BORATE CHLORIDE-BASED PHOSPHOR, AND LIGHT-EMITTING DIODE, FLUORESCENT LAMP AND PLASMA DISPLAY PANEL INCLUDING THE SAME

Abstract

Provided are a borate chloride phosphor represented by Formula 1 below, a light-emitting diode (LED) including the same, a lamp, a self-emissive liquid crystal display device (LCD), and a plasma display device (PDP).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:

FIG. 1 is a schematic view of a light-emitting diode (LED) according to an exemplary embodiment;

FIGS. 2 and 3 are cross-sectional views illustrating self-emissive liquid crystal display devices according to exemplary embodiments;

FIGS. 4 through 8 are graphs respectively illustrating X-ray diffraction (“XRD”) spectra of an exemplary phosphor produced according to Synthesis Examples 1 through 5;

FIG. 9 is a graph illustrating absorption spectra of an exemplary phosphor produced according to Synthesis Examples 1 through 5;

FIG. 10 is a light-emitting spectrum of an exemplary phosphor produced according to Synthesis Examples 1 through 5;

FIG. 11 is a graph illustrating absorption spectra of exemplary phosphors produced according to Synthesis Examples 1 and 2 and of a commercial blue phosphor; and

FIG. 12 is a graph illustrating light-emitting spectra of exemplary phosphors produced according to Synthesis Examples 1 and 2 and of a commercially available blue phosphor.

Claims

1. A borate chloride phosphor represented by Formula 1 below: (Ca(1−x−a−b−c)BaaSrbMgcEux)2B6O10.5Cl,  Formula 1where 0<x≦0.2, 0≦a≦0.5, 0≦b≦0.95, 0≦c≦0.5.

2. The borate chloride phosphor of claim 1, wherein the borate chloride phosphor is a phosphor represented by Formula 2 below: (Ca(1−x−a−b)BaaSrbEux)2B6O10.5Cl,  Formula 2where 0<x≦0.2, 0<a≦0.5, 0<b≦0.95.

3. The borate chloride phosphor of claim 1, wherein the borate chloride phosphor is a phosphor represented by Formula 3 below: (Ca(1−x−a)BaaEux)2B6O10.5Cl,  Formula 3where 0<x≦0.2, 0<a≦0.5.

4. The borate chloride phosphor of claim 1, wherein the borate chloride phosphor is a phosphor represented by Formula 4 below: Ca(1−x−b)SrbEux)2B6O10.5Cl,  Formula 4where 0<x≦0.2, 0<b≦0.95.

5. The borate chloride phosphor of claim 1, wherein the borate chloride phosphor is a phosphor represented by Formula 5 below: (Ca(1−x)Eux)2B6O10.5Cl,  Formula 5where 0<x≦0.2.

6. The borate chloride phosphor of claim 1, wherein the borate chloride phosphor is a phosphor represented by Formula 6 below: (SrbEux)2B6O10.5Cl,  Formula 6where 0<x≦0.2, 0<b≦0.95.

7. The borate chloride phosphor of claim 1, wherein the borate chloride phosphor is (Ca0.95Eu0.05)2B6O10.5Cl, (Ca0.75Ba0.2Eu0.05)2B6O10.5Cl, (Ca0.5Ba0.45Eu0.05)2B6O10.5Cl, (Ca0.45Sr0.5Eu0.05)2B6O10.5Cl, (Sr0.95Eu0.05)2B6O10.5Cl.

8. A white light emitting diode (LED) comprising: a light-emitting diode (LED); anda borate chloride phosphor of claim 1.

9. The white LED of claim 8, wherein the excitation wavelength of the white LED is from 280-410 nm.

10. The white LED of claim 8, further comprising at least one of a green phosphor and a red phosphor.

11. A lamp comprising a borate chloride phosphor of claim 1.

12. A self-emissive liquid crystal display device comprising a borate chloride phosphor of claim 1.

13. A plasma display panel (PDP) comprising a borate chloride phosphor of claim 1.

14. A method of manufacturing a borate chloride phosphor comprising: mixing a europium-containing compound, a borate compound, a chloride-containing compound, and up to a stoichiometric amount combined for each of at least one material selected from the group consisting of a calcium-containing compound, a barium-containing compound, a strontium-containing compound, and a magnesium-containing compound, sintering the mixture in a first sintering at a sintering temperature of 300-700° C., andsintering the mixture in a second sintering at a sintering temperature of 700-1000° C.

15. The method of claim 14, wherein the second sintering is performed in a mixed gas atmosphere of hydrogen and nitrogen.

16. The method of claim 15, wherein the amount of the hydrogen in the mixed gas is adjusted to be 5-10 volume percent based on the total amount of hydrogen and nitrogen.

17. The method of claim 14, wherein the europium-containing compound is Eu2O3; the borate compound is H3BO3 or B2O3, and the chloride-containing compound is CaCl2.2H2O, SrCl2.6H2O, or BaCl2.

18. The method of claim 14, wherein the calcium-containing compound is CaCO3 or CaCl2.2H2O, the barium-containing compound is BaCO3 or BaCl2, the strontium-containing compound is SrCO3 or SrCl2.6H2O, and the magnesium-containing compound is MgO or MgCO3.

19. The method of claim 14, wherein the borate chloride phosphor prepared by the method is represented by Formula 1 below: (Ca(1−x−a−b−c)BaaSrbMgcEux)2B6O10.5Cl,  Formula 1where 0<x≦0.2, 0≦a≦0.5, 0≦b≦0.95, 0≦c≦0.5.