Jump to main content
Jump to site search

Issue 29, 2019
Previous Article Next Article

Red-emitting phosphors APF6:Mn4+ (A = Cs+, Rb+, K+): synthesis, luminescence properties and application in solid-state lighting

Author affiliations

Abstract

A series of APF6:Mn4+ (A = Cs+, Rb+, K+) phosphors with single phases were obtained via a simple ion exchange method. These phosphors can exhibit red emission with a broad excitation band in the blue region. The optimized concentration of Mn4+ in APF6:Mn4+ was determined. The Racah parameters B and C of Mn4+ in APF6:Mn4+ were also calculated. The results indicate that Mn4+ in CsPF6:Mn4+ experiences the weakest crystal field among APF6:Mn4+. The phosphor CsPF6:Mn4+ prepared with the HPF6/K2MnF6 molar ratio of 10 : 1 has the strongest red emission and the highest external quantum efficiency of 50.4% among the samples. It has high thermal quenching resistance and its emission intensity at 160 °C is about 1.1 times higher than that at room temperature. This sample also can remarkably improve the color rendering index and decrease the colour rendering index of white light-emitting diodes (w-LEDs). Hence, CsPF6:Mn4+ could be used as a red-emitting phosphor for warm w-LEDs.

Graphical abstract: Red-emitting phosphors APF6:Mn4+ (A = Cs+, Rb+, K+): synthesis, luminescence properties and application in solid-state lighting

Back to tab navigation

Supplementary files

Publication details

The article was received on 10 Apr 2019, accepted on 03 May 2019 and first published on 03 May 2019


Article type: Paper
DOI: 10.1039/C9DT01532A
Dalton Trans., 2019,48, 10901-10906

  •   Request permissions

    Red-emitting phosphors APF6:Mn4+ (A = Cs+, Rb+, K+): synthesis, luminescence properties and application in solid-state lighting

    Y. Chen, Z. Yang, Q. Wang, M. Rong, Q. Zhou and Z. Wang, Dalton Trans., 2019, 48, 10901
    DOI: 10.1039/C9DT01532A

Search articles by author

Spotlight

Advertisements