Abstract
Cerium-doped lanthanum strontium aluminum oxide LaSr2AlO5:Ce3+ has recently been identified by us as a viable yellow phosphor that in conjunction with a blue-emitting diode can be used in solid-state white lighting sources. In this study, we present the energy level structure relevant to the luminescence process within LaSr2AlO5:Ce3+, based on crystal structure determination by powder X-ray diffraction and the peak deconvolution of excitation and emission spectra. We also establish the versatility of the phosphor host LaSr2AlO5 by examining isovalent substitutions of all three cation types in the structure; Gd or Tb for La, Ca or Ba for Sr, and B or Ga for Al. All the above cation substitutions/solid solution are achieved to the full extent except when Ca (for Sr) or B (for Al) are chosen as substituent. Optical properties of the prepared Ce3+ phosphors are found to depend on the rare-earth metal−oxygen distances and the lattice ionicity. Among the compounds studied here, excitation maxima range between 4...
Sign-in/Register to access full text options 
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.
