Effect of Ba Co-Doping on Sr5(PO4)3Cl:Ce3+ Blue Emitting Phosphor Application for White Light Emitting Diodes. (25th April 2016)

• Record Type: Journal Article
• Authors: Deressa, Gemechu
• Is Part Of: ECS transactions. Volume 72:Number 5(2016)
• Page Start: 97
• Page End: 108
• Publication Date: 2016-04-25
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/07205.0097ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : Ce 3+ -activated Sr5-2x-y Bay (PO4 )3 Cl:xCe 3+, xNa + phosphors were synthesized via the solid statereaction methods. The substitution of Ba 2+ for Sr 2+ ions was confirmed by Raman spectra. The broadest Raman width in Sr2.45 Ba2.45 (PO4 )3 Cl:Ce 3+ phosphor supported its highest disorder of the host lattice, leading to the emission spectral broadening with a half width of 95.5 nm due to the larger variation in crystal filed strength. The thermal stability of the luminescence was evaluated by the temperature-dependent luminescence intensity. The simulating a spectra of blue-emitting Sr2.45 Ba2.45 (PO4)3 Cl:0.05Ce 3+, 0.05Na + and orange emitting Sr3 SiO5 :Eu 2+ phosphors as light converters, an intense white GaN-based near-UV-LED (400 nm) was exhibit good color-rendering index Ra of 90.8 at a correlated color temperature of 6473 K and CIE coordinates of (0.3165, 0.3051). These characteristics makes Sr2.45 Ba2.45 (PO4 )3 Cl: 0.05Ce 3+, 0.05Na + should be a promising blue-emitting phosphors for the production of white light in phosphor conversion white-LEDs.