Abstract
Using urea as fuel and boric as flux, a novel bluish green emitting phosphor Li 2(Ba 0.99,Eu 0.01)SiO 4:B 3+ has been successfully synthesized using a combustion method. The material has potential application as the fluorescent material for ultraviolet light-emitting diodes (UV-LEDs). The dependence of the properties of Li 2(Ba 0.99,Eu 0.01)SiO 4:B 3+ phosphors upon urea concentration, boric acid doping and initiating combustion temperature were investigated. The crystallization and particle sizes of Li 2(Ba 0.99,Eu 0.01)SiO 4:B 3+ have been investigated by using powder X-ray diffraction (XRD) and transmission electron microscopy (TEM). Luminescence measurements showed that the phosphors can be efficiently excited by ultraviolet (UV) to visible region, emitting a bluish green light with peak wavelength of 490 nm. The results showed that the boric acid was effective in improving the luminescence intensity of Li 2(Ba 0.99,Eu 0.01)SiO 4 and the optimum molar ratio of boric acid to barium nitrate was about 0.06. The optimized phosphors Li 2(Ba 0.99,Eu 0.01)SiO 4:B 0.06 3+ showed 160% improved emission intensity compared with that of the Li 2(Ba 0.99,Eu 0.01)SiO 4 phosphors under UV ( λ ex=350 nm) excitation.
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.
