Method of manufacturing organic EL element, organic EL element and organic EL display device

• US 20050042477A1
• Filed: 10/04/2004
• Published: 02/24/2005
• Est. Priority Date: 11/25/1996
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Kiguchi, Hiroshi, Kanbe, Sadao, Shimoda, Tatsuya, Miyashita, Satoru
• Granted Patent: US 7,662,425 B2
• Time in Patent Office: Days
• US Class Current: 428/690
• CPC Class Codes: C09K 2323/00 Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
• CPC Class Codes: H05B 33/10 Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/17 Passive-matrix OLED displays
• CPC Class Codes: H10K 59/173 comprising banks or shadow masks
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/135 using ink-jet printing
• CPC Class Codes: H10K 71/164 using vacuum deposition
• CPC Class Codes: Y10S 428/917 Electroluminescent
• CPC Class Codes: Y10T 428/24868 Translucent outer layer
• CPC Class Codes: Y10T 428/31855 Of addition polymer from unsaturated monomers

Abstract

A method of manufacturing an organic EL element according to the present invention comprises the steps of forming pixel electrodes (801), (802), (803) on a transparent substrate (804) and forming on the pixel electrodes by patterning luminescent layers (806), (807), (808) made of an organic compound by means of an ink-jet method. According to this method, it is possible to carry out a high precise patterning easily and in a short time, thereby enabling to carry out optimization for a film design and luminescent characteristic easily as well as making it easy to adjust a luminous efficiency.

Claims

1. A manufacturing an organic EL device, comprising:

forming a first electrode on or above a substrate,

forming a hole injection/transfer layer on or above the first electrode,

forming a luminescent layer on the hole injection/transfer layer by discharging a luminescent material composition from a nozzle toward the substrate, and

forming a second electrode opposing the first electrode,

a part of the materials contained in at least one of the hole injection/transfer layer and the luminescent layer being in the state of mutual impregnation and diffusing into the other layer at the vicinity of the interface between the luminescent layer and the hole injection/transfer layer.

2. The manufacturing an organic EL device according to claim 1, at least one compound constituting the luminescent material composition being a conductive polymer organic compound, in which π

-electron of the double bond is delocalized on the polymer chain.

3. The manufacturing an organic EL device according to claim 2, the polymer organic compound being a polyparaphenylene vinylene, its derivative or a copolymer which contains at least either one of these compounds.

4. The manufacturing an organic EL device according to claim 1, the formation of the hole injection/transfer layer by means of the ink-jet method being performed by discharging a hole injection/transfer material composition from a nozzle toward the substrate.

5. The manufacturing an organic EL device according to claim 4, at least one compound constituting the hole injection/transfer material composition being a conductive polymer organic compound, in which π

-electron of the double bond is delocalized on the polymer chain.

6. An organic EL device, comprising:

a substrate;

a first electrode formed on or above a substrate;

a hole injection/transfer layer formed on or above the first electrode;

a luminescent layer formed on the hole injection/transfer layer; and

a second electrode opposing the first electrode,

a part of the materials contained in at least one of the hole injection/transfer layer and the luminescent layer being in the state of mutual impregnation and diffusing into the other layer at the vicinity of the interface between the luminescent layer and the hole injection/transfer layer.