Surface-modified silicate luminophores
AssigneesSeoul Semiconductor Co., Ltd., LITEC-LP GmbH
InventorsChung Hoon Lee, Walter Tews, Gundula Roth, Detlef Starick
Life of this patent
Estimating the term…
Abstract
A surface-modified silicate luminophore includes a silicate luminophore and a coating includes at least one of (a) a fluorinated coating including a fluorinated inorganic agent, a fluorinated organic agent, or a combination of fluorinated inorganic and organic agents, the fluorinated coating generating hydrophobic surface sites and (b) a combination of the fluorinated coating and at least one moisture barrier layer. The moisture barrier layer includes MgO, Al2O3, Y2O3, La2O3, Gd2O3, Lu2O3, and SiO2 or the corresponding precursors, and the coating is disposed on the surface of the silicate luminophore.
Claims13
A surface-modified silicate luminophore, comprising:
- a silicate luminophore;
- and
- a fluorinated coating disposed on the surface of the silicate luminophore and comprising a fluorine-functionalized organosilane having the general formula Si(OR)3X,
- where R=an alkyl group having one or two carbon atoms, and X comprises a fluorine-functionalized organic ligand, the fluorinated coating generating hydrophobic surface sites.
A surface-modified silicate luminophore, comprising the formula Sr3-x-y-zCaxBaySiO5:Euz, F, S, wherein 0≦x≦2, 0≦y≦2, and 0≦z≦0.5,
- wherein F is a fluorinated coating comprising a fluorinated inorganic agent, a fluorinated organic agent, or a combination of a fluorinated inorganic agent and a fluorinated organic agent, the fluorinated coating generating hydrophobic surface sites, the fluorinated coating comprising a surface fixed fluorine ion, or a surface fixed or cross-linked fluorine compound, and S is a moisture barrier layer comprising at least one selected from the group consisting of MgO, Al2O3, Y2O3, La2O3, Gd2O3, Lu2O3, SiO2, and corresponding precursors thereof.
A surface-modified silicate luminophore, comprising:
- a silicate luminophore;
- and
- a coating comprising:
- a fluorinated coating comprising a fluorinated inorganic agent, a fluorinated organic agent, or a combination of a fluorinated inorganic agent and a fluorinated organic agent, the fluorinated coating generating hydrophobic surface sites;
- and
- a moisture barrier layer comprising at least one selected from the group consisting of MgO, Al2O3, Y2O3, La2O3, Gd2O3, Lu2O3, SiO2, and corresponding precursors thereof,
- wherein the coating is disposed on the surface of the silicate luminophore.
Dependencies are inferred from the claim text.