Abstract
A blue-emitting phosphor Ca12 Al14 O32 F2 :Eu2+ was synthesized using a high-temperature solid-state reaction under a reductive atmosphere. The X-ray diffraction measurements indicate that a pure phase Ca12 Al14 O32 F2 :Eu2+ can be obtained for low doping concentration of Eu2+ . The phosphor has a strong absorption in the range 270-420nm with a maximum at ~340nm and blue emission in the range 400-500nm with chromatic coordination of (0.152, 0.045). The optimal doping concentration is ~0.24. In addition, the luminescence properties of the as-synthesized phosphor were evaluated by comparison with those of Ca12 Al14 O32 Cl2 :Eu2+ and the commercially available phosphor BaMgAl10 O17 :Eu2+ . The emission intensity of Ca12 Al14 O32 F2 :Eu2+ was ~72% that of BaMgAl10 O17 :Eu2+ under excitation at λ=375nm. The results indicate that Ca12 Al14 O32 F2 :Eu2+ has potential application as a near-UV-convertible blue phosphor for white light-emitting diodes.
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 callMore From: Luminescence : the journal of biological and chemical luminescence
Disclaimer: 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.
