Method of manufacturing light-emitting display device and light-emitting display device manufactured using the method

Patent metadata

Field	Value
Publication number	US-2016343940-A1
Application number	US-201514884798-A
Country	US
Kind code	A1
Filing date	Oct 16, 2015
Priority date	May 22, 2015
Publication date	Nov 24, 2016
Grant date	—

Abstract

A method of manufacturing a light-emitting display device, the method including forming a first electrode on a substrate, the substrate including a plurality of pixel regions divided by a non-pixel region, in each of the pixel regions; forming a pixel defining layer, the pixel defining layer having a plurality of pixel openings, each of the pixel openings exposing the first electrode, on the substrate; forming a hole injection layer on the first electrode; forming a lyophilic layer on the hole injection layer to completely overlap the hole injection layer; forming a hole transport layer on the lyophilic layer; forming a light-emitting layer on the hole transport layer; and forming a second electrode on the light-emitting layer.

First claim

What is claimed is:

1 . A method of manufacturing a light-emitting display device, the method comprising:
forming a first electrode on a substrate, the substrate including a plurality of pixel regions divided by a non-pixel region, in each of the pixel regions; forming a pixel defining layer, the pixel defining layer having a plurality of pixel openings, each of the pixel openings exposing the first electrode, on the substrate; forming a hole injection layer on the first electrode; forming a lyophilic layer on the hole injection layer to completely overlap the hole injection layer by forming a lyophilic material layer, whose portion in contact with the hole injection layer is cured by light, on the hole injection layer, placing an open mask, the open mask including an opening region and a blocking region located outside the opening region, above the pixel defining layer such that the opening region overlaps the pixel regions and the non-pixel region, and irradiating the light to the lyophilic material layer; forming a hole transport layer on the lyophilic layer; forming a light-emitting layer on the hole transport layer; and forming a second electrode on the light-emitting layer.

2 . The method as claimed in claim 1 , wherein the lyophilic material layer includes a first portion contacting a surface of the hole injection layer and a second portion contacting a surface of the pixel defining layer.

3 . The method as claimed in claim 2 , wherein the lyophilic material layer is formed using a slit coating method.

4 . The method as claimed in claim 2 , wherein forming the lyophilic layer further includes removing the second portion using a developing solution after irradiating the light to the lyophilic material layer.

5 . The method as claimed in claim 1 , wherein an entirety of the lyophilic material layer contacts the hole injection layer within each of the pixel openings of the pixel defining layer.

6 . The method as claimed in claim 5 , wherein the lyophilic material layer is formed using an inkjet printing method or a nozzle printing method.

7 . The method as claimed in claim 1 , wherein the lyophilic material layer includes one or more of olefin, acrylate, methacrylate, vinyl ether, quinone, benzophenone, benzoin ether, aryl ketone, peroxide, biimidazole, benzyl dimethyl ketal, hydroxyl alkyl phenyl acetophone, dialkoxy actophenone, trimethylbenzoyl phosphine oxide derivatives, aminoketone, benzoyl cyclohexanol, methyl thiophenyl morpholino ketone, morpholino phenyl amino ketone, alpha halogeno acetophenone, oxysulfonyl ketone, sulfonyl ketone, oxysulfonyl ketone, sulfonyl ketone, benzoyl oxime ester, thioxanthone, camphorquinone, ketocoumarin, or Michler's ketone.

8 . The method as claimed in claim 7 , wherein the hole injection layer includes one or more of 4,4′,4″-tris(3-methylphenylphenylamino)triphenylamine (MTDATA), copper phthalocyanine (CuPc), polyaniline (PANI), or poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate (PEDOT/PSS).

9 . The method as claimed in claim 1 , wherein forming the hole injection layer is performed using an inkjet printing method or a nozzle printing method.

10 . The method as claimed in claim 1 , wherein forming the hole transport layer is performed using an inkjet printing method or a nozzle printing method.

11 . The method as claimed in claim 1 , wherein the pixel defining layer includes an insulating material that contains fluorine.

12 . The method as claimed in claim 1 , wherein the opening region of the open mask consists of one opening.

13 . The method as claimed in claim 1 , wherein the light is ultraviolet (UV) light.

14 . A light-emitting display device, comprising:
a substrate including a plurality of pixel regions divided by a non-pixel region; a first electrode on the substrate in each of the pixel regions; a pixel defining layer on the substrate and including a plurality of pixel openings, each of the pixel openings exposing the first electrode; a hole injection layer on the first electrode in each of the pixel openings; a lyophilic layer on the hole injection layer, the lyophilic layer completely overlapping the hole injection layer and including a material whose portion in contact with the hole injection layer reacts to light; a hole transport layer on the lyophilic layer; a light-emitting layer on the hole transport layer; and a second electrode on the light-emitting layer.

15 . The light-emitting display device as claimed in claim 14 , wherein the lyophilic layer is in each of the pixel openings.

16 . The light-emitting display device as claimed in claim 14 , wherein the lyophilic layer is formed in a same pattern as the hole injection layer.

17 . The light-emitting display device as claimed in claim 14 , wherein the lyophilic layer includes one or more of olefin, acrylate, methacrylate, vinyl ether, quinone, benzophenone, benzoin ether, aryl ketone, peroxide, biimidazole, benzyl dimethyl ketal, hydroxyl alkyl phenyl acetophone, dialkoxy actophenone, trimethylbenzoyl phosphine oxide derivatives, aminoketone, benzoyl cyclohexanol, methyl thiophenyl morpholino ketone, morpholino phenyl amino ketone, alpha halogeno acetophenone, oxysulfonyl ketone, sulfonyl ketone, oxysulfonyl ketone, sulfonyl ketone, benzoyl oxime ester, thioxanthone, camphorquinone, ketocoumarin, or Michler's ketone.

18 . The light-emitting display device as claimed in claim 17 , wherein the hole injection layer includes one or more of 4,4′,4″-tris(3-methylphenylphenylamino)triphenylamine (MTDATA), copper phthalocyanine (CuPc), polyaniline (PANI), or poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate (PEDOT/PSS).

19 . The light-emitting display device as claimed in claim 14 , wherein the pixel defining layer includes an insulating material that contains fluorine.

20 . The light-emitting display device as claimed in claim 14 , further comprising one or more of an electron transport layer or an electron injection layer between the light-emitting layer and the second electrode.

Assignees

• Samsung Display Co Ltd

Inventors

• Kong Hyang Shik
• Kang Yoon Ho
• Kwak Dong Hoon
• Kim Sung Woong
• Kim Yool Guk
• Kim Jae Hoon
• Na Ye Seul
• Back Seok Soon
• Hwang Jae Kwon

Classifications

• H01L51/0037

  Electricity · mapped topic

• H01L51/0005 Primary

  Electricity · mapped topic

• H01L2227/323

  Electricity · mapped topic

• H01L51/5088

  Electricity · mapped topic

• H01L27/3246

  Electricity · mapped topic