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Issue 23, 2016
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Luminescence behaviour of Mn4+ ions in seven coordination environments of K3ZrF7

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Abstract

A single-phased Mn4+ doped fluorozirconate red phosphor, K3ZrF7:Mn4+, has been successfully synthesized. Its structure, morphology, composition and optical properties were investigated by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, atomic absorption spectroscopy, diffuse reflectance spectroscopy, photoluminescence spectroscopy and by using luminescence decay curves. It was found that Mn4+ ions only coordinating with seven F− anions in a K3ZrF7 crystal field can possess intense red emission under blue light illumination. Mixing the obtained K3ZrF7:Mn4+ red phosphor with commercial Y3Al5O12:Ce3+ and coating the mixture on a blue-GaN chip, obvious warm white light with a low correlated color temperature (2970 K) and a high color rendering index (Ra = 91.4 and R9 = 72) were achieved from white light-emitting diode devices.

Graphical abstract: Luminescence behaviour of Mn4+ ions in seven coordination environments of K3ZrF7

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Article information


Submitted
29 Apr 2016
Accepted
11 May 2016
First published
12 May 2016

Dalton Trans., 2016,45, 9654-9660
Article type
Paper

Luminescence behaviour of Mn4+ ions in seven coordination environments of K3ZrF7

H. Tan, M. Rong, Y. Zhou, Z. Yang, Z. Wang, Q. Zhang, Q. Wang and Q. Zhou, Dalton Trans., 2016, 45, 9654
DOI: 10.1039/C6DT01693F

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