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Illuminating device

A technology of light-emitting devices and light-emitting elements, which is applied in the direction of electric solid-state devices, semiconductor devices, electroluminescent light sources, etc., and can solve the problems of short life and insufficient life.

Inactive Publication Date: 2002-10-16
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, organic EL elements have a short lifespan in high-brightness applications.
This is because in terms of efficiency, it is inferior to high-efficiency fluorescent lamps of 80 1m / W or more, and it is better to use it under load than for high-brightness applications.
[0006] In this way, even if an organic EL element is used like a conventional planar structure, as a light source that can withstand high-brightness applications, there is a problem of so-called insufficient life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] On a polycarbonate substrate with a length of 1m, a width of 1m, and a thickness of 0.3mm, ITO is formed as a transparent anode, and poly(P-styrene) with a thickness of 80nm is coated as a light-emitting layer, and 10nm is evaporated as an electron injection cathode. Thickness of Ca, followed by evaporation of 100nm thickness of Al as a cathode, to make a light-emitting film. This luminescent film was cut into strips of 5 cm in length and 30 cm in width to form strip-shaped light-emitting elements. Secondly, if figure 1 As shown, the strip-shaped light-emitting element 10 is inserted longitudinally into a groove-shaped jig of acrylic resin substrate 11 having a metal reflective surface of 30 cm in length and 25 cm in width, and the light-emitting device 12 of the present invention is produced. At this time, the light-emitting surface of the strip-shaped light-emitting element is arranged so as to be located in a vertical direction with respect to the above-mentioned ba...

Embodiment 2

[0059] On a glass substrate with a length of 30 cm, a width of 40 cm, and a thickness of 0.5 mm, after forming an ITO film as an anode, a N, N'-2(4'-diphenylamine-4-2-phenyl)-N,N A 50nm-thick hole transport layer composed of '-2phenylbenzidine, followed by 4,4'-2(carbazole-9-isoyl)-2benzene and 3(2-phenylpyridine)iridium as the light-emitting layer (2Benzene-4-aurate)2(2-methyl-8-hydroxyquinoline)aluminum was evaporated to a thickness of 10 nm as a blocking layer at a mass ratio of 95:5 to a thickness of 30 nm. Next, a laminated cathode composed of Li with a thickness of 1 nm and Al with a thickness of 100 nm was formed to produce a rectangular light-emitting element. This luminescent plate was cut into a rectangular shape of 0.8 cm in length and 1.2 cm in width to obtain a rectangular luminescent plate. Secondly, if figure 2 As shown, the minor axis direction of the rectangular light-emitting element 20 is inserted into a groove-shaped jig of a base material 21 made of acr...

Embodiment 4

[0069] Polycarbonate is molded into a porous substrate with holes of 1 mm intervals, 2 mm in radius and 1.5 cm in depth. Al was evaporated to a thickness of 200 nm on the surface of the porous substrate having pores, and then Li was evaporated to a thickness of 1 nm as a cathode. Next, 3(8-quinoline)aluminum was evaporated to a thickness of 40 nm as an electron transport layer, and (2phenyl-4-aurate)2(2-methyl-quinoline)aluminum to a thickness of 10 nm was evaporated as a blocking layer. As a light-emitting layer, 4,4'-2(carbazole-9-acyl)-2benzene and 3(2-phenylpyridine)iridium were evaporated to a thickness of 30nm in a mass ratio of 95:5 to form a layer composed of N,N'- A hole transport layer with a thickness of 50 nm composed of 2(4'-2phenylamino-4-2phenyl)-N,N'-2phenylbenzidine. Next, ITO is formed as a transparent anode, and SiN is formed as a protective film with a thickness of 1 μm. Finally, the pores of the porous substrate are filled with cycloolefin polymer to prod...

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Abstract

A light-emitting device, wherein a plurality of light-emitting elements having a pair of electrodes and a light-emitting layer disposed between the electrodes are arranged on a substrate, wherein the light-emitting surfaces of the light-emitting elements are located in a rising direction relative to the substrate On the other hand, by forming the aforementioned light-emitting element into a strip shape, a rectangular shape, a cylindrical shape, a column shape or a porous shape, the surface area of ​​the light-emitting element can be greatly increased, the amount of current per unit area can be reduced, and even in high-brightness applications, it can provide Long-life light source.

Description

technical field [0001] The present invention relates to a light-emitting device used in backlights for display devices such as liquid crystals, lighting for indoor lighting, or display devices such as televisions. Background technique [0002] In recent years, numerous research reports have been published on organic light-emitting elements using organic materials as light-emitting materials. For example, there are Applied Physics Communications, Vol. 51, p. 913, 1987, and the like. Organic light-emitting elements have a characteristic of so-called surface emission, and recently, in particular, organic light-emitting elements with high efficiency exceeding 40 lm / W have been reported. For example, at the Spring Annual Meeting of the Society of Applied Physics (31a-H-3) in 2012. On the basis of these studies, there are increasing expectations for lighting devices and displays using surface light emitters that have not been conventionally available. [0003] Traditional light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357H01L25/04H01L51/50
CPCH01L2924/0002H10K19/901H10K50/11H10K50/182H01L2924/00G02F1/1335
Inventor 松尾三纪子佐藤彻哉杉浦久则胁田尚英
Owner PANASONIC CORP
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