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Organic EL element, method for fabricating the same and organic el display device

An organic and component technology, applied in the field of organic EL layer composition, can solve the problem of reduced luminous life, and achieve the effects of low driving voltage, high display quality, and low interlayer short circuit tolerance

Inactive Publication Date: 2006-09-06
OPTREX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] On the other hand, if a dopant with high oxidative properties is used to lower the driving voltage of the organic EL element, a non-light emitting region is formed, or the luminescence lifetime is reduced due to moisture contained in the element
On the contrary, if a dopant with low oxidative property is used, display unevenness in thickness distribution becomes conspicuous, even though the formation of non-light-emitting regions can be suppressed or the reduction of light-emitting lifetime can be suppressed

Method used

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  • Organic EL element, method for fabricating the same and organic el display device
  • Organic EL element, method for fabricating the same and organic el display device
  • Organic EL element, method for fabricating the same and organic el display device

Examples

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Effect test

Embodiment 1

[0093] Example 1 will be explained with reference to Table 1. An organic EL element was manufactured, which has a laminated structure including an anode, a first organic thin film (hole injection layer), a second organic thin film (hole transfer layer), a third organic thin film (light emitting layer), a fourth organic thin film Thin film (electron injection layer) and cathode. The anode consists of a 150 nm ITO film. Using a solution of PTPDEK (5 mg / mL) and p-toluenesulfonic acid (20% by weight) as a dopant in cyclohexanone, a first organic thin film (hole injection layer) was provided by spraying. The second organic thin film (hole transport layer) was composed of 2-TNATA with a thickness of 50 nm. The third organic thin film (light emission layer) is made of the Alq of 60nm thickness 3 Composition, the fourth organic thin film (electron injection layer) is composed of Lif with a film thickness of 0.5 nm. The cathode consisted of an aluminum film of 80nm.

[0094] Compare...

Embodiment 2

[0100] In this example, an organic EL element having a laminated structure including an anode, a first organic thin film (hole injection layer), a second organic thin film (hole transport layer), a third organic thin film (light emitting layer) was fabricated. layer), the fourth organic thin film (electron injection layer) and the cathode. The anode is composed of a 150 nm ITO film. When setting the first organic thin film (hole injection layer), first 150% by weight of sulfosalicylic acid is added as a dopant to the oligoaniline unit represented by chemical formula A and tetracarboxylic dianhydride, and the mixture is dissolved in cyclohexane In a ketone solution, the mixed solution was applied as an applied film by a sputtering method. Then, the applied film was baked at 250° C. for 1 hour to obtain an organic thin film-forming molecule represented by Chemical Formula B.

[0101] Chemical formula A:

[0102]

[0103] Chemical formula B:

[0104]

[0105] The second...

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Abstract

The invention provides an organ EI element, which can prevent non-uniformity of chromaticity caused by film thickness and interlaminar circuit durability, with excellent display quality and interlaminar circuit durability, so can decrease driving voltage and. The organ EI element comprises anode 11, cathode 12 and organ EI layer 13. And the organ EI layer 13 comprises a hole injection layer 131 and a hole shift layer 132. The hole injection layer comprises organ film forming molecule and the dopant which can oxygenize the molecule, and the reduction potential of dopant relative to normal hydrogen electrode is 0.5-0.8V and the ionization potential of the hole shift layer is 8.5*10<-19> or less.

Description

technical field [0001] The present invention relates to an organic EL (electroluminescent) element, its manufacturing method and an organic EL display panel, and particularly relates to the composition of the organic EL layer in the organic EL element. Background technique [0002] In recent years, many studies and explorations have been made on organic EL display panels using organic EL elements. The organic EL display panel is expected to be a next-generation display panel because it has a wider viewing angle range and faster response than a liquid crystal display panel, and because there are organic substances with various light-emitting properties. An organic EL element used in an organic EL display panel includes an anode, a cathode facing the anode, and an organic EL layer between the anode and the cathode. Usually, an anode, an organic EL layer and a cathode are laminated sequentially from the surface of the substrate. [0003] The organic EL layer has a single-laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/54H01L51/56H05B33/14H05B33/10
CPCH01L51/5052H01L51/5048Y10T428/24942H10K50/155H10K50/14B05B1/30A01M7/0067A01C23/002A01C23/005B05B13/04
Inventor 中村伸宏門前和博原田是伴大谷新樹
Owner OPTREX CORP