4 :0.08Eu 3+ phosphors were (0.5869, 0.3099).White light-emitting diode (w-LED) devices manufactured by using a combination of BaMoO 4 :0.08Eu 3+ phosphor and commercially available phosphors exhibited good white-light emission under the excitation of an ultraviolet chip. The BaMoO 4 :0.08Eu 3+ red phosphors that rapidly synthesized under the microwave field are expected to be used in w-LED devices.

A Novel Zero-Thermal-Quenching Red Phosphor with High Quantum Efficiency and Color Purity

“…For now, the commercial red phosphor is mainly Y 2 O 3 : Eu 3+ . However, due to its poor thermal stability [9] and invalidity to be excited by near-ultraviolet light [10], new red phosphors doped with Mn 4+ , Eu 3+ , Sm 3+ and Pr 3+ have been extensively explored, such as BaLaMgTaO 6 : Mn 4+ [11], BaMoO 4 : Eu 3+ [12], LiCaGd(WO 4 ) 3 : Eu 3+ [13], Ca 2 LiScB 4 O 10 : Sm 3+ [14], Ca 3 Y(AlO) 3 (BO 3 ) 4 : Sm 3+ [15], CsMgPO 4 : Sm 3+ [16], Sr 3 Ga 2 Sn 1.5 Si 2.5 O 14 : Sm 3+ [17], CaTiO 3 : Pr 3+ [18], NaCaTiNbO 6 : Pr 3+ [19].…”