Abstract
The systems of Si-Al-O-N originated from the outstanding nitrogen ceramic of Si3N4 have received considerable attention due to their significant luminescence properties. In this work, to explore its potential in the full-spectrum lighting applications, a novel oxynitride based phosphor Lu4SiAlO8N: Ce3+ was investigated in detail by using the Rietveld refinement, DFT calculations, photoluminescent (PL) and time-resolved PL (TRPL) spectra. The results indicate that Lu4SiAlO8N performs a tight host lattice formed by the edge-sharing LuO6 polyhedrons and (Si, Al) (O, N)4 tetrahedrons; the multiple crystallographic Lu3+ sites in the host lattice contribute to the broad emission band. Under the near ultraviolet (NUV) light excitation, Lu4SiAlO8N: Ce3+ emits a bright cyan light peaked at 470 nm, and its full width at half maximum (FWHM) can reach 120 nm, which well replenishes the “cyan cavity”. Moreover, the energy transfer between the multiple luminescent centers was verified through the TRPL spectra. The temperature-dependent spectra of Lu4SiAlO8N: Ce3+ was measured to prove its acceptably thermal stability. All the results indicate the Lu4SiAlO8N: Ce3+ to be a promising candidate for the application in 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.
