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Method for preparing red-light rare-earth organic complex electroluminescent material and device

A rare-earth organic and luminescent technology, applied in the direction of luminescent materials, chemical instruments and methods, etc.

Inactive Publication Date: 2004-01-28
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It is not difficult to see from the above that although the performance of electroluminescent devices using rare earth europium complexes as luminescent media has been significantly improved in recent years, compared with common organic molecules and polymer electroluminescent devices, rare earth organic complexes The efficiency and brightness of electroluminescent devices need to be further improved and improved

Method used

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  • Method for preparing red-light rare-earth organic complex electroluminescent material and device
  • Method for preparing red-light rare-earth organic complex electroluminescent material and device
  • Method for preparing red-light rare-earth organic complex electroluminescent material and device

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Experimental program
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Effect test

Embodiment 1

[0017] Get 3 mmoles of dibenzoylmethane (DBM) and 1 mmoles of 3,4,7,8-tetramethyl-1,10-phenanthroline and dissolve in ethanol, then add 3 mmoles of sodium hydroxide aqueous solution, under the condition of stirring and heating, slowly add 10 ml of 0.1 mmol / ml europium trichloride aqueous solution dropwise. Heat the reaction at 60°C for 30 minutes, wash the product with water and ethanol, and recrystallize to obtain Eu(DBM) 3 (Tmphen). with Eu(DBM) 3 (Tmphen) was prepared as ITO / TPD / Eu(DBM) 3 (Tmphen): CBP / BCP / AlQ / LiF / Al electroluminescent device, in a vacuum of 10 -3 Evaporate the organic and metal electrode layers under the pressure of Pa, the evaporation rate of the organic layer is controlled at 4 Å / s, the evaporation rate of LiF is controlled at 0.5 Å / s, the evaporation rate of the metal is controlled at 5 Å / s, and the doping concentration Controlled at 1%. Among them, the thickness of TPD layer is 40nm, Eu(DBM) 3 (Tmphen): CBP layer 30nm, BCP layer 20nm, AlQ layer 3...

Embodiment 2

[0019] Get 6 mmoles of dibenzoylmethane (DBM) and 2 mmoles of 3,4,7,8-tetramethyl-1,10-o-phenanthroline and dissolve in chloroform, then add 6 mmoles of triethylamine, Under the condition of stirring and heating, 20 ml of 0.1 mmol / ml europium trichloride ethanol solution was slowly added dropwise. Heat the reaction at 40°C for 1 hour, remove the reaction solvent to obtain Eu(DBM) 3 (Tmphen), washed with water, washed with ethanol, and recrystallized. with Eu(DBM) 3 (Tmphen) was prepared as ITO / TPD / Eu(DBM) 3 (Tmphen): CBP / BCP / AlQ / LiF / Al electroluminescent device, in a vacuum of 10 -4 Evaporate the organic and metal electrode layers under the pressure of Pa, the evaporation rate of the organic layer is controlled at 2  / s, the evaporation rate of LiF is controlled at 1  / s, the metal evaporation rate is controlled at 8  / s, and the doping concentration Controlled at 3%. Among them, the thickness of the TPD layer is 30nm, the Eu complex: CBP layer is 20nm, the BCP layer is 1...

Embodiment 3

[0021] Get 3 millimoles of trifluoroacetylthiophene acetone (TTA) and 1 millimole of 3,4,7,8-tetramethyl-1,10-o-phenanthroline and dissolve in ethanol, then add 3 millimoles of sodium hydroxide aqueous solution, under the condition of stirring and heating, slowly add 10 ml of 0.1 mmol / ml europium trichloride aqueous solution dropwise. Heat the reaction at 70°C for 4 hours, wash with water, wash with ethanol, and recrystallize to obtain Eu(TTA) 3 (Tmphen), with Eu(TTA) 3 (Tmphen) was prepared as ITO / TPD / Eu(TTA) 3 (Tmphen): CBP / BCP / AlQ / LiF / Al electroluminescent device, in a vacuum of 3×10 -6 The organic and metal electrode layers are evaporated under the pressure of Pa, the evaporation rate of the organic layer is controlled at 1 Å / s, the evaporation rate of LiF is controlled at 0.2 Å / s, the evaporation rate of the metal is controlled at 10 Å / s, and the doping concentration Control at 5%. Among them, the thickness of TPD layer is 35nm, Eu(TTA) 3 (Tmphen): CBP layer 250nm, B...

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Abstract

The present invention adopts dibenzoyl methane (DBM) or trifluoroacetyl-thiopheneacetone (TTA) matched with trivalent europium ion energy as first ligand, adopts 3,4,7,8-tetramethyl-1,10-phenanthroline as second ligand, then utilizeks the first ligand and second ligand according to mole ratio of 3:1 and the trivalent europium ion to form ternary europium compounding material, and makes the prepared red light rare earth organic compound material electroluminescent material into the electroluminescent device, its efficiency can be up to 4.7 cd / A, and maximum luminance is 800 cd / sq.m.

Description

technical field [0001] The invention belongs to a preparation method of red light rare earth organic complex electroluminescence material and device. Background technique [0002] Organic electroluminescence materials and devices are the international frontier research field. Display devices made of organic electroluminescent materials have shown great application prospects in the field of flat panel displays due to their low driving voltage, simple manufacturing process, large-area display devices, and the advantages of flexibility and bending. At present, many organic electroluminescent materials have begun to be commercialized, and some organic display devices have also been applied in mobile phones and car audio. However, most of the display devices made of organic small molecules and polymer light-emitting materials generally have a relatively broad emission spectrum, with a half-width generally between 100-200nm, and poor color purity. Therefore, the requirements for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06
Inventor 马东阁方俊锋
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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