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Oxide coating for alkaline earth sulfide based phosphor
- Source :
-
Journal of Luminescence . Dec2003, Vol. 105 Issue 2-4, p121. 6p. - Publication Year :
- 2003
-
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. [Copyright &y& Elsevier]
- Subjects :
- *ALKALINE earth metals
*SULFIDES
*SURFACE coatings
*OXIDES
Subjects
Details
- Language :
- English
- ISSN :
- 00222313
- Volume :
- 105
- Issue :
- 2-4
- Database :
- Academic Search Index
- Journal :
- Journal of Luminescence
- Publication Type :
- Academic Journal
- Accession number :
- 11113475
- Full Text :
- https://doi.org/10.1016/S0022-2313(03)00117-0