Quinoxaline Derivative, And Light Emitting Element, Light Emitting Device, And Electronic Device Using the Quinoxaline Derivative

a technology of quinoxaline and quinoxaline, which is applied in the direction of discharge tube luminescnet screen, transportation and packaging, organic chemistry, etc., can solve the problems of light emission efficiency decline, light emission spectrum change, and light emission efficiency drop, etc., to achieve excellent heat resistance, electron transporting property and hole transporting property, excellent

Inactive Publication Date: 2008-04-03
SEMICON ENERGY LAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0037]The quinoxaline derivative of the present invention is bipolar and excellent in both electron transporting property and hole transporting property. Further, the quinoxaline derivative of the present invention has a high glass transition point and excellent heat resistance. Further, the quinoxaline derivative of the present invention is stable with respect to electrochemical oxidation or reduction.
[0038]By using the quinoxaline derivative of the present invention, which is bipolar, a light emitting element and a light emitting device in which a driving voltage is low and power consumption is low can be obtained.
[0039]Further, by using the quinoxaline derivativ

Problems solved by technology

Such a light emitting element has a lot of problems depending on its material in the case where an element property thereof is improved.
As a result, a change in the light emission spectrum or a de

Method used

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  • Quinoxaline Derivative, And Light Emitting Element, Light Emitting Device, And Electronic Device Using the Quinoxaline Derivative
  • Quinoxaline Derivative, And Light Emitting Element, Light Emitting Device, And Electronic Device Using the Quinoxaline Derivative
  • Quinoxaline Derivative, And Light Emitting Element, Light Emitting Device, And Electronic Device Using the Quinoxaline Derivative

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embodiment mode 1

[0084]A quinoxaline derivative of the present invention is represented by the general formula (1).

[0085](In the formula, R1 to R4 may be the same or different and each represent any one of a hydrogen atom, an alkyl group of carbon number 1 to 4, and an aryl group of carbon number 6 to 25. R1, R2, and R3 may bond to R2, R3, and R4, respectively, to form a condensed ring. Ar1 represents an arylene group of carbon number 6 to 25. Ar2 and Ar3 may be the same or different and each represent an arylene group of carbon number 6 to 25. Ar1 and Ar2 may bond to Ar2 and Ar3, respectively.)

[0086]In the above general formula (1), Ar1 which is connected to a phenyl group may bond in any one of the ortho position, meta position, and para position on a quinoxaline skeleton.

[0087]In the above general formula (1), as examples of the alkyl group of carbon number 1 to 4, a methyl group, an ethyl group, an isopropyl group, an n-butyl group, a sec-butyl group, an isobutyl group, a tert-butyl group, and t...

embodiment mode 2

[0107]In this embodiment mode, one mode of a light emitting element using the quinoxaline derivative of the present invention, with reference to FIGS. 1A to 1C and 2 is described.

[0108]A light emitting element of the present invention includes a plurality of layers interposed between a pair of electrodes. The plurality of layers are stacked in which layers each containing a material having a high carrier injecting property or a material having a high carrier transporting property are combined so that a light emitting region is formed apart from the electrodes, that is, so that carriers are recombined at a portion away from the electrodes. In this specification, the plurality of layers formed between the pair of electrodes is hereinafter referred to as an EL layer.

[0109]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 elect...

embodiment mode 3

[0141]In this embodiment mode, a light emitting element having a different structure from Embodiment Mode 2 is described.

[0142]By applying a structure in which the quinoxaline derivative of the present invention is dispersed in another material to the third layer 105 described in Embodiment Mode 2, light emission from the quinoxaline derivative of the present invention can be obtained. A light emitting element which emits light in blue to blue-green color region can be obtained since the quinoxaline derivative of the present invention emits light in blue to blue-green color region.

[0143]Here, various materials can be used as the material in which the quinoxaline derivative of the present invention is dispersed. In addition to the materials having a high hole transporting property and the materials having a high electron transporting property, which are described in Embodiment Mode 2, the following can be given: 4,4′-di(N-carbazolyl)-biphenyl (abbrev.: CBP); 2,2′,2″-(1,3,5-benzenetri...

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Abstract

To provide a new bipolar organic compound. In particular, to provide a bipolar organic compound having excellent heat resistance and to provide a bipolar organic compound which is electrochemically stable. Further, to provide a light emitting element and a light emitting device of which a driving voltage and power consumption are reduced by using a new bipolar organic compound. Further, to provide a light emitting element and a light emitting device which have excellent heat resistance by using a new bipolar organic compound. Further, to provide a light emitting element and a light emitting device which have a long life by using a new bipolar organic compound.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a quinoxaline derivative, and a light emitting element, a light emitting device, and an electronic device each of which uses the quinoxaline derivative.[0003]2. Description of the Related Art[0004]An organic compound has various material systems compared with an inorganic compound, and has possibility to synthesize materials having various functions depending on the molecular design. Owing to these advantages, photo electronics and electronics which use a functional organic material have been attracting attention in recent years.[0005]For example, a solar cell, a light emitting element, an organic transistor, and the like can be given as examples of an electronic device using an organic compound as a functional organic material. These are devices that take advantage of electric properties and optical properties of the organic compound. Of these, a light emitting element has, in particula...

Claims

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Application Information

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IPC IPC(8): H01J1/62C07D241/36
CPCC07D241/36C07D403/14C09K11/06C09K2211/1007C09K2211/1011C09K2211/1029H05B33/20C09K2211/185H01L51/0072H01L51/0081H01L51/0085H01L51/5012C09K2211/1044Y10T428/31504C07D241/42H10K85/324H10K85/6572H10K85/342H10K50/11H10K50/15H10K50/16
Inventor EGAWA, MASAKAZUSEO, SATOSHIOHSAWA, NOBUHARU
Owner SEMICON ENERGY LAB CO LTD
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