Organometallic Complex, and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using the Organometallic Complex

a technology of organometallic complexes and complexes, applied in the field of organometallic complexes, can solve the problems of limited types of ethylenediamine derivatives and -diketone which can be used as raw materials, and limitations on the types of organometallic complexes using pyrazine derivatives, etc., to achieve high color purity, wide variation of emission color, and high emission efficiency

Inactive Publication Date: 2008-12-18
SEMICON ENERGY LAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0050]By carrying out the present invention, a wider variety of organometallic complexes that can emit phosphorescence, in particular, a wider variety of organometallic complexes, with which a light-emitting element having a sharp emission spectrum can be formed, can be provided. Moreover, an organometallic complex having high emission efficiency can be provided.
[0051]Further, by forming a light-emitting element using an organometallic complex of the present invention, a light-emitting element having high color purity

Problems solved by technology

For example, a pyrazine derivative which is used as a ligand of the organometallic complex disclosed in Reference 2 is synthesized by a dehydration condensation reaction of ethylenediamine and β-diketone (benzyl) and a dehydrogenation reaction following the dehydration condensation reaction; however, there are limitations on the types of ethylenediamine derivatives and β-diketone which can be used as raw materials, and thus, the types of pyrazine derivatives are also limited.
Therefore, naturally, there are also limitations on the types of or

Method used

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  • Organometallic Complex, and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using the Organometallic Complex
  • Organometallic Complex, and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using the Organometallic Complex
  • Organometallic Complex, and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using the Organometallic Complex

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embodiment mode 1

[0074]Embodiment Mode 1 will describe an organometallic complex of the present invention.

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[0075]An organometallic complex of the present invention is formed by ortho metalation of a 2-alkoxy-3-arylpyrazine derivative represented by the following general formula (G0) with respect to an ion of a metal belonging to Group 9 or Group 10.

[0076]In the formula, Ar represents an aryl group. R represents an alkoxy group having 1 to 4 carbon atoms, and R1 and R2 individually represent hydrogen or an alkyl group having 1 to 4 carbon atoms.

[0077]The 2-alkoxy-3-arylpyrazine derivative represented by the general formula (G0) can be synthesized by the following simple synthetic scheme. For example, as represented by the following scheme (a), the 2-alkoxy-3-arylpyrazine derivative can be obtained by reacting a chloropyrazine derivative (A1) with alkoxide (A2). Alternatively, as shown in the following scheme (a′), a halide of arene (A1′) is lithiated with alkyllithium or the like, and is reacted with...

embodiment mode 2

[0094]Embodiment Mode 2 will describe a mode of a light-emitting element which has the organometallic complex of the present invention described in Embodiment Mode 1, as a light-emitting substance with reference to FIG. 1.

[0095]FIG. 1 is a view showing a light-emitting element including a light-emitting layer 113 between a first electrode 101 and a second electrode 102. The light-emitting layer 113 includes such an organometallic complex of the present invention as described in Embodiment Mode 1.

[0096]By applying a voltage to such a light-emitting element, holes injected from the first electrode 101 side and electrons injected from the second electrode 102 side recombine with each other in the light-emitting layer 113 to bring the organometallic complex of the present invention to an excited state. When the organometallic complex in the excited state returns to the ground state, it emits light. As thus described, the organometallic complex of the present invention functions as a lig...

embodiment mode 3

[0128]A light-emitting element of the present invention may have a plurality of light-emitting layers. For example, white light can be obtained by providing a plurality of light-emitting layers and mixing light emitted from each of the light-emitting layers. Accordingly, white color light emission can be obtained for example. In Embodiment Mode 3, a light-emitting element having a plurality of light-emitting layers is described with reference to FIG. 2.

[0129]In FIG. 2, a first light-emitting layer 213 and a second light-emitting layer 215 are provided between a first electrode 201 and a second electrode 202. Mixed light of light emitted from the first light-emitting layer 213 and light emitted from the second light-emitting layer 215 can be obtained. A separation layer 214 is preferably formed between the first light-emitting layer 213 and the second light-emitting layer 215. When voltage is applied such that the potential of the first electrode 201 is higher than the potential of t...

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Abstract

According to the present invention, a wider variation of organometallic complexes that can emit phosphorescence can be provided by applying, as a ligand, an organic compound from which a variety of derivatives can be easily synthesized. In particular, an organometallic complex having a sharp emission spectrum is provided. Further, an organometallic complex having high emission efficiency is provided. An organometallic complex represented by the general formula (G1) is provided. In the formula, Ar represents an aryl group, R represents an alkoxy group having 1 to 4 carbon atoms, and R1 and R2 individually represent either hydrogen or an alkyl group having 1 to 4 carbon atoms.

Description

TECHNICAL FIELD[0001]The present invention relates to an organometallic complex. In particular, the present invention relates to an organometallic complex that is capable of converting a triplet excited state into luminescence. In addition, the present invention relates to a light-emitting element, a light-emitting device and an electronic device which use the organometallic complex.BACKGROUND ART[0002]Organic compounds absorb light, and thereby the compounds are converted to be in an excited state. By going through this excited state, such organic compounds generate various reactions (such as photochemical reactions) in some cases, or luminescence is produced in some cases. Therefore, various applications of the organic compounds have been being made.[0003]As one example of the photochemical reactions, a reaction (oxygen addition) of singlet oxygen with an unsaturated organic molecule is known (refer to Reference 1: Haruo INOUE, et al., Basic Chemistry Course PHOTOCHEMISTRY I (Maru...

Claims

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Application Information

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IPC IPC(8): C07F15/00
CPCC07F15/0033C09K11/06
Inventor INOUE, HIDEKOSEO, SATOSHIOHSAWA, NOBUHARU
Owner SEMICON ENERGY LAB CO LTD
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