Characterization and photoluminescence properties of sol-gel derived Bi₂MoO₆:Eu³⁺ phosphor

Abstract

This work first reported the characterization and photoluminescence properties of Eu³⁺ doped Bi₂MoO₆ phosphor prepared by sol-gel method. The phosphor was characterized by X-ray diffraction, field emission scanning electron microscopic, fourier transform infrared spectrum, and fluorescence spectroscopy measurements in order to investigate the phase purity, surface morphology, and photoluminescence properties. The spectroscopic characteristics including excitation and emission spectrum, decay curve, and chromaticity coordinates were discussed. The as-prepared phosphor can be effectively excited with 345/465 nm light, and exhibit red emission belonging to the prevailing ⁵ D ₀ → ⁷ F ₂ transition of Eu³⁺ with decay time of milliseconds. The above spectral characteristics indicate sol-gel derived Bi₂MoO₆:Eu³⁺ phosphor could be regarded as a potential red phosphor for application in white light-emitting diodes (w-LEDs) based on ultraviolet (UV)/blue LED chips.