Co-precipitation synthesis and photoluminescence properties of Ba1−xMoO4:xEu3+ red phosphors

Ba1−xMoO4:xEu3+ red phosphors were synthesized by the co-precipitation method with NH4HCO3–NH3·H2O system as the precipitating agent. X-ray diffraction (XRD), scanning electron microscope (SEM) and photoluminescence spectra were used to characterize the structures and luminescent properties of the phosphors. The results showed that introduction of Eu did not change the crystal structure and morphology of BaMoO4:Eu3+ phosphors. In addition, the influence of different contents of dopant Eu3+ for the luminescent properties of red phosphors Ba1−xMoO4:xEu3+ was analyzed. Photoluminescence spectra showed a red emission around 612 nm with 395 and 465 nm excitations, which matches the output wavelength of ultraviolet and blue LED chips. The optimal doping concentration of the red phosphors Ba1−xMoO4:xEu3+ was 30 mol%. - Highlights: ► Ba1−xEuxMoO4 red phosphors are synthesized by the co-precipitation method. ► The obtained powders are identified by X-ray diffraction and photoluminescence spectroscopies. ► Spectroscopic study of Eu3+ ions was made at room temperature and discussed the optimal doping concentration. ► These are new and interesting and were not reported in the previous papers.