Abstract
X-ray absorption and hard X-ray excited optical luminescence were used to probe the structural and optical properties of LiAl5O8 doped with different Eu concentrations produced by the modified sol-gel method. X-ray diffraction studies revealed that all samples produced have a cubic spinel unit cell of LiAl5O8 and that some impurities of the EuAlO3 phase were observed at concentration limits of 4 and 5 %. Based on the XAS results, they show the stabilization of europium in both the trivalent and bivalent states and reveal that Eu3+ ion can stabilize both in distorted octahedral configurations (non-centrosymmetric) and in the form of pentagonal bipyramid sites. The XEOL spectra were excited at Eu LIII-edge is composed of typical emission peaks attributed to the emission of Eu3+ ions and contaminating ions (Cr3+ and Fe3+). An XEOL luminescence mechanism was also discussed based on the XEOL emission spectra.
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.
