Abstract
New interesting α-SiAlON:Eu-based yellow oxynitride phosphors with the formula (CaxEuy)Si12-2x-3yAl2x+3yOyN16-y (x = 0.2−2.2, y = 0−0.25) have been prepared, and the effects of the activator concentration and the overall composition of the host lattice on optical properties have been investigated. It has been demonstrated that the Eu2+-doped α-SiAlON phosphors absorb strongly in the UV−visible part of the electromagnetic spectrum and exhibit an intense emission band with peaks at 583−605 nm. We have shown that the optical properties depend greatly on the Eu2+ concentration and the overall composition of the host lattice. The results indicate a concentration quenching effect at y ≥ 0.075 and a systematic red-shift in emission wavelength as the Ca2+ or the Eu2+ concentration increases.
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.
