Encapsulation of strontium aluminate phosphors to enhance water resistance and luminescence

Zhu, Yong; Zeng, Jianghua; Li, Wenyu; Li, Xu; Guan, Qingbin; Liu, Yingliang

doi:10.1016/j.apsusc.2009.04.031

Cited by 40 publications

(19 citation statements)

References 29 publications

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“…The SiO 2 , 43 Al 2 O 3 , 44 SrF 2 , 45 boron nitride (BN) 46 compounds, phosphoric acid (H 3 PO 4 ) 47 organic ligands, 48,49 and an inorganic layer 47 have been used for phos-phor encapsulation. Different encapsulation processes have been reported in the literature for obtaining stable phosphors.…”

Section: Photoluminescent Phosphor Compositesmentioning

confidence: 99%

Developments in Eu⁺²‐Doped Strontium Aluminate and Polymer/Strontium Aluminate Composite

et al. 2014

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The discovery of rare earth based phosphors in 1960s started a new era of luminescence. In comparison with sulfide-based phosphors, strontium aluminates received worldwide acceptance because of their chemical stability and good luminescent properties. The SrAl x O y :Eu 2+ ,Dy 3+ phosphors excited by UV or visible light emit phosphorescence in the blue-green region after the excitation source has been removed, and the phosphorescence last for more than 15 h. The major disadvantage of SrAl x O y :Eu 2+ ,Dy 3+ phosphors is that they are prone to hydrolysis and their luminescent properties gradually deteriorate. The dispersion of these phosphors in a waterproof polymer matrix is an alternative method reported for retaining their luminescent properties. The review extensively deals with strontium aluminate based luminescent materials, the mechanism of luminescence, their synthesis techniques, and different mixing procedures to prepare polymer/strontium aluminate composites. Different methods to improve the dispersion of the strontium aluminate in the polymer matrix are also outlined. C

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Section: Photoluminescent Phosphor Compositesmentioning

confidence: 99%

Developments in Eu⁺²‐Doped Strontium Aluminate and Polymer/Strontium Aluminate Composite

et al. 2014

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“…Several encapsulation processes are typically used for powder phosphors, including sol-gel processing and chemical vapor deposition (CVD) [10][11][12][13]. These methods, however, have a number of drawbacks: insufficient environmental safety, poor accessibility, and low production rate.…”

Section: Introductionmentioning

confidence: 99%

Preparation of core/shell luminescent structures by ion-plasma deposition

et al. 2015

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We have investigated the preparation of encapsulating oxide coatings on the surface of the com mercially available copper doped zinc sulfide electroluminescent phosphor E 455 by ion plasma deposition. The encapsulants used were titanium, zirconium, and magnesium oxides. In our experiments, we varied the deposition time and the oxygen pressure in the sample chamber. As a result, optimal conditions were found for encapsulant film growth on the phosphor powder, which considerably improved the service stability of the emission of electroluminescent light sources. After service aging, the brightness of a magnesium oxide encapsulated phosphor sample was 80% higher than that of the uncoated sample.

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“…4 To avoid this above-mentioned drawback, the phosphor is encapsulated with several inorganic and/or organic materials. [5][6][7][8][9][10][11][12][13][14][15] The luminous intensity of the coated pigment depends on the dispersion of the pigment (phosphor) in the polymer (paint) matrix. 16 However, because SrAl 2 O 4 :Eu 2+ ,Dy 3+ is a mineral material, it's dispersion in an organic (polymeric) base paint matrix and the fast hydrolysis of this pigment in waterborne environments are major drawbacks.…”

Section: Introductionmentioning

confidence: 99%

The effect of the surface coating of a strontium mono-aluminate europium dysprosium-based (SrAl₂O₄:Eu²⁺,Dy³⁺) phosphor by polyethylene (PE), polystyrene (PS) and their dual system on the photoluminescence properties of the pigment

2019

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Encapsulation of strontium aluminate phosphors to enhance water resistance and luminescence

Cited by 40 publications

References 29 publications

Developments in Eu⁺²‐Doped Strontium Aluminate and Polymer/Strontium Aluminate Composite

Developments in Eu⁺²‐Doped Strontium Aluminate and Polymer/Strontium Aluminate Composite

Preparation of core/shell luminescent structures by ion-plasma deposition

The effect of the surface coating of a strontium mono-aluminate europium dysprosium-based (SrAl₂O₄:Eu²⁺,Dy³⁺) phosphor by polyethylene (PE), polystyrene (PS) and their dual system on the photoluminescence properties of the pigment

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Encapsulation of strontium aluminate phosphors to enhance water resistance and luminescence

Cited by 40 publications

References 29 publications

Developments in Eu+2‐Doped Strontium Aluminate and Polymer/Strontium Aluminate Composite

Developments in Eu+2‐Doped Strontium Aluminate and Polymer/Strontium Aluminate Composite

Preparation of core/shell luminescent structures by ion-plasma deposition

The effect of the surface coating of a strontium mono-aluminate europium dysprosium-based (SrAl2O4:Eu2+,Dy3+) phosphor by polyethylene (PE), polystyrene (PS) and their dual system on the photoluminescence properties of the pigment

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Developments in Eu⁺²‐Doped Strontium Aluminate and Polymer/Strontium Aluminate Composite

Developments in Eu⁺²‐Doped Strontium Aluminate and Polymer/Strontium Aluminate Composite

The effect of the surface coating of a strontium mono-aluminate europium dysprosium-based (SrAl₂O₄:Eu²⁺,Dy³⁺) phosphor by polyethylene (PE), polystyrene (PS) and their dual system on the photoluminescence properties of the pigment