Abstract
A series of novel double-perovskite type red emitting phosphors, Ba2Gd1-xTaO6:xEu3+ were synthesized via solid-state reaction route. Powder X-ray diffraction results confirmed the cubic perovskite phase and scanning electron microscope was used to evaluate the morphology of the phosphors, respectively. Detailed studies on UV–vis absorption showed that Eu3+ doped Ba2GdTaO6 phosphors have obvious absorption in the ultraviolet region. The excitation of UV (CTB), near UV (394 nm) and blue light (467 nm) match the output wavelength of ultraviolet and blue LED chips, and red-light emission is observed, which is mainly due to the magnetic dipole (5D0→7F1) and electric dipole transition of (5D0→7F2) of Eu3+. The results show that the energy transfer from Gd3+ to Eu3+ enhances the luminescence. Concentration quenching was observed when Eu3+ doped at more than 10 mol%. Thermal quenching was measured and the activation energy was 0.230 eV. The prepared phosphors have potential applications in WLEDs.
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.
