Abstract
Blue-emitting LaSi3N5:Ce3+ phosphors, with an orthorhombic structure and a P212121 symmetry, could be used for UV chip-based white light emitting diodes (WLED). However, the application of these phosphors to WLEDs has been restricted because of an unsatisfactory excitation efficiency in the wavelength range that is used by most WLED applications to pump phosphors. Al was introduced into LaSi3N5:Ce3+ to facilitate a single-phase synthesis and to red-shift the excitation band toward a desirable wavelength region. As a result, a single-phase LaSi3−3x/4AlxN5:Ce3+ (or LaSi3−xAlxN5−xOx:Ce3+) solid solution was obtained with the well-defined P212121 structure maintained. The red shift was attributed to the enhanced centroid shift and to a reduced Ce-N bond length caused by the Al inclusion.
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.
