Oxide coating for alkaline earth sulfide based phosphor

Chongfeng Guo; Benli Chu; Mingmei Wu; Qiang Su

doi:10.1016/S0022-2313(03)00117-0

Oxide coating for alkaline earth sulfide based phosphor

Chongfeng Guo, Benli Chu, Mingmei Wu, Qiang Su^*

^*Corresponding author for this work

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

71 Citations (Scopus)

Abstract

An investigation is reported on the coating of the alkaline earth sulfide based red emitting phosphor Ca_0.8Sr_0.2S:Eu²⁺, Tm³⁺ by a thin layer of SiO₂ or TiO₂ using the sol-gel process. Their alkoxides were used as precursors and were dissolved in an aqueous ethanol medium. EDX (energy dispersive X-ray), SEM (scanning electron microscopy) and powder XRD (X-ray diffraction) were used to characterize the coating. The properties of coated phosphors were also tested; resistances of coated phosphors to moisture and other atmospheric components have been enhanced to a great degree without more loss of their optical properties. When the ratio of oxide ranges from 2% to 5% in weight, the brightness of phosphor has no remarkable change but the stability has been improved greatly.

Original language	English
Pages (from-to)	121-126
Number of pages	6
Journal	Journal of Luminescence
Volume	105
Issue number	2-4
DOIs	https://doi.org/10.1016/S0022-2313(03)00117-0
Publication status	Published - Dec 2003

Keywords

Phosphors
Sulfides
Surfaces

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10.1016/S0022-2313(03)00117-0

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title = "Oxide coating for alkaline earth sulfide based phosphor",

abstract = "An investigation is reported on the coating of the alkaline earth sulfide based red emitting phosphor Ca0.8Sr0.2S:Eu2+, Tm3+ by a thin layer of SiO2 or TiO2 using the sol-gel process. Their alkoxides were used as precursors and were dissolved in an aqueous ethanol medium. EDX (energy dispersive X-ray), SEM (scanning electron microscopy) and powder XRD (X-ray diffraction) were used to characterize the coating. The properties of coated phosphors were also tested; resistances of coated phosphors to moisture and other atmospheric components have been enhanced to a great degree without more loss of their optical properties. When the ratio of oxide ranges from 2% to 5% in weight, the brightness of phosphor has no remarkable change but the stability has been improved greatly.",

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T1 - Oxide coating for alkaline earth sulfide based phosphor

AU - Guo, Chongfeng

AU - Chu, Benli

AU - Wu, Mingmei

AU - Su, Qiang

PY - 2003/12

Y1 - 2003/12

N2 - An investigation is reported on the coating of the alkaline earth sulfide based red emitting phosphor Ca0.8Sr0.2S:Eu2+, Tm3+ by a thin layer of SiO2 or TiO2 using the sol-gel process. Their alkoxides were used as precursors and were dissolved in an aqueous ethanol medium. EDX (energy dispersive X-ray), SEM (scanning electron microscopy) and powder XRD (X-ray diffraction) were used to characterize the coating. The properties of coated phosphors were also tested; resistances of coated phosphors to moisture and other atmospheric components have been enhanced to a great degree without more loss of their optical properties. When the ratio of oxide ranges from 2% to 5% in weight, the brightness of phosphor has no remarkable change but the stability has been improved greatly.

AB - An investigation is reported on the coating of the alkaline earth sulfide based red emitting phosphor Ca0.8Sr0.2S:Eu2+, Tm3+ by a thin layer of SiO2 or TiO2 using the sol-gel process. Their alkoxides were used as precursors and were dissolved in an aqueous ethanol medium. EDX (energy dispersive X-ray), SEM (scanning electron microscopy) and powder XRD (X-ray diffraction) were used to characterize the coating. The properties of coated phosphors were also tested; resistances of coated phosphors to moisture and other atmospheric components have been enhanced to a great degree without more loss of their optical properties. When the ratio of oxide ranges from 2% to 5% in weight, the brightness of phosphor has no remarkable change but the stability has been improved greatly.

KW - Phosphors

KW - Sulfides

KW - Surfaces

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DO - 10.1016/S0022-2313(03)00117-0

M3 - Article

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EP - 126

JO - Journal of Luminescence

JF - Journal of Luminescence

SN - 0022-2313

IS - 2-4

ER -

Oxide coating for alkaline earth sulfide based phosphor

Abstract

Keywords

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