Inhomogenous Broadening, Charge Compensation, and Luminescence Quenching in Ce3+-Doped Sr3AlO4F Phosphors. (24th September 2015)

• Record Type: Journal Article
• Authors: Setlur, A. A.; Porob, D. G.; Happek, U.; Brik, M. G.
• Is Part Of: ECS journal of solid state science and technology. Volume 5:Number 1(2016)
• Page Start: R3089
• Page End: R3095
• Publication Date: 2015-09-24
• Subjects: Ce3+ -- Energy transfer -- Luminescence -- Phosphor; Solid state chemistry -- Periodicals; Electronics -- Materials -- Periodicals; Electrochemistry -- Periodicals; 541.0421
• DOI: 10.1149/2.0111601jss
• Languages: English
• ISSNs: 2162-8777

Abstract

Abstract : The local coordination around luminescent ions in phosphors can affect the properties of these materials. In this report, we analyze the Ce 3+ luminescence for the various Ce 3+ centers in Sr3 AlO4 F-based phosphors and use the excitation, emission, and quenching of these phosphors to infer aspects of the local coordination. It is shown that Ce 3+ centers with lower energy 4f 1 →5d 1 absorption bands are likely from charge compensation effects by the replacement of F − by O 2− . In addition, at higher RE 3+ concentrations, additional Ce 3+ centers with even lower energy 4f 1 →5d 1 absorption bands are present, presumably due to Ce 3+ -RE 3+ pair formation and O 2− charge compensation. These Ce 3+ centers with lower energy 4f 1 →5d 1 absorption bands have their luminescence strongly quenched at room temperature. The relationships between composition and Ce 3+ luminescence quenching for Sr3 AlO4 F-based phosphors are also discussed, giving evidence that Ce 3+ (5d 1 ) ionization is the main cause for luminescence quenching in these materials.