Synthesis and Luminescence Properties of Eu Doped High Temperature Form of BiMoO

This work reports on the luminescence properties of the Eu-doped high-temperature form of BiMoO by a solid-state reaction technique at high temperature. Various characterization methods including x-ray diffraction, scanning electron microscopic, Fourier transform infrared, and fluorescence spectroscopy measurements were utilized in order to investigate the phase purity and surface morphology as well as photoluminescence properties for as-prepared phosphors. The spectroscopic characteristics including excitation and emission spectrum, concentration quenching phenomenon, decay curves, and chromaticity coordinates are discussed in detail. The nature of the luminescence behavior of Eu was understood in term of the Judd–Ofelt theory, and the luminescent quantum efficiency of D → F transition of Eu was estimated. The as-prepared phosphors can be effectively excited with a 465-nm blue light, and exhibit a reddish-orange emission belonging to the prevailing D → F transition of Eu with a decay time of milliseconds. This indicates that the BiMoO:Eu phosphors could have potential application in white light-emitting diodes (w-LEDs) based on blue LED chips.