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Compound, charge transporting material and organic electroluminescent element

A technology of electroluminescent components and electron transport materials, which is applied in the field of charge transport materials and new compounds, can solve the problems of oxidation degradation of electron transport layer materials, expensive peripheral device drive circuits, insufficient luminous efficiency of components, etc., and achieve excellent amorphousness , excellent oxidation-reduction stability, and the effect of increasing technical value

Active Publication Date: 2010-01-27
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 3) It is difficult to achieve full-color display (especially blue is difficult) by using them; and
[0006] 4) They require expensive peripheral device drive circuits
[0028] However, the insufficient hole-blocking properties of the above-mentioned compounds have caused problems of insufficient luminous efficiency of the device and oxidative deterioration of the material of the electron transport layer because part of the holes pass through the hole-blocking material to the electron transport layer.

Method used

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  • Compound, charge transporting material and organic electroluminescent element
  • Compound, charge transporting material and organic electroluminescent element
  • Compound, charge transporting material and organic electroluminescent element

Examples

Experimental program
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Effect test

Embodiment

[0465] Hereinafter, the present invention will be described in more detail with reference to Examples. However, the present invention is not limited to the following examples as long as the gist of the present invention is not exceeded.

Synthetic example

[0467] Synthesis examples of the compounds of the present invention and compounds useful as the charge transport material of the present invention are given in Synthesis Examples 1 to 26 below. The glass transition temperature is determined by DSC measurement, the vaporization temperature is determined by Tg-DTA measurement, and the melting point is determined by DSC measurement or Tg-DTA measurement.

Synthetic example 1

[0468] (Synthesis Example 1) Final Product 1 to Final Product 2

[0469]

[0470] Final product 1

[0471] Sulfuric acid (8.0 ml) was added to a mixture of isophthalaldehyde (2.7 g), acetophenone (9.6 g) and acetic acid (57 ml) at room temperature under an atmospheric atmosphere, followed by stirring at room temperature for 6 hours. After methanol (50 ml) was added to the resulting solution and stirred, the precipitate was collected by filtration and washed with methanol, whereby the final product 1 (2.6 g) was obtained.

[0472]

[0473] Final product 2

[0474]The final product 1 (2.6g), 1-phenylacetylpyridinium bromide (6.3g), ammonium acetate (29g), acetic acid (130ml) and N,N-dimethylformamide (130ml) were dissolved in a stream of nitrogen It was stirred for 8.5 hours while heating under reflux, and water (80 ml) and methanol (80 ml) were added to the resulting solution, followed by stirring. The obtained precipitate was collected by filtration, washed with metha...

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Abstract

A charge transport material exhibiting excellent thermal stability, film forming capability, charge transport capability and luminescence characteristics; and an organic electroluminescent device of high luminance, high light emitting capability and prolonged operating life. There is provided a charge transport material comprising a compound containing two or more pyridine rings substituted at 2,4,6-positions in its molecule characterized in that the pyridine rings are substantially not conjugated with each other (provided that the pyridine rings may be optionally substituted at the 3,5-positions thereof), and further provided an organic electroluminescent device including the charge transport material.

Description

technical field [0001] The present invention relates to a novel charge transport material and a novel compound, and more particularly to a charge transport material which is stable even when electrooxidation or reduction is repeatedly performed, and an organic electroluminescent element using the charge transport material and having high efficiency and long life . Background technique [0002] As thin-film type electroluminescent (EL) elements, inorganic materials including group II-VI compounds such as ZnS, CaS or SrS doped with emission centers of Mn or rare earth elements (Eu, Ce, Tb or Sm) are common. However, EL elements prepared from this inorganic material involve the following problems: [0003] 1) They require reverse current drive (50-1000Hz); [0004] 2) They require high driving voltage (1-200V); [0005] 3) It is difficult to achieve full-color display (especially blue is difficult) by using them; and [0006] 4) They require expensive peripheral device driv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/22H05B33/14C07D213/06C07D519/00C07D471/12C07D401/04C07D401/10C07D401/12C07D405/04C07D405/10C07D409/04C07D409/10C07D221/10C07D221/18
Inventor 矢部昌义佐藤秀树畚野真代盐谷武竹内昌子
Owner MITSUBISHI RAYON CO LTD
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