Concentration Quenching in K2SiF6:Mn4+ Phosphors. (1st January 2018)

• Record Type: Journal Article
• Authors: Garcia-Santamaria, F.; Murphy, J. E.; Setlur, A. A.; Sista, S. P.
• Is Part Of: ECS journal of solid state science and technology. Volume 7:Number 1(2018)
• Page Start: R3030
• Page End: R3033
• Publication Date: 2018-01-01
• Subjects: LED -- Luminescence -- Phosphor; Solid state chemistry -- Periodicals; Electronics -- Materials -- Periodicals; Electrochemistry -- Periodicals; 541.0421
• DOI: 10.1149/2.0081801jss
• Languages: English
• ISSNs: 2162-8777

Abstract

Abstract : In this report, we discuss the effect of synthesis on the concentration quenching of K2 SiF6 :Mn 4+ phosphors. Comparing two different synthesis methods, we demonstrate that Mn concentration can be increased by a factor of three before the onset of concentration quenching. These effects are analyzed using literature models for concentration quenching that show that large reductions in defect concentrations are responsible for the improvements in concentration quenching along with a possible change in the mechanism behind concentration quenching. The practical implications for LED packages using high Mn 4+ concentration K2 SiF6 :Mn 4+ phosphor with high quantum efficiencies are also discussed along with suggestions about pitfalls in the analysis of concentration quenching.