Hybrid nanoparticles and illumination devices using the hybrid nanoparticles

1. A hybrid nanoparticle comprising:

an organic blue-light emitting material; and

an inorganic material bonded to the organic blue-light emitting material;

wherein the hybrid nanoparticle further comprises an inorganic shell encapsulating the organic blue-light emitting material and the inorganic material, and

wherein pores of the inorganic shell are sealed with at least one of a transition metal salt, a transition metal complex salt, and a transition metal chloride.

2. The hybrid nanoparticle of claim 1 , wherein the organic blue-light emitting material comprises at least one of a blue fluorescent material and a blue phosphorescent material.

3. The hybrid nanoparticie of claim 2 , wherein the blue fluorescent material comprises at least one of 9,10-dibromoanthracene, a bis-triazinylamino)stil benedisulfonic acid derivative, a bis-stilbiphenyl derivative, and 2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene, and wherein the blue phosphorescent material comprises an iridium(III) complex including at least one of tris(2-(2,4-difluorophenyl)pyridinate) iridium(III), bis(2-(2,4-difluorophenyl) pyridinate)picolinic acid iridium (III), tris(3,4,7,8-tetramethyl-1,10-phenantronato) iridium(III), and tris(2,9-dimethyl-4,7-diphenyl-1,10-phenanthrolinato) iridium(III).

4. The hybrid nanoparticle of claim 1 , where the inorganic material comprises silica.

5. The hybrid nanoparticle of claim 1 , wherein the inorganic material is physically bonded to the organic blue-light emitting material, covalently bonded to the organic blue-light emitting material, or hydrogen-bonded to a resin containing the organic blue-light emitting material.

6. The hybrid nanoparticle of claim 1 , wherein the inorganic shell comprises a silica shell.

7. A transparent light guide comprising:

a resin containing at least one red-light emitting material, at least one green-light emitting material, and at least one organic blue-light emitting material bonded with an inorganic material, wherein the resin comprises an acrylic resin; and

a reflecting sheet;

wherein a surface of the at least one organic blue-fight emitting material bonded with the inorganic material is sealed with at least one of a transition metal salt, a transition metal complex salt, and a transition metal chloride,

and further wherein the reflecting sheet is disposed to cover a surface of the resin.

8. The transparent light guide of claim 7 , wherein the at least one red-light emitting material comprises a Eu 3+ tri-n-butyl complex.

9. The transparent light guide of claim 7 , wherein the at least one green-light emitting material comprises a Tb 3+ tri-n-butyl complex.

10. The transparent light guide of claim 7 , wherein the at least one organic blue-light emitting material comprises at least one of a blue fluorescent material including 9,10-dibromoanthracene, a bis-(triazinylamino)stilbenedisulfonic acid derivative, a bis-stilbiphenyl derivative, and 2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene; and a blue phosphorescent material including tris(2-(2,4-difluorophenyl)pyridinate) iridium(III), bis(2-(2,4-difluorophenyl) pyridinate)picolinic acid iridium(III), tris(3,4,7,8-tetramethyl-1,10-phenantrolinato)iridium(III), and tris(2,9-dimethyl-4,7-diphenyl-1,10-phenanthrolinato) iridium(III).

11. The transparent light guide of claim 7 , wherein the inorganic material comprises silica and the at least one organic blue-light emitting material bonded with the inorganic material is coated with the silica.

12. A backlight for a liquid crystal display comprising the transparent light guide of claim 7 .

13. A planar illumination device comprising the transparent light guide of claim 7 .

14. A method of forming a hybrid nanoparticle, the method comprising:

providing an organic blue-light emitting material; and

bonding an inorganic material to the organic blue-light emitting material to form the hybrid nanoparticle;

wherein the method further comprises encapsulating the organic blue-light emitting material and the inorganic material bonded to each other in an inorganic shell, and sealing pores of the inorganic shell with at least one of a transition metal salt, a transition metal complex salt, and a transition metal chloride.

15. The method of claim 14 , wherein the organic blue-light emitting material comprises at least one of a blue fluorescent material including at least one of 9,10-dibromoarithracene, a bis-(triazinylamino)stilbenedisulfonic acid derivative, a bis-stilbiphenyl derivative, and 2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene; and a blue phosphorescent material including at least one of tris(2-(2,4-difluorophenyl)pyridinate) iridium(III), bis(2-(2,4-difluorophenyl) pyridinate)picolinic acid iridium(III), tris(3,4,7,8-tetramethyl-1,10-phenantrolinato) iridium(III), and tris(2,9-dimethyl-4,7-diphenyl-1,10-phenanthrolinato) iridium(III).

16. The method of claim 14 , wherein the inorganic material comprises silica and wherein the bonding comprises bonding the inorganic material to the organic blue-light emitting material physically.

17. The method of claim 14 , wherein the bonding step comprises:

preparing a compound of the organic blue-light emitting material and an alkoxy group; and

hydrolysis-condensing the alkoxy group with an aikoxysilane, wherein the alkoxy group is an ethoxy group, and the alkoxysilane is tetraethoxysilane (TEOS).

18. The method of claim 14 , wherein the bonding step comprises:

pi-electron-conjugating the organic blue-light emitting material and a silane coupling agent containing an alkoxy group, wherein the silane coupling agent comprises phenyltriethoxysilane, the alkoxy group comprises an ethoxy group, and the alkoxysilane comprises tetraethoxysilane (TEOS); and

hydrolysis-condensing the alkoxy group with an alkoxysilane.

19. The method of claim 14 , wherein the bonding step comprises:

mixing the organic blue-light emitting material with a resin; and

forming a hydrogen-bond between the resin and the inorganic material.

20. The method of claim 14 , wherein the hybrid nanoparticle has pores, and

wherein the method further comprises:

sealing the pores of the hybrid nanoparticle with at least one of a transition metal salt, a transition metal complex salt, and a transition metal chloride.