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Quinoxaline Derivative, and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using the Same

a technology of quinoxaline derivative and light-emitting element, which is applied in the direction of thermoelectric devices, other domestic articles, organic chemistry, etc., can solve the problems of affecting the efficiency of light-emitting elements, affecting the display quality of light-emitting elements, and changing the emission spectrum, so as to improve the display quality and the effect of excellent electron-transporting properties and reducing power consumption of such electronic devices

Inactive Publication Date: 2011-11-24
SEMICON ENERGY LAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Further, by using the bipolar organic compound of the present invention, the present invention provides a light-emitting element having excellent carrier balance. Furthermore, by using the bipolar organic compound of the present invention, the present invention provides a light-emitting element which emits light having high color purity. Moreover, by using the bipolar organic compound of the present invention, the present invention provides a light-emitting element and a light-emitting device having low driving voltage and low power consumption.
Further, by using the quinoxaline derivative of the present invention, a display device and an electronic device with low power consumption can be obtained.

Problems solved by technology

Such light-emitting elements have a lot of material-dependant problems for improvement of element characteristics.
As a result, a change in emission spectrum or a decrease in emission efficiency may occur.
However, its characteristics are not yet satisfactory, and development of a wider variety of bipolar organic compounds has been required.

Method used

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  • Quinoxaline Derivative, and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using the Same
  • Quinoxaline Derivative, and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using the Same
  • Quinoxaline Derivative, and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using the Same

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embodiment mode 1

Hereinafter, a quinoxaline derivative of the present invention is described. The quinoxaline derivative of the present invention is a quinoxaline derivative represented by the general formula (G1) below.

In the formula, α1 and α2 each independently represent an arylene group which has 13 or less carbon atoms forming a ring, for example, a divalent group derived from benzene, naphthalene, fluorene, or the like. Such a group may, but not necessarily, have a substituent. If the group has a substituent, an alkyl group having 1 to 6 carbon atoms, a phenyl group, or the like can be used.

Further, in the formula, Ar represents an aryl group which has 13 or less carbon atoms forming a ring. Specifically, a phenyl group, a biphenyl group, a naphthyl group, a fluorenyl group, and the like can be given. Such a group may have a substituent. If the group has a substituent, the group has an alkyl group having 1 to 6 carbon atoms, a phenyl group, a biphenyl group, or the like. These substituents may...

embodiment mode 2

Hereinafter, a mode of a light-emitting element using the quinoxaline derivative of the present invention is described using FIG. 1A.

A light-emitting element of the present invention has a plurality of layers between a pair of electrodes. In this embodiment mode, the light-emitting element includes a first electrode 102, a second electrode 104, and an EL layer 103 provided between the first electrode 102 and the second electrode 104. Note that in this embodiment mode, the first electrode 102 serves as an anode and that the second electrode 104 serves as a cathode. In other words, hereinafter, it is assumed that when a voltage is applied to the first electrode 102 and the second electrode 104 so that the potential of the first electrode 102 is higher than that of the second electrode 104, light emission can be obtained.

A substrate 101 is used as a support of the light-emitting element. For example, glass, plastic, or the like can be used for the substrate 101. Any material other than...

embodiment mode 3

In this embodiment mode, a light-emitting element having a structure different from the structure described in Embodiment Mode 2 is described.

The light-emitting layer 113 described in Embodiment Mode 2 contains the quinoxaline derivative of the present invention, which is dispersed in another substance; accordingly, light emission can be obtained from this quinoxaline derivative of the present invention. Since the quinoxaline derivative of the present invention exhibits emission of blue to green light, a blue to green light-emitting element can be obtained.

Here, as the substance in which the quinoxaline derivative of the present invention is dispersed, instead of the substance having a high hole-transporting property or the substance having a high electron-transporting property, which is described in Embodiment Mode 2, any of a variety of materials such as 4,4′-di(N-carbazolyl)biphenyl (abbreviation: CBP); 2,2′,2″-(1,3,5-benzenetriyl)tris(1-phenyl-1H-benzimidazole) (abbreviation: TP...

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Abstract

The present invention provides a quinoxaline derivative represented by a general formula (G1). In the formula, α1 and α2 each independently represent an arylene group which has 13 or less carbon atoms forming a ring; Ar represents an aryl group which has 13 or less carbon atoms forming a ring; R1 and R6 each independently represent any of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an aryl group which has 13 or less carbon atoms forming a ring; and R2 to R5 and R7 to R10 each independently represent any of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted biphenyl group.

Description

BACKGROUND OF THE INVENTION1. Field of the InventionThe present invention relates to a quinoxaline derivative, and a light-emitting element, a light-emitting device, and an electronic device each using the quinoxaline derivative.2. Description of the Related ArtBy using organic compounds, compared with inorganic compounds, a wider variety of structures can be taken and materials having a variety of functions depending on the molecular design can be synthesized. Because of these advantages, photo electronics and electronics each using functional organic materials have been attracting attention in recent years.As examples of electronic devices using organic compounds as functional organic materials, there are solar cells, light-emitting elements, organic transistors, and the like. These examples are devices using electric properties and optical properties of such organic compounds. In particular, light-emitting elements have been developing remarkably.A light emission mechanism is sai...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01L51/54C07D403/12
CPCC07D241/42C09K11/06C09K2211/1007C09K2211/1011C09K2211/1014Y10S428/917H01L51/0061H01L51/0072H01L51/0081H01L51/0085H01L51/5012C09K2211/1044H10K85/636H10K85/324H10K85/342H10K85/6572H10K50/11A61K31/495C07D241/40
Inventor OSAKA, HARUEOHSAWA, NOBUHARUKAWAKAMI, SACHIKO
Owner SEMICON ENERGY LAB CO LTD
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