Abstract
In order to improve the properties of white light-emitting diodes (WLEDs), a number of phosphors have been investigated. In this study, a variety of SLGO phosphors doped with Bi3+/Eu3+, Bi3+/Tb3+, and Bi3+/Eu3+/Tb3+ ions were synthesized by the solid-state reaction method. The crystal structure, site occupancy of the SLGO host, and the phase composition of the synthesized phosphors were discussed. The optical properties of the synthesized phosphors were characterized by UV–vis, PLE and PL techniques. The relative PL mechanisms and energy transfer (ET) processes (Bi3+→Eu3+, Bi3+→Tb3+ and Tb3+→Eu3+) were discussed in detail. In addition, the CIE chromaticity coordinates of these phosphors were calculated. Tunable PL has been achieved througth adjusting the concentrations of three doping ions and ET process. The ET process was verified by the fluorescence lifetime test. The thermal stability of the phosphor was also studied and discussed. Finally, a WLED device was fabricated by combining the SLGO:Bi3+/Tb3+/Eu3+ phosphor with a 275 nm LED chip, and the electroluminescence was measured. The values of CCT and CRI were 5263 K and 78, respectively. The results demonstrate that the synthesized phopshors have potential applications in the field of WLEDs.
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.
