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Organic electroluminescent device comprising a polymer layer containing a polyimide having triphenylamine derivative unit

An electroluminescence and triphenylamine technology, applied in the field of organic electroluminescence devices, can solve the problem of difficulty in controlling the thickness of a thin conjugated polymer intermediate layer, and achieve excellent mechanical strength and thermal stability, good film forming performance, good Effects of Lifetime Characteristics

Active Publication Date: 2006-08-02
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, thickness control of thin conjugated polymer interlayers is fundamentally difficult, which is a serious problem for practical applications

Method used

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  • Organic electroluminescent device comprising a polymer layer containing a polyimide having triphenylamine derivative unit
  • Organic electroluminescent device comprising a polymer layer containing a polyimide having triphenylamine derivative unit
  • Organic electroluminescent device comprising a polymer layer containing a polyimide having triphenylamine derivative unit

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Embodiment 1

[0071] Embodiment 1: the synthesis of compound (1)

[0072] Synthesis of N,N'-diphenyl-N,N'-bis(4-aminophenyl)-1,1-biphenyl-4,4'-diamine

[0073] In a 100mL three-necked flask, dissolve 1.56g 4,4'-dibromobiphenyl, 2.30g 4-nitrodiphenylamine, 1.44g tert-butoxide sodium and 0.51g tris(dibenzylidene) in 50mL p-xylene acetone) dipalladium, followed by adding 0.3 mL of tri-tert-butylphosphine to the resulting mixture, resulting in a reaction at about 150° C. in a nitrogen atmosphere for about 16 hours. After the reaction was completed, the resulting solution was filtered to remove solid matter, and dissolved in excess chloroform. The salt was filtered with distilled water, and the resulting solution was concentrated. Then, purification was carried out by column chromatography and recrystallization to obtain 1.2 g of powdery N,N'-diphenyl-N,N'-bis(4-nitrophenyl)-1,1-biphenyl - 4,4'-diamine. The obtained powder was dissolved in 50 mL of ethanol, 1.5 mL of hydrazine monohydrat...

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Abstract

An organic EL device has a layer containing a polyimide having a triphenylamine derivative (TPD) unit. The use of the polyimide as a polymer layer material can ensure solvent selectivity in coating the light-emitting layer and the organic EL device exhibits good luminance efficiency even after a prolonged period use.

Description

technical field [0001] The present invention relates to organic electroluminescent devices comprising a polymer interlayer comprising polyimide (PI) having a triphenylamine derivative (TPD) structure. Background technique [0002] An organic electroluminescent (EL) device is an active-driven light-emitting display device that operates on the principle that when an electric current is applied to a fluorescent or phosphorescent organic compound layer (hereinafter referred to as "organic layer"), electrons and holes Incorporates in the organic layer and then emits light. Organic EL devices have various advantages including light weight, simple components, simple manufacturing process, and offering a wide viewing angle. Furthermore, the organic EL device enables perfect display of moving images with high color purity, and the device has electrical properties suitable for portable electronic devices at low power consumption and low driving voltage. [0003] A general organic EL...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10H05B33/22
CPCH01L51/0053H01L51/0035H01L51/0037H01L51/0003H01L51/0039H01L2251/308C08G73/10H01L51/0059H01L51/5048Y10S428/917Y10T428/31721H10K71/12H10K85/111H10K85/1135H10K85/115H10K85/621H10K85/631H10K50/14H10K2102/103C08G73/02C08G73/06C08G61/12
Inventor 郑明燮孙炳熙李泰雨
Owner SAMSUNG DISPLAY CO LTD
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