Oxide coating for alkaline earth sulfide based phosphor

被引：63

作者：

Guo, CF ^{[1
]}

Chu, BL ^{[1
]}

Wu, MM ^{[1
]}

Su, Q ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Chem & Chem Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China

来源：

JOURNAL OF LUMINESCENCE | 2003年 / 105卷 / 2-4期

基金：

中国国家自然科学基金;

关键词：

surfaces; phosphors; sulfides; MONODISPERSE ZINC-SULFIDE; STIMULATED LUMINESCENCE; COLLOIDAL DISPERSIONS; THIN-FILMS; CAS-CE; CATHODOLUMINESCENCE; ELECTROLUMINESCENCE; SILICA;

D O I：

10.1016/S0022-2313(03)00117-0

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：121 / 126

页数：6

共 29 条

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