Effects of encaged anions on the optical and EPR spectroscopies of RE doped C12A7

Y. X. Liu; L. Ma; D. T. Yan; H. C. Zhu; X. L. Liu; H. Y. Bian; H. Zhang; X. J. Wang

doi:10.1016/j.jlumin.2013.10.066

Effects of encaged anions on the optical and EPR spectroscopies of RE doped C12A7

Y. X. Liu, L. Ma, D. T. Yan, H. C. Zhu, X. L. Liu, H. Y. Bian, H. Zhang, X. J. Wang

Biochemistry, Chemistry, & Physics

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

Rare earth doped 12CaO·7Al₂O₃ (C12A7:RE with RE=Gd³⁺, Er³⁺, Ce³⁺, Tb³⁺, Eu ³⁺, Eu²⁺) phosphors have been prepared and treated under different conditions to trap different anions in the nanocages of C12A7. The effects of the encaged anions on the optical spectroscopies of the RE doped C12A7 phosphors, including photoluminescence and color tuning, upconverted emissions, and cathodoluminescence, have been investigated. Electron paramagnetic resonance spectra are also studied in combination with the optical spectra. Crystal field modification of RE emission centers by the encaged anions is observed by both photoluminescence and electron paramagnetic resonance. A relationship between the ratio of green to red upconverted emissions of Er ³⁺ and the amount of encaged OH^- anions is established and the concentration of the OH^- determined. Emission enhancement in C12A7:Ce³⁺,Tb³⁺ conductive phosphors is realized by a multiphase strategy, which has a potential application in field emission devices. Color tuning of C12A7:Eu³⁺/Eu²⁺ phosphor is also performed in the range from red to blue by controlling the sort and amount of encaged anions.

Original language	English
Pages (from-to)	28-32
Number of pages	5
Journal	Journal of Luminescence
Volume	152
DOIs	https://doi.org/10.1016/j.jlumin.2013.10.066
State	Published - Aug 2014

Keywords

C12A7
Calcium aluminum oxide
EPR
Encaged anions
Nanocages
Phosphors

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10.1016/j.jlumin.2013.10.066

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title = "Effects of encaged anions on the optical and EPR spectroscopies of RE doped C12A7",

abstract = "Rare earth doped 12CaO·7Al2O3 (C12A7:RE with RE=Gd3+, Er3+, Ce3+, Tb3+, Eu 3+, Eu2+) phosphors have been prepared and treated under different conditions to trap different anions in the nanocages of C12A7. The effects of the encaged anions on the optical spectroscopies of the RE doped C12A7 phosphors, including photoluminescence and color tuning, upconverted emissions, and cathodoluminescence, have been investigated. Electron paramagnetic resonance spectra are also studied in combination with the optical spectra. Crystal field modification of RE emission centers by the encaged anions is observed by both photoluminescence and electron paramagnetic resonance. A relationship between the ratio of green to red upconverted emissions of Er 3+ and the amount of encaged OH- anions is established and the concentration of the OH- determined. Emission enhancement in C12A7:Ce3+,Tb3+ conductive phosphors is realized by a multiphase strategy, which has a potential application in field emission devices. Color tuning of C12A7:Eu3+/Eu2+ phosphor is also performed in the range from red to blue by controlling the sort and amount of encaged anions.",

keywords = "C12A7, Calcium aluminum oxide, EPR, Encaged anions, Nanocages, Phosphors",

author = "Liu, {Y. X.} and L. Ma and Yan, {D. T.} and Zhu, {H. C.} and Liu, {X. L.} and Bian, {H. Y.} and H. Zhang and Wang, {X. J.}",

year = "2014",

month = aug,

doi = "10.1016/j.jlumin.2013.10.066",

language = "English",

volume = "152",

pages = "28--32",

journal = "Journal of Luminescence",

issn = "0022-2313",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Effects of encaged anions on the optical and EPR spectroscopies of RE doped C12A7

AU - Liu, Y. X.

AU - Ma, L.

AU - Yan, D. T.

AU - Zhu, H. C.

AU - Liu, X. L.

AU - Bian, H. Y.

AU - Zhang, H.

AU - Wang, X. J.

PY - 2014/8

Y1 - 2014/8

N2 - Rare earth doped 12CaO·7Al2O3 (C12A7:RE with RE=Gd3+, Er3+, Ce3+, Tb3+, Eu 3+, Eu2+) phosphors have been prepared and treated under different conditions to trap different anions in the nanocages of C12A7. The effects of the encaged anions on the optical spectroscopies of the RE doped C12A7 phosphors, including photoluminescence and color tuning, upconverted emissions, and cathodoluminescence, have been investigated. Electron paramagnetic resonance spectra are also studied in combination with the optical spectra. Crystal field modification of RE emission centers by the encaged anions is observed by both photoluminescence and electron paramagnetic resonance. A relationship between the ratio of green to red upconverted emissions of Er 3+ and the amount of encaged OH- anions is established and the concentration of the OH- determined. Emission enhancement in C12A7:Ce3+,Tb3+ conductive phosphors is realized by a multiphase strategy, which has a potential application in field emission devices. Color tuning of C12A7:Eu3+/Eu2+ phosphor is also performed in the range from red to blue by controlling the sort and amount of encaged anions.

AB - Rare earth doped 12CaO·7Al2O3 (C12A7:RE with RE=Gd3+, Er3+, Ce3+, Tb3+, Eu 3+, Eu2+) phosphors have been prepared and treated under different conditions to trap different anions in the nanocages of C12A7. The effects of the encaged anions on the optical spectroscopies of the RE doped C12A7 phosphors, including photoluminescence and color tuning, upconverted emissions, and cathodoluminescence, have been investigated. Electron paramagnetic resonance spectra are also studied in combination with the optical spectra. Crystal field modification of RE emission centers by the encaged anions is observed by both photoluminescence and electron paramagnetic resonance. A relationship between the ratio of green to red upconverted emissions of Er 3+ and the amount of encaged OH- anions is established and the concentration of the OH- determined. Emission enhancement in C12A7:Ce3+,Tb3+ conductive phosphors is realized by a multiphase strategy, which has a potential application in field emission devices. Color tuning of C12A7:Eu3+/Eu2+ phosphor is also performed in the range from red to blue by controlling the sort and amount of encaged anions.

KW - C12A7

KW - Calcium aluminum oxide

KW - EPR

KW - Encaged anions

KW - Nanocages

KW - Phosphors

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U2 - 10.1016/j.jlumin.2013.10.066

DO - 10.1016/j.jlumin.2013.10.066

M3 - Article

SN - 0022-2313

VL - 152

SP - 28

EP - 32

JO - Journal of Luminescence

JF - Journal of Luminescence

ER -

Effects of encaged anions on the optical and EPR spectroscopies of RE doped C12A7

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Keywords

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