Organic electroluminescent element and its manufacturing method

An electroluminescent device and electroluminescent technology, which can be used in the manufacture of semiconductor/solid-state devices, electric solid-state devices, electrical components, etc., and can solve problems such as insufficient durability.

Inactive Publication Date: 2007-01-10
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it cannot be said that a sufficiently satisfactory level of brightness can be obtained, and the durability is not sufficient

Method used

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  • Organic electroluminescent element and its manufacturing method
  • Organic electroluminescent element and its manufacturing method
  • Organic electroluminescent element and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0076] figure 1 It is a schematic diagram of a polymer organic EL device according to an embodiment of the present invention.

[0077] The present embodiment is characterized in that a metal oxide thin film is formed on the transparent anode 2 on the light-transmitting substrate 1 as the charge injection layer 3, and a polymer material layer as the buffer layer B having an electron blocking function and a polymer material layer as the buffer layer B having an electron blocking function are laminated thereon. Another polymer material layer of the light-emitting layer 4, the cathode 5 is formed above all of them.

[0078] That is, if figure 1 As shown, the organic electroluminescence device of the embodiment is made of a substrate 1 made of a transparent glass material, an ITO layer (indium titanium oxide) formed on the substrate 1 as the anode 2, and a charge injection layer 3 formed thereon. The metal oxide film is composed of an electron blocking layer made of a polymer mat...

Embodiment 1

[0086] Next, embodiments of the present invention are described.

[0087] structure and figure 1 given the same structure and will refer to figure 1 do explain.

[0088] The organic electroluminescent device of embodiment 1 is made by the substrate 1 that is called Corning 7029# 1mm thick glass sheet, is formed on it and is formed on the anode 2 that is made of 20nm thick ITO thin film, is formed on the anode 2 and is made of 20nm A charge injection layer 3 composed of a thick molybdenum oxide film, a polyfluorene-based compound formed on the charge injection layer 3 (especially poly[9,9-dioctylfluorene-2,7-diyl]-alternating-co- (N, N'-diphenyl)-N, N'-two (p-butyl-oxyphenyl)-1,4-diaminobenzene) (poly[9,9-dioctylfluorenyl-2,7-diyl ]-alt-co-(N,N′-diphenyl)-N,N′-di(p-butyl-oxyphenyl)-1,4-diaminobenzene) 20nm thick buffer layer B, made of polyfluorene-based compound ( Especially poly[(9,9-dioctylfluorene-2,7-diyl)-co-1,4-benzo-{2,1'-3}-thiadiazole] (poly[(9, 9-dioctylfluoreny...

Embodiment 2

[0129] Next, Embodiment 2 of the present invention will be discussed.

[0130] In the above Example 1, the polyfluorene-based compound was used in the light-emitting layer, but this example uses a PPV-based material in the light-emitting layer 4, poly[2-methoxy-5-(2-ethylhexyloxy base)-1,4-phenylenevinylene](poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene]). Like Example 1, this material is also commercially available from Nihon SiberHegner K.K.

[0131] Other structures are constituted the same as in Embodiment 1.

[0132] In this case, the luminous intensity can generally be increased further.

[0133] In addition, in Example 1 and Example 2, a glass substrate was used as the substrate 1, but it is not limited to glass. Usually glass is used. Also in this embodiment, a glass substrate is used. Various materials have been suggested as the substrate material, including glass, plastic film, and the like, and these can be used as the substrate 1 of the present inve...

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Abstract

The prsent invention provides an organic EL device which drives over a wide range from low brightness to high brightness for light source applications, and it operates stably over a wide range of brightness and has excellent life property is provided. The said device comprises at least one pair of electrodes 2 and 5, and a plurality of functional layers disposed between the electrodes 2 and 5, the functional layers comprising a layer 4 having the light emitting function, which is composed of at least one polymeric material and contains an organic solvent and a charge injection layer 3 composed of at least one inorganic material.

Description

technical field [0001] The present invention relates to an organic electroluminescence device (hereinafter simply referred to as an "organic EL device") which is an electroluminescence device used for various displays and various light sources such as a display device for a portable telephone, and to a manufacturing method thereof , and more particularly, to an organic EL device including a polymer light-emitting material in an organic thin film, which can be used in a wide range of luminance from low luminance for various display applications to high luminance for light sources. Background technique [0002] In general, an organic EL device is a light emitting device utilizing an electroluminescence phenomenon exhibited by a solid fluorescent substance, and the organic EL device has been widely put into practical use as a small-sized display. [0003] Organic EL devices can be classified into two types based on the difference in materials used in the light emitting layer. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/30H01L51/40
Inventor 八浪竜一坂上惠
Owner PANASONIC CORP
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