Volume 101, Issue 11 p. 4983-4993
ORIGINAL ARTICLE

Formation mechanism and optimized luminescence of Mn4+-doped unequal dual-alkaline hexafluorosilicate Li0.5Na1.5SiF6

Mengmeng Zhu

Mengmeng Zhu

Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China

Search for more papers by this author
Yuexiao Pan

Corresponding Author

Yuexiao Pan

Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China

Correspondence

Yuexiao Pan, Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China.

Email: [email protected]

Search for more papers by this author
Xi'an Chen

Xi'an Chen

Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China

Search for more papers by this author
Hongzhou Lian

Hongzhou Lian

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China

Search for more papers by this author
Jun Lin

Jun Lin

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China

Search for more papers by this author
First published: 17 May 2018
Citations: 13

Abstract

A novel red phosphor Li0.5Na1.5SiF6:Mn4+ (LNSF:Mn) based on the unequal dual-alkaline hexafluorosilicate with superior optical performances has been synthesized via ion-exchange between [MnF6]2− and [SiF6]2− at room temperature. The composition and the crystal structure of the as-obtained phosphor LNSF:Mn were determined by energy-dispersive x-ray spectroscopy (EDS) and x-ray diffraction (XRD), respectively. The formation mechanism of the red phosphor LNSF:Mn has been discussed in detail. The phosphor LNSF:Mn exhibits good chromaticity properties and a quantum yield (QY) of 96.1%, which are better than the identified fluorosilicate phosphors Na2SiF6:Mn4+ (NSF:Mn) and K2SiF6:Mn4+ (KSF:Mn). A broad and intense absorption in the blue and a bright emission in red-shifted wavelengths make the phosphor LNSF:Mn a desired candidate for applications in warm white light-emitting diodes.