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Organic electroluminescent element

An electroluminescent element and luminescent technology, applied in the direction of electroluminescent light source, electrical components, electric light source, etc., can solve the problems of quenching luminescence, complicated process, and increase of product manufacturing cost, and achieve simple and simplified forming process Manufacturing process, the effect of reducing the number

Inactive Publication Date: 2012-03-28
ASON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the case of having to repeat substantially the same process many times to manufacture a multi-photon organic EL element like a multi-light emitting unit, there is a problem in that a plurality of deposition chambers are provided, and many deposition chambers are required. The process of forming the charge generation layer and the layer in contact with it will become complicated, and it will be combined with the complexity of the control of each process, which will greatly increase the manufacturing cost of the product.
[0017] Here, as electron-donating substances other than the above-mentioned alkali metals, for example, Patent Document 17 discloses a series of organic substances called leuco bases, but these organic substances have the property of reducing luminescent organic substances. And the point of quenching its luminescence also has the same disadvantages

Method used

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  • Organic electroluminescent element
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0159] As the organic EL element of Example 1, the layer described below was sequentially stacked, which had figure 1 An organic EL element 1 of the structure shown. The constituent materials and thickness of each layer are as follows.

[0160] 1) Anode

[0161] ITO (Indium Tin Oxide), 800 Angstroms

[0162] 2) Strong electron-accepting material layer

[0163] HATCN6 (hexaazatriphenylene derivative), 200 Angstroms

[0164] 3) Hole transport layer

[0165] NPB{4,4′-bis[N-(2-naphthyl)-N-anilino]biphenyl}, 500 Angstroms

[0166] 4) Light-emitting layer

[0167] Alq3 [tris(8-hydroxyquinoline) aluminum complex], 300 Angstroms

[0168] 5) Electron transport layer

[0169] KLET02 manufactured by CHEMIPRO KASEI KAISHA, LTD., Japan, 250 Angstroms

[0170] 6) Insulating organic layer

[0171] Ca(dpm) 2 [bis(2,2,6,6-tetramethyl-3,5-heptanedionate) calcium], 60 Angstroms

[0172] 7) Strong electron-accepting material layer

[0173] HATCN6 (hexaazatriphenylene derivative), 200...

Embodiment 2

[0225] As the organic EL element of Example 2, an organic EL element having a structure in which the layers described below were sequentially laminated on a glass substrate was produced.

[0226] 1) Anode

[0227] ITO (Indium Tin Oxide), 800 Angstroms

[0228] 2) Strong electron-accepting material layer

[0229] HATCN6 (hexaazatriphenylene derivative), 200 Angstroms

[0230] 3) Hole transport layer

[0231] NPB{4,4′-bis[N-(2-naphthyl)-N-anilino]biphenyl}, 500 Angstroms

[0232] 4) Light-emitting layer

[0233] Alq3 [tris(8-hydroxyquinoline) aluminum complex], 200 Angstroms

[0234] 5) Electron transport layer

[0235] KLET02 manufactured by CHEMIPRO KASEI KAISHA, LTD., Japan, 250 Angstroms

[0236] 6) Insulating organic layer (hole-transporting organic layer, a layer that functions as an insulating layer on the electron-transporting site)

[0237] NPB{4,4′-bis[N-(2-naphthyl)-N-anilino]biphenyl}, 60 Angstroms

[0238] 7) Strong electron-accepting material layer

[023...

Embodiment 3

[0262] As the organic EL element of Example 3, an organic EL element having two light-emitting layers, that is, two light-emitting units, was fabricated by sequentially laminating the layers described below on a glass substrate.

[0263] 1) Anode

[0264] ITO (Indium Tin Oxide), 800 Angstroms

[0265] 2) Strong electron-accepting material layer

[0266] HATCN6 (hexaazatriphenylene derivative), 200 Angstroms

[0267] 3) The hole transport layer of the first light-emitting unit

[0268] NPB{4,4′-bis[N-(2-naphthyl)-N-anilino]biphenyl}, 500 Angstroms

[0269] 4) The light-emitting layer of the first light-emitting unit

[0270] Alq3 [tris(8-hydroxyquinoline) aluminum complex], 200 Angstroms

[0271] 5) The electron transport layer of the first light-emitting unit

[0272] KLET02 manufactured by CHEMIPRO KASEI KAISHA, LTD., Japan, 250 Angstroms

[0273] 6) Insulating organic layer (hole-transporting organic layer, a layer that functions as an insulating layer on the electron...

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Abstract

Provided is a structure of an organic EL element capable of reducing the product cost by drastically simplifying the fabrication process as compared with a conventional multi-photon organic EL element. An insulating organic layer having a low dielectric constant is interposed to smooth the transfer of electron charges between a strong electron-accepting material and an electron transport layer included in a charge generation layer of the conventional multi-photon organic EL element.

Description

technical field [0001] The present invention relates to an organic electroluminescent element (hereinafter sometimes simply referred to as "organic EL element") used in a planar light source and a display element. Background technique [0002] An organic EL element having a light-emitting layer made of an organic compound between opposing anodes and cathodes has recently attracted attention as a key to realizing a large-area display element driven by low voltage. Tang et al. of Eastman Kodak Company adopted a structure in which organic compounds with different carrier transport properties are stacked in order to increase the efficiency of the device, and holes and electrons are injected in a well-balanced manner through the anode and the cathode, respectively. In addition, by adding The thickness of the organic layer sandwiched by the cathode and anode is controlled at 2000 below, thus successfully achieving 1000cd / mm with an applied voltage below 10V 2 High luminance and...

Claims

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Application Information

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IPC IPC(8): H05B33/12H01L51/50
CPCH01L51/5096H01L51/0071H05B33/22H01L51/5278H01L51/0079H10K85/657H10K85/321H10K50/19H10K50/16H10K50/18
Inventor 松本敏男
Owner ASON TECH
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