Color tuning in CaM(PO):Eu (M = Sr, Ba) phosphors cation substitution
A series of Ca 3− x M x (PO 4 ) 2 :Eu 2+ (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 Eu 2+ into Ca 3− x M x (PO 4 ) 2 :Eu 2+ (M = Sr, Ba). Upon excitation at 365 nm,...
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Published in | Dalton transactions : an international journal of inorganic chemistry Vol. 49; no. 26; pp. 8949 - 8958 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
07.07.2020
|
Online Access | Get full text |
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Summary: | A series of Ca
3−
x
M
x
(PO
4
)
2
:Eu
2+
(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 Eu
2+
into Ca
3−
x
M
x
(PO
4
)
2
:Eu
2+
(M = Sr, Ba). Upon excitation at 365 nm, the Ca
3
(PO
4
)
2
:Eu
2+
phosphors exhibit a relatively narrow-band blue emission peaking at 415 nm attributed to the electric radiation transitions 4f
6
5d
1
→ 4f
7
of Eu
2+
. Moreover, the structural phase transformation and the unusual emission color variation of Ca
3−
x
M
x
(PO
4
)
2
:Eu
2+
(M = Sr, Ba) phosphors
via
the replacement of cationic M
2+
(Sr
2+
, Ba
2+
) were reported. Upon excitation at the same wavelength of 365 nm, the emission peaks of Eu
2+
-doped Ca
3−
x
Sr
x
(PO4)
2
phosphors red-shifted from 411 to 524 nm with increasing Sr/Ca ratio. The emission thermal stability of M
3
(PO
4
)
2
:Eu
2+
(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.
A series of Ca
3−
x
M
x
(PO
4
)
2
:Eu
2+
(M = Sr, Ba) phosphors were prepared
via
a high-temperature solid-state reaction process. |
---|---|
ISSN: | 1477-9226 1477-9234 |
DOI: | 10.1039/d0dt01130d |