Method for forming OLED devices with patterned hole or electron transport layers

Patent metadata

Field	Value
Publication number	US-9349957-B2
Application number	US-201213432823-A
Country	US
Kind code	B2
Filing date	Mar 28, 2012
Priority date	Jun 16, 2011
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

An organic light emitting display device includes a hole transport layer (HTL) having a first region and a second region, an emitting layer (EML) disposed on the hole transport layer in the first region, a hydrophobic pattern disposed on the hole transport layer in the second region and an electron transport layer (ETL) disposed on the hydrophobic pattern and the emitting layer.

First claim

What is claimed is:

1. An organic light emitting structure comprising:
a substrate having a first region and a second region;
a pixel defining layer selectively on the second region of the substrate;
a hole transport layer (HTL) continuously on the first region and the second region of the substrate;
an emitting layer (EML) disposed on and contacting the hole transport layer in the first region;
a hydrophobic pattern disposed on and contacting the hole transport layer in the second region; and
an electron transport layer (ETL) disposed on the hydrophobic pattern and the emitting layer,
wherein the first region contacts and does not overlap the second region,
a surface of the hole transport layer in the first region is relatively hydrophilic with respect to a surface of the hole transport layer in the second region, and
the hole transport layer contacts a bottom surface of the hydrophobic pattern and a top surface of the pixel defining layer.

2. The organic light emitting structure of claim 1 , wherein the first region corresponds to a pixel region and the second region corresponds to a non-pixel region.

3. The organic light emitting structure of claim 1 , wherein the emitting layer is confined by the hydrophobic pattern.

4. The organic light emitting structure of claim 1 , further comprising a hole injection layer (HIL) disposed beneath the hole transport layer.

5. The organic light emitting structure of claim 1 , further comprising an electron injection layer (EIL) disposed on the electron transport layer.

6. The organic light emitting structure of claim 1 , wherein the hydrophobic pattern includes at least one fluorine-based material selected from the group consisting of polymer, oligomer, dendrimer and monomer containing at least one carbon atom combined or hybridized with at least one fluorine atom, or includes at least oneorganosilane-based material containing at least one organic functional group combined with a silicon atom.

7. The organic light emitting structure of claim 6 , wherein the fluorine-based material has a repeating unit represented by a formula of —(CF 2 —CF 2 )n-.

8. The organic light emitting structure of claim 6 , wherein the organosilane-based material is represented by a following chemical formula;

wherein each of R 1 to R 4 independently represents hydrogen, a C 1 to C 20 alkyl group, a C 1 to C 20 alkoxy group, halogen, an amino group or a hydroxyl group, and
at least one of R 1 to R 4 represents a C 1 to C 20 alkyl group or a C 1 to C 20 alkoxy group.

9. The organic light emitting structure of claim 8 , wherein the C 1 to C 20 alkyl group or the C 1 to C 20 alkoxy group has at least one fluorine atom substituent.

10. The organic light emitting structure of claim 1 , wherein the hydrophobic pattern has a thickness of about 1,000 Å to about 3 μm.

11. The organic light emitting structure of claim 1 , wherein the hole transport layer includes:
a first pattern located in the first region; and
a second pattern located in the second region.

12. The organic light emitting structure of claim 11 , wherein the first pattern includes a hole transport material, and the second pattern includes a hole transport material and a cross-linked or polymerized photosensitive material.

13. The organic light emitting structure of claim 12 , wherein the second pattern has an electrical conductivity lower than that of the first pattern.

14. The organic light emitting structure of claim 12 , wherein the photosensitive material includes an acrylate-based material or a methacrylate-based material.

15. The organic light emitting structure of claim 1 , wherein the electron transport layer includes a third pattern and a fourth pattern, the third pattern and the fourth pattern overlapping the first region and the second region, respectively.

16. The organic light emitting structure of claim 15 , wherein the third pattern includes an electron transport material, and the fourth pattern includes an electron transport material and a cross-linked or polymerized photosensitive material.

17. The organic light emitting structure of claim 16 , wherein the fourth pattern has an electrical conductivity lower than that of the third pattern.

18. An organic light emitting display device comprising:
a first substrate having a pixel region and a non-pixel region;
a first electrode disposed on the first substrate;
a pixel defining layer (PDL) disposed on the first substrate, the pixel defining layer partially exposing the first electrode in the pixel region;
a hole transport layer disposed continuously on the pixel defining layer and the exposed first electrode;
a hydrophobic pattern disposed on and contacting the hole transport layer in the non-pixel region;
an emitting layer disposed on and contacting the hole transport layer in the pixel region;
an electron transport layer disposed on the hydrophobic pattern and the emitting layer; and
a second electrode disposed on the electron transport layer,
wherein the pixel region contacts and does not overlap the non-pixel region, a surface of the hole transport layer in the pixel region is relatively hydrophilic with respect to a surface of the hole transport layer in the non-pixel region, and
the hole transport layer contacts a bottom surface of the hydrophobic pattern and a top surface of the pixel defining layer.

19. The device of claim 18 , further comprising a switching device disposed on the first substrate, the switching device being electrically connected to the first electrode.

20. The device of claim 18 , further comprising a hole injection layer disposed on the pixel defining layer and the exposed first electrode, and beneath the hole transport layer.

21. The device of claim 18 , further comprising an electron injection layer disposed between the electron transport layer and the second electrode.

22. The device of claim 18 , wherein the pixel defining layer has a thickness of about 1,000 Å to about 4,000 Å.

23. The device of claim 18 , wherein the hole transport layer includes a first pattern and a second pattern, the second pattern having an electrical conductivity lower than that of the first pattern.

24. The device of claim 23 , wherein the first pattern is disposed on the exposed first electrode and a sidewall of the pixel defining layer, and the second pattern is disposed on a surface of the pixel defining layer.

25. The device of claim 23 , wherein the first pattern is disposed on the exposed first electrode and a portion of a sidewall of the pixel defining layer, and the second pattern is disposed on a surface of the pixel defining layer and on a portion of the sidewall of the pixel defining layer not covered by the first pattern.

26. The device of claim 23 , wherein the first pattern is disposed on the exposed first electrode, and the second pattern is disposed on a surface and a sidewall of the pixel defining layer.

27. The device of claim 23 , wherein the first pattern is disposed on a portion of the exposed first electrode, and the second pattern is disposed on the pixel defining layer and on a portion of the exposed first electrode not covered by the first pattern.

28. The device of claim 18 , wherein the electron transport layer includes a third patter

Assignees

• Shin Hyea-Weon
• Lee Seung-Mook
• Park Sang-Hun
• Kim Jae-Bok
• Kim Young-Il
• Ha Jae-Kook
• Samsung Display Co Ltd

Inventors

• Shin Hyea-Weon
• Lee Seung-Mook
• Park Sang-Hun
• Kim Jae-Bok
• Kim Young-Il
• Ha Jae-Kook

Classifications

• H01L51/003

  Electricity · mapped topic

• H01L51/0018

  Electricity · mapped topic

• H01L51/0015

  Electricity · mapped topic

• H01L51/0019

  Electricity · mapped topic

• H01L51/0016

  Electricity · mapped topic