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Issue 26, 2020
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Color tuning in Ca3−xMx(PO4)2:Eu2+ (M = Sr, Ba) phosphors via cation substitution

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Abstract

A series of Ca3−xMx(PO4)2:Eu2+ (M = Sr, Ba) phosphors were prepared via a high-temperature solid-state reaction process. The X-ray diffraction and Rietveld refinements were used to verify the incorporations of Eu2+ into Ca3−xMx(PO4)2:Eu2+ (M = Sr, Ba). Upon excitation at 365 nm, the Ca3(PO4)2:Eu2+ phosphors exhibit a relatively narrow-band blue emission peaking at 415 nm attributed to the electric radiation transitions 4f65d1 → 4f7 of Eu2+. Moreover, the structural phase transformation and the unusual emission color variation of Ca3−xMx(PO4)2:Eu2+ (M = Sr, Ba) phosphors via the replacement of cationic M2+ (Sr2+, Ba2+) were reported. Upon excitation at the same wavelength of 365 nm, the emission peaks of Eu2+-doped Ca3−xSrx(PO4)2 phosphors red-shifted from 411 to 524 nm with increasing Sr/Ca ratio. The emission thermal stability of M3(PO4)2:Eu2+ (M = Ca, Sr, Ba) was comparatively characterized and the difference was related to the specific host structural features. The combination of host composition design may provide a novel strategy to obtain white light and tunable luminescence.

Graphical abstract: Color tuning in Ca3−xMx(PO4)2:Eu2+ (M = Sr, Ba) phosphors via cation substitution

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Article information


Submitted
25 Mar 2020
Accepted
05 May 2020
First published
05 May 2020

Dalton Trans., 2020,49, 8949-8958
Article type
Paper

Color tuning in Ca3−xMx(PO4)2:Eu2+ (M = Sr, Ba) phosphors via cation substitution

H. Zhang, D. Yuan, X. Mi, X. Liu and J. Lin, Dalton Trans., 2020, 49, 8949
DOI: 10.1039/D0DT01130D

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