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Electron transport compound and organic light emitting device comprising the same

A technology for organic light-emitting devices and electron transport, applied in the fields of electro-solid devices, organic chemistry, light-emitting materials, etc., can solve the problems of deterioration, short life, low electron transport efficiency, etc.

Active Publication Date: 2007-07-25
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, conventional organic light-emitting devices, especially electron-transport compounds used in electron-injection layers or electron-transport layers, have low electron-transport efficiency and are difficult to deposit when used in displays.
Additionally, conventional electron transport suffers from short lifetime issues due to the high possibility of crystallization and deterioration

Method used

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  • Electron transport compound and organic light emitting device comprising the same
  • Electron transport compound and organic light emitting device comprising the same
  • Electron transport compound and organic light emitting device comprising the same

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Experimental program
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Embodiment approach 1

[0017] In order to accomplish the object of the present invention, the present invention provides a pyrenyl electron transport compound having a structure of Chemical Formula 1.

[0018] [chemical formula 1-1]

[0019]

[0020] The pyrenyl compound of Chemical Formula 1-1 is a very important compound among hydrocarbons. In pyrenyl compounds, the carbons are numbered clockwise from the carbon with substituents A-C. Thus, electron transporting compounds of embodiments of the present invention include pyrenyl compounds wherein A-C are attached to carbons 1 and 6 and B is attached to carbons 3 and 8. Substituents A, B and C may be substituted or unsubstituted.

[0021] The electron transport compound is a compound that injects electrons from the cathode to other layers or transports the injected electrons to other layers. For example, in an organic light emitting device, an electron transport compound is a compound that can be a material of an electron injection layer, an el...

Embodiment 1

[0067] The ITO glass was washed after patterning so that its light emitting area became 3 mm x 3 mm. After mounting the substrate in a vacuum chamber, on ITO at 1.0 × 10 -6 Hole injection layer / hole transport layer / green light organic emission layer (matrix + dopant) / electron injection transport layer / cathode (CuPc (650 Ȧ) / NPD (400 Ȧ) / Alq 3 (200 Ȧ)+GD-1 (1%) (50 Ȧ) / PA-1 (350 Ȧ) / LiF (5 Ȧ) / Al (1000 Ȧ)). PA-1 is a pyrenyl electron transport compound of Chemical Formula 1-6.

[0068] When 0.9mA current is applied to the device, the brightness is 2452cd / m 2 , the driving voltage is 4.7V, and the values ​​of the color coordinate CIE are x=0.301 and y=0.606.

[0069] [chemical formula 1-6]

[0070]

Embodiment 2

[0072] The ITO glass was washed after patterning so that its light emitting area became 3 mm x 3 mm. After mounting the substrate in a vacuum chamber, on ITO at 1.0 × 10 -6 Hole injection layer / hole transport layer / green light organic emission layer (host + dopant) / electron injection transport layer / cathode CuPc (650 Ȧ) / NPD (400 Ȧ) / Alq 3 (200A)+GD-1(1%)(50A) / PA-2(350A) / LiF(5A) / Al(1000A). PA-2 is a pyrenyl compound of chemical formula 1-7.

[0073] When 0.9mA current is applied to the device, the brightness is 2328cd / m 2 , the driving voltage is 5.0V, and the values ​​of the color coordinate CIE are x=0.302 and y=0.612.

[0074] [chemical formula 1-7]

[0075]

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Abstract

An organic light emitting device having a pyrene based electron transport compound and an electron injecting and transport layer comprising the electron transport compound is provided.

Description

technical field [0001] The present application relates to electron transport compounds and organic light-emitting devices comprising the compounds. Background technique [0002] In general, an organic light emitting diode display is a self-luminous display that emits light by electrically exciting a fluorescent compound, and has been focused on as a next-generation display capable of solving the problems of liquid crystal displays because it can be driven at a low voltage, and the thickness can certainly be reduced , with a wide viewing angle and fast response speed, etc. [0003] An organic light emitting device includes an emissive layer between an anode and a cathode. An organic light emitting device forms excitons, ie, hole-electron pairs, by combining holes from an anode and electrons from a cathode within an organic light emitting layer, and emits light by generating energy when the excitons return to a base site. The organic light emitting device additionally compri...

Claims

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Application Information

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IPC IPC(8): C07D213/26C07D213/06C09K11/06H01L51/50H01L51/54
CPCB41M5/443B41M5/46B41M5/5218B41M5/529C09D11/50
Inventor 金重根徐正大郑贤哲宾钟官朴春键
Owner LG DISPLAY CO LTD
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