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Light-emitting device, method for producing same, and display

A technology for light-emitting elements and light-emitting bodies, which is applied in lighting devices, electrical components, electroluminescent light sources, etc., can solve the problems of light-emitting attenuation, difficulty in achieving high brightness, and insufficient surface uniformity of light-emitting brightness.

Inactive Publication Date: 2009-04-29
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned method, the surface area of ​​the organic EL element is only increased by about 2 to 3 times that of the conventional one, and the surface area cannot be dramatically increased.
[0018] In addition, in conventional organic EL display devices, since each organic layer is a thin film, its film thickness needs to be precisely controlled. When the film thickness of each organic layer is not uniform, the in-plane uniformity of luminance may vary. full
[0019] Furthermore, in the conventional organic EL display device, although the external light reflection measures realized by the circular polarizing plate have been proposed, there is a problem that the light emission from the organic EL element is also attenuated due to the circular polarizing plate. achieve high brightness

Method used

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  • Light-emitting device, method for producing same, and display
  • Light-emitting device, method for producing same, and display
  • Light-emitting device, method for producing same, and display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0341] use figure 1 The light-emitting element of Example 1 of the present invention will be described. Since this light-emitting element has the same configuration as that of the light-emitting element in Embodiment 1, description of the configuration will be omitted. In this light emitting element, a commercially available glass substrate with an ITO film is used as the transparent substrate 8 on which the electron injection electrode 7 is formed. In addition, on the metal oxide semiconductor porous body, a TiO2 thin film porous body is used. As the light-emitting organic material 5 supported on the surface of the porous body, 3-(2-benzothiazolyl)-7-diethylaminocoumarin-4-carboxylic acid (BDCC) was used. A glass substrate was used for the substrate 1 , Al was used for the hole injection electrode 2 , and PVK was used for the hole transport layer 3 .

[0342] Next, a method of manufacturing the light-emitting element will be described with reference to FIG. 2 . This ligh...

Embodiment 2

[0358] use Figure 5 A display device in Embodiment 2 of the present invention will be described. This display device 40 has the thin film transistor 21 similarly to the display device in the third embodiment, but differs in that it has pixels 41R, 41G, and 41B of three colors of RGB. In each of the pixels 41R, 41G, and 41B, the light-emitting organic material is changed so as to correspond to each of them. In addition, in this display device 40 , there is provided a pixel separation region 42 that separates each pixel. In the pixel isolation region 42 , black dye is carried on the surface of the metal oxide semiconductor particle 4 to isolate each pixel.

[0359] A method of manufacturing the display device 40 will be described. Since the display device 40 is a device in which the light emitting elements of the first embodiment are arranged two-dimensionally, substantially the same method of manufacturing the light emitting elements of the first embodiment can be performed...

Embodiment 3

[0361] use figure 1 A light-emitting element in Example 3 of the present invention will be described. In this light-emitting element, compared with the light-emitting element in Example 1, CuO and Cu 2 The difference is that the mixture of O replaces A1. As a result, the hole injection electrode is black. The hole injection electrode was formed by the sputtering method in the same manner as the hole injection electrode of Example 1.

[0362] The evaluation of contrast is to irradiate 1001x white light from an angle of 45 degrees with respect to the light-emitting surface of the device, and the light-emitting brightness is 300cd / m 2 Under the conditions, the ratio of the luminance when the light-emitting element is turned on / off to the non-light-emitting luminance is used. The contrast ratio in this Example 3 was 300:1 or more. This is better than Comparative Example 1 described later.

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PUM

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Abstract

A light-emitting device is disclosed which comprises a transparent or semitransparent first substrate, a second substrate arranged opposite to the first substrate, a transparent or semitransparent first electrode formed on the first substrate, a second electrode which is so formed on the second substrate as to be opposite to the first electrode, and a light-emitting layer interposed between the first electrode and the second electrode. The light-emitting layer contains a metal oxide semiconductor porous body by the surface of which a light-emitting organic material is supported.

Description

technical field [0001] The present invention relates to a light-emitting element that can be used as various light sources used in light-emitting displays, communications, lighting, etc., and a display device using the light-emitting element. Background technique [0002] In recent years, electroluminescent (EL) elements are expected to be used in flat-panel display devices. The EL element has advantages such as self-luminescence, excellent visibility, wide viewing angle, and fast response speed. [0003] Among EL elements currently in practical use, there are inorganic EL elements using inorganic materials as light-emitting materials, and organic EL elements using organic materials as light-emitting elements. Inorganic EL elements using inorganic materials such as zinc sulfide have problems such as complicated drive circuits and low luminance because high AC voltages are required to drive them, and practical application has not progressed. [0004] On the other hand, an o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/14H05B33/02H05B33/26H05B33/10
Inventor 小野雅行堀贤哉青山俊之小田桐优名古久美男长谷川贤治
Owner PANASONIC CORP