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US 8,894,957 B2Granted
Method of producing nanophosphor particles
AssigneeSamsung Display Co., Ltd.
InventorsSoon-jae Kwon, Hyun-sik Kim
Life of this patent
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Abstract
Provided is a method of producing spherical nanophosphor particles having a uniform size distribution. When nanophosphor obtained using the method is used in a flat panel display, the flat panel display has higher screen brightness and a higher resolution.
Claims16
A method of producing nanophosphor, consisting essentially of:
- dissolving a phosphor starting material in a solvent, wherein the solvent optionally includes a surface-active agent, and adding a precipitating agent thereto, thereby producing a phosphor precursor;
- wherein the phosphor starting material consists essentially of a compound represented by ML3 where M is at least one selected from the group consisting of Y, La, Eu, Gd, Tb, Er, Yb and any mixtures thereof and L comprises Cl, Br NO3, OCH3, OC2H5, OC3H7, or OC4H9 or any mixtures thereof;
- and at least one selected from the group consisting of H3BO3, boron hydride, an organic boron compound, H3PO4, NH4H2PO4, (NH4)2HPO4, NaVO3, NH4VO3 and any mixtures thereof;
- treating the phosphor precursor with an inorganic salt;
- heat-treating the phosphor precursor treated with the inorganic salt to produce nanophosphor particles;
- and
- removing the inorganic salt by washing.
4 more elements
A method of producing a YBO3-based nanophosphor consisting essentially of:
- dissolving a phosphor starting material consisting essentially of an yttrium(Y) source compound and a boron(B) source compound in a solvent, wherein the solvent optionally includes a surface-active agent, and adding a precipitating agent thereto, thereby producing a phosphor precursor;
- wherein the yttrium(Y) source compound is represented by YL3;
- and L is at least one selected from the group consisting of Cl, Br, NO3, OCH3, OC2H5, OC3H7, OC4H9 and any mixtures thereof;
- treating the phosphor precursor with an inorganic salt;
- heat-treating the phosphor precursor treated with the inorganic salt to produce YBO3- based nanophosphor particles;
- and
- removing the inorganic salt by washing.
4 more elements
Dependencies are inferred from the claim text.