Abstract
Eu 2+ -doped BaAl 2 Si 2 O 8 blue phosphor was prepared by the one-step calcination process of the chemical coprecipitation method. The phase structure, luminescence properties and morphologies of the samples were investigated by X-ray powder diffraction, fluorescence spectrophotometer and scanning electron microscopy, respectively. A tiny amount of BaAl 2 O 4 phase was detected after adding polyethylene glycol (PEG) in precursor solution. The emission intensity increased with increasing PEG concentration at the beginning, and then decreased owing to the adverse enhancement of impurity phase and concentration quenching of Eu 2+ ions resulted from addition of PEG. The emission peak position of the sample with 4 wt% PEG has a blue-shift compared with the other concentrations, which is attributed to Eu 2+ emission mainly influenced by the Nephelanxetic effect. The morphology of particles changed from platelet or block to subglobular with increasing PEG concentration because PEG changed a nucleation process of crystal and gave rise to steric hindrance effect.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
