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Organic light emitting device

A technology of organic light-emitting devices and organic light-emitting layers, applied in the direction of electric solid-state devices, semiconductor devices, electroluminescent light sources, etc., can solve problems such as weak heat resistance, display quality degradation, and moisture cannot be completely removed, and achieve a simple method Effect

Inactive Publication Date: 2007-04-25
FUJI ELECTRIC HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the color conversion layer (which is usually formed by photolithography), moisture may not be completely removed because the fluorescent dyes in the color conversion layer have poor heat resistance
Moisture remaining in the color conversion layer invades the pixel area and creates a non-luminous area (dark area: DA), deteriorating display quality

Method used

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  • Organic light emitting device
  • Organic light emitting device
  • Organic light emitting device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0139] [Example 1: Bottom emission type; there is a color conversion layer between upper electrode elements (cathode)]

[0140] 4 is a cross-sectional view of an organic EL display of Example 1. FIG. The organic EL display of Example 1 is a bottom emission type and uses a color conversion scheme. As shown in Figure 4, the organic EL display of example 1 comprises: transparent substrate 101; Blue filter layer 102; Green filter layer 103; Red filter layer 104; The planarization layer 105 that polymer is made; layer 106; lower electrode (anode) 107; hole injection layer 108; hole transport layer 109; organic light emitting layer 110; electron transport layer 111; electron injection layer 112; first upper electrode element (cathode) 113-1 ; the color conversion layer 114; and the second upper electrode element (cathode) 113-2.

[0141] The transparent substrate 101 is made of Corning glass (50 x 50 x 1.1 mm).

[0142] The blue filter layer 102 is formed on the transparent subst...

example 2

[0166] [Example 2: Bottom emission type; there is a color conversion layer between the lower electrode element (anode)]

[0167] The organic EL display of Example 2 was produced in the same manner as Example 1 except for the following points. 5 is a cross-sectional view of an organic EL display of Example 2. FIG. As shown in Figure 5, the organic EL display of example 2 comprises: transparent substrate 201; Blue filter layer 202; Green filter layer 203; Red filter layer 204; The planarization layer 205 of polymer; Passivation layer 206 the first lower electrode element (anode) 207-1; the color conversion layer 214; the second lower electrode element (anode) 207-2; the hole injection layer 208; the hole transport layer 209; the organic light-emitting layer 210; This layer 211; the electron injection layer 212; and the upper electrode (cathode) 213.

[0168] The organic EL display of Example 2 includes a first lower electrode element (anode) 207-1 formed over a passivation lay...

example 3

[0181] [Example 3: Top emission type; there is a color conversion layer between the lower electrode elements (cathode)]

[0182]FIG. 8 is a cross-sectional view of an organic light emitting device of Example 3. Referring to FIG. The organic light emitting device of Example 3 is a top emission type device using a color conversion scheme. As shown in FIG. 8, the organic light-emitting device of Example 3 includes: a transparent substrate 301; a first lower electrode element (cathode) 313-1; a color conversion layer 314; a second lower electrode element (cathode) 313-2; transport layer 311 ; organic light emitting layer 310 ; hole transport layer 309 ; hole injection layer 308 ; and upper electrode (anode) 307 .

[0183] The first lower electrode element (cathode) 313-1 is formed on the transparent substrate 301 as follows. An aluminum wire pattern having a film thickness of 100 nm and a line width of 2 mm was formed as a first lower electrode member by a DC magnetron sputterin...

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Abstract

It is an object of the present invention to provide a high-quality organic light-emitting device which can be produced in a simple manner and which causes little color deterioration due to the current flow in the device. The organic light-emitting device of the present invention comprises: a substrate 1; a lower electrode 7 placed on the substrate; an organic light-emitting layer 10 placed on the lower electrode and in electrical contact with the lower electrode; The upper electrodes 13 - 1 and 13 - 2 electrically contact the organic light emitting layer. The upper electrode includes a first upper electrode element 13-1, a color conversion layer 14 placed on the first upper electrode element, and a second upper electrode element 13 placed on the color conversion layer and in electrical contact with the first upper electrode element -2.

Description

[0001] Cross References to Applications [0002] This application is based on and claims priority from Japanese Patent Application No. 2005-302484 filed on October 18, 2005, the contents of which are incorporated herein by reference. technical field [0003] The present invention relates to organic light-emitting devices, and more particularly to organic light-emitting devices exhibiting high precision and good visibility and capable of being used in organic electroluminescence (hereinafter referred to as organic EL) display devices, such organic EL displays The device can be widely used in the display of mobile terminals or industrial measuring instruments. Background technique [0004] A known light emitting device for display devices is an organic EL device having a laminated film of an organic compound. Organic EL devices are thin-film self-luminous devices, and have advantages such as low driving voltage, high resolution, and wide viewing angle, so researches on practi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/54H01L51/56H01L27/32H05B33/26H05B33/10H05B33/12H05B33/28
CPCH01L51/5203H01L27/322H01L27/3281H01L51/5036H01L51/5237H10K59/38H10K59/17H10K50/125H10K59/805H10K59/873H05B33/14H05B33/12H10K50/805H10K50/844
Inventor 乡原广道川口刚司滨敏夫佐藤广喜
Owner FUJI ELECTRIC HLDG CO LTD