Electroluminescent element and electronic device including the same

• US 7,800,302 B2
• Filed: 05/30/2006
• Issued: 09/21/2010
• Est. Priority Date: 04/13/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Cho, Kyung Sang, Lee, Jae Ho, Choi, Byoung Lyong, Lee, Eun Kyung, Kwon, Soon Jae
• Primary Examiner(s): Guharay; Karabi
• Application Number:
  US11/442,875
• Publication Number:
  US 20070241662A1
• Time in Patent Office: 1,575 Days
• Field of Search: 313/509, 313/506, 313/503
• US Class Current: 313/509
• CPC Class Codes: H05B 33/20 characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
• CPC Class Codes: Y10T 428/2929 Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]

Abstract

An electroluminescent element and an electronic device including the electroluminescent element include a glass template having a silica layer as a matrix, electrodes and a luminescent material. Since the electroluminescent element according to the present invention includes silica as a matrix, the electroluminescent element has a stabilized structure even though a space between the luminescent layer and the electrode of the glass template is not filled. Further, such an electroluminescent element may be easily prepared, and thus may be effectively applied to various electronic devices, such as display devices, illumination devices and backlight units.

Claims

1. An electroluminescent element, the element comprising:

a glass template, which includes a silica matrix and a plurality of pores,

electrodes on opposing sides of the glass template, and

a luminescent material in the plurality of pores,

wherein the luminescent material comprises an inorganic phosphor and a quantum dot.

2. The element as set forth in claim 1, wherein the glass template further comprises a protective film on an outer layer of an upper electrode.

3. The element as set forth in claim 1, wherein the glass template is laminated on a substrate.

4. The element as set forth in claim 3, wherein the substrate is selected from the group consisting of glass, ITO glass, quartz, a silicon wafer, a silica-applied substrate and an alumina-applied substrate.

5. The element as set forth in claim 1, wherein the glass template has any one structure selected from the group consisting of a fiber type, a tape type and a double-sided luminescence type.

6. The element as set forth in claim 5, wherein the fiber type glass template comprises a silica layer, an upper electrode and a lower electrode respectively positioned at an outer portion and an inner portion of the silica layer, and a luminescent material interposed between the upper electrode and the lower electrode.

7. The element as set forth in claim 6, wherein the fiber type glass template further comprises a protective film on an outer layer of the upper electrode.

8. The element as set forth in claim 6, wherein the luminescent material is inserted into pores of the glass template at predetermined intervals.

9. The element as set forth in claim 6, wherein the fiber type glass template is laminated on a substrate.

10. The element as set forth in claim 9, wherein the substrate is selected from the group consisting of glass, ITO glass, quartz, a silicon wafer, a silica-applied substrate and an alumina-applied substrate.

11. The element as set forth in claim 5, wherein the tape type glass template comprises a silica layer, an upper electrode and a lower electrode respectively positioned at an upper portion and a lower portion of the silica layer, and a luminescent material interposed between the upper electrode and the lower electrode.

12. The element as set forth in claim 11, wherein the tape type glass template further comprises a protective film on an outer layer of the upper electrode.

13. The element as set forth in claim 11, wherein the luminescent material is inserted into pores of the glass template at predetermined intervals.

14. The element as set forth in claim 11, wherein the tape type glass template is laminated on a substrate.

15. The element as set forth in claim 14, wherein the substrate is selected from the group consisting of glass, ITO glass, quartz, a silicon wafer, a silica-applied substrate and an alumina-applied substrate.

16. The element as set forth in claim 11, wherein the tape type glass template further comprises a lower insulating layer between the lower electrode and the , luminescent material and an upper insulating layer between the luminescent material and the upper electrode.

17. The element as set forth in claim 16, wherein the upper insulating layer and the lower insulating layer are each a thin or thick dielectric film.

18. The element as set forth in claim 5, wherein the double-sided luminescence type glass template comprises a silica layer, a luminescent material disposed at each of an upper portion and a lower portion of the silica layer, and a common electrode positioned between upper and lower luminescent materials.

19. The element as set forth in claim 18, wherein the double-sided luminescence type glass template further comprises a protective film on exposed upper and lower surfaces thereof.

20. The element as set forth in claim 18, wherein the luminescent material is inserted into pores of the glass template at predetermined intervals.

21. The element as set forth in claim 18, wherein the double-sided luminescence type glass template is laminated on a substrate.

22. The element as set forth in claim 21, wherein the substrate is selected from the group consisting of glass, ITO glass, quartz, a silicon wafer, a silica-applied substrate and an alumina-applied substrate.

23. The element as set forth in claim 1, wherein the quantum dot is in a cavity of the inorganic phosphor.

24. The element as set forth in claim 1, wherein the inorganic phosphor has a size of about 1 μ

m to about 10 μ

m, and the quantum dot has a size of about 1 μ

m to about 10 nm.

25. The element as set forth in claim 1, wherein the inorganic phosphor is selected from the group consisting of La₂O₂S:

Eu, Li₂Mg(MoO₄);

Eu,Sm, (Ba,Sr)₂SiO₄;

Eu, ZnS;

Cu,Al, SrGa₂S₄;

Eu, Sr₅(PO₄)₃Cl;

Eu, (SrMg)₅PO₄Cl;

Eu, BaMg₂Al_l6O₂₇;

Eu, and mixtures thereof.

26. The element as set forth in claim 1, wherein the quantum dot is selected from the group consisting of group II-VI compound semiconductor nanocrystals, including CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe and HgTe, group III-V compound semiconductor nanocrystals, including GaN, GaP, GaAs, InP and InAs, and mixtures thereof.

27. An electronic device, comprising an electroluminescent element, the electroluminescent element comprising:

a glass template, which includes a silica matrix and a plurality of pores,

electrodes on opposing sides of the glass template, and

a luminescent material in the plurality of pores,

wherein the luminescent material comprises an inorganic phosphor and a quantum dot.

28. The electronic device as set forth in claim 27, wherein the electronic device is selected from the group consisting of display devices, illumination devices and backlight units.