Aromatic amine compound, and light-emitting element, light-emitting device, and electronic appliance using the aromatic amine compound

a technology of aromatic amine and compound, which is applied in the direction of organic chemistry, luminescent compositions, other domestic articles, etc., can solve the problems of reducing the luminous efficiency of a light-emitting element, and achieve the effects of preventing the transfer of excitation energy of light-emitting materials, improving luminous efficiency, and improving luminous efficiency

Inactive Publication Date: 2007-09-20
SEMICON ENERGY LAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]It is another object of the present invention to provide a light-emitting element, a light-emitting device, and an electronic appliance each having high luminous efficiency.
[0041]The aromatic amine compound of the present invention has a wide band gap and can be used for a layer which is in contact with a light-emitting material, and moreover can be used as a material for dispersing a light-emitting material. When the aromatic amine compound of the present invention is provided in contact with a light-emitting material, the transfer of excitation energy of the light-emitting material can be prevented and the luminous efficiency can be improved. Further, even if the aromatic amine compound of the present invention is excited, the energy can transfer from the aromatic amine compound of the present invention to the light-emitting material; therefore, the luminous efficiency can be improved.
[0042]With the aromatic amine compound of the present invention used for a light-emitting element, a light-emitting device, and an electronic appliance, the light-emitting element, the light-emitting device, and the electronic appliance can have high luminous efficiency.

Problems solved by technology

The energy transfer to NPB causes a problem of decrease in luminous efficiency of a light-emitting element.

Method used

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  • Aromatic amine compound, and light-emitting element, light-emitting device, and electronic appliance using the aromatic amine compound
  • Aromatic amine compound, and light-emitting element, light-emitting device, and electronic appliance using the aromatic amine compound
  • Aromatic amine compound, and light-emitting element, light-emitting device, and electronic appliance using the aromatic amine compound

Examples

Experimental program
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Effect test

embodiment mode 1

[0119]Embodiment Mode 1 will explain an aromatic amine compound of the present invention.

[0120]An aromatic amine compound of the present invention is an aromatic amine compound expressed by General Formula (1).

[0121](In the formula, R1 and R2 each represent any of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, and an aryl group having 6 to 25 carbon atoms; A1 represents an arylene group having 6 to 25 carbon atoms; and Ar1 represents an aryl group having 6 to 25 carbon atoms. Moreover, α represents a substituent expressed by any of General Formulae (1-1) to (1-4). In General Formulae (1-1) to (1-4), R11 and R12 each represent any of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, and an aryl group having 6 to 12 carbon atoms; and R13 to R19, R21 to R29, R31 to R39, and R41 to R49 each represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.)

[0122]In General Formula (1), R1 and R2 each represent a hydrogen atom, an alkyl group having 1 to 4 car...

embodiment mode 2

[0169]An aspect of a light-emitting element using an aromatic amine compound of the present invention will be hereinafter described with reference to FIG. 1A.

[0170]A light-emitting element of the present invention has a plurality of layers between a pair of electrodes. The plurality of layers are formed by stacking a layer containing a substance with a high carrier-injecting property and a layer containing a substance with a high carrier-transporting property so that a light-emitting region is formed apart from the electrodes, i.e., so that carrier recombination is carried out in a portion apart from the electrodes.

[0171]In this embodiment mode, the light-emitting element includes a first electrode 102; a first layer 103, a second layer 104, a third layer 105, and a fourth layer 106 which are stacked in this order over the first electrode 102; and a second electrode 107 provided over them. In the explanation of this embodiment mode, the first electrode 102 functions as an anode and ...

embodiment mode 3

[0207]Embodiment Mode 3 will explain a light-emitting element with a structure different from the structure shown in Embodiment Mode 2.

[0208]Since the aromatic amine compound of the present invention has a wide band gap and high triplet and singlet levels, the aromatic amine compound of the present invention can be used for a host for dispersing a material with a light-emitting property. That is to say, the aromatic amine compound of the present invention can be used for the third layer 105 shown in Embodiment Mode 2. As the material with a light-emitting property which is dispersed in the aromatic amine compound of the present invention, various fluorescent materials and phosphorescent materials can be used.

[0209]When the aromatic amine compound of the present invention is used for the third layer 105, the second layer 104 can be formed of various materials. For example, various aromatic amine compounds can be used. As the widely used materials, the following starburst aromatic ami...

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Abstract

An object of the present invention is to provide a novel aromatic amine compound, and a light-emitting element, a light-emitting device, and an electronic appliance with high luminous efficiency. An aromatic amine compound expressed by General Formula (1) and a light-emitting element, a light-emitting device, and an electronic appliance formed using the aromatic amine compound expressed by General Formula (1) are provided. By the use of the aromatic amine compound expressed by General Formula (1), the light-emitting element, the light-emitting device, and the electronic appliance can have high luminous efficiency.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of Invention[0002]The present invention relates to an aromatic amine compound, and a light-emitting element, a light-emitting device, and an electronic appliance each using the aromatic amine compound.[0003]2. Description of the Related Art[0004]In recent years, research and development have been extensively conducted on a light-emitting element using a compound with a light-emitting property. In a basic structure of such a light-emitting element, a layer containing an organic compound with a light-emitting property is sandwiched between a pair of electrodes. By application of voltage to this element, electrons and holes are injected from the pair of electrodes to the layer containing an organic compound with a light-emitting property to cause current flow. Then, by recombination of these carriers (electrons and holes), the organic compound with a light-emitting property forms an excited state, and light is emitted when the excited state ret...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01L33/00C07D209/86C09K11/06H01L51/50
CPCC07D209/86C07D413/12H01L51/0052H01L51/006Y10S428/917H01L51/007H01L51/0071H01L51/0072H01L51/5048H01L51/0061H10K85/6565H10K85/636H10K85/633H10K85/615H10K85/657H10K85/6572H10K50/14C09K11/06C07D209/82
Inventor KAWAKAMI, SACHIKOOHSAWA, NOBUHARUNAKASHIMA, HARUESHITAGAKI, SATOKO
Owner SEMICON ENERGY LAB CO LTD
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