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White organic electroluminescent device

An electroluminescent device and device technology, applied in electroluminescent light sources, electro-solid devices, luminescent materials, etc., can solve problems such as the inability to prepare laminate structures and the inability of white light devices to provide emission efficiency.

Active Publication Date: 2008-12-10
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, in the case of preparing a laminate structure by wet coating, there is a problem that the layer coated in advance is dissolved by the solvent in the solution coated afterward, and the laminate structure cannot be produced
However, white light devices fabricated by this method do not provide sufficient emission efficiency

Method used

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  • White organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145]

[0146] N, N'-bis(4-bromophenyl)-N,N'-bis(4-n-butylphenyl)-1,4-phenylenediamine (3.3g, 4.8mmol) and 2,2' - Bipyridine (1.9 g, 12 mmol) was dissolved in 132 ml of dehydrated tetrahydrofuran, and then the solution was bubbled with nitrogen to replace the atmosphere of the system with nitrogen. In a nitrogen atmosphere, bis(1,5-cyclooctadiene)nickel(0){Ni(COD) 2} (3.3 g, 12 mmol) was added to the solution, followed by heating to 60° C., and performing a reaction for 3.5 hours with stirring. After the reaction was completed, the reaction mixture was cooled to room temperature (about 25° C.), and dropped into a mixed solution containing 30 ml of 25% ammonia water / 480 ml of methanol / 160 ml of ion-exchanged water, followed by stirring for 1 hour. The obtained precipitate was filtered, and dried under reduced pressure for 2 hours, and dissolved in 150 ml of toluene. Thereafter, 120 g of 1N hydrochloric acid was added to the solution, followed by stirring for 3 hours. The ...

Embodiment 2

[0148] (Synthesis of polymer compound 2)

[0149] [Formula 12]

[0150]

[0151] 22.5 g of Compound A and 17.6 g of 2,2'-bipyridine were charged into a reaction vessel, and then the atmosphere in the reaction system was replaced with nitrogen. 1,500 g of tetrahydrofuran (dehydration catalyst) degassed by bubbling argon in advance was added thereto. Then, 31 g of bis(1,5-cyclooctadiene)nickel(0) was added to the mixed solution, followed by stirring at room temperature for 10 min, and then performing a reaction at 60° C. for 3 hours. The reaction was carried out under nitrogen atmosphere.

[0152] After the reaction was completed, the reaction mixture was cooled, and a mixed solution including 200 ml of 25% ammonia water / 900 ml of methanol / 900 ml of ion-exchanged water was poured thereinto, followed by stirring for about 1 hour. Then, the resulting precipitate was filtered and recovered. This precipitate was dried under reduced pressure, and dissolved in toluene. The tol...

Embodiment 3

[0154] [Formula 13]

[0155]

[0156]

[0157] Under an inert atmosphere, compound B (10000 mg, 14.438 mmol) and compound C (8615 mg, 13.750 mmol) were dissolved in toluene (253 g), and tetrakis(triphenylphosphine)palladium (318 mg, 0.275 mmol) was added to the solution , followed by stirring at room temperature for 10 min. Subsequently, 20% tetraethylammonium hydroxide aqueous solution (49.6 g) was added to the reaction mixture, followed by heating and reflux for 13 hours under heating. After the reaction was completed, phenylboronic acid (2515 mg) was added to the reaction mixture, followed by further reflux under heating for 1 hour. Afterwards, the reaction mixture was cooled to room temperature, the reaction mass was dropped into methanol (2393 ml), and the resulting precipitate was filtered off. The resulting precipitate was washed with methanol and dried under reduced pressure to obtain a solid.

[0158] The resulting solid was dissolved in toluene (598ml), passe...

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Abstract

Disclosed is a white polymer organic electroluminescent device having excellent device characteristics such as efficiency. Specifically disclosed is a white organic electroluminescent device containing a polymer material as an electron-transporting material or a light-emitting material, wherein at least two light-emitting layers emitting light of different colors are laminated and at least one of the light-emitting layers is a crosslinked light-emitting layer. The white organic electroluminescent device is further characterized by emitting a white light as a whole. Preferably, at least one of the crosslinked light-emitting layers and at least one of the non-crosslinked light-emitting layers are in contact with each other in the white organic electroluminescent device.

Description

technical field [0001] The invention relates to a white light organic electroluminescent device. Background technique [0002] An organic electroluminescence device (hereinafter sometimes referred to as an organic EL device) is a general term for devices using an organic compound as a light-emitting material or a charge transport material in a light-emitting layer. In producing an organic EL device, a method of wet-coating a solution of a polymer material is superior in productivity to a method of vapor-phase-depositing a small-molecule material. Among organic EL devices, white light emitting devices have a wide range of applications, including white light monochrome displays combined with color filters, background color displays, or full-color displays, and white light illumination. To obtain white light emission using small molecule organic EL devices, as disclosed in e.g. "Organic EL and Displays", pp. 241-250 (published by CMC in 2001), the method of laminating light-em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/12H01L51/50
CPCC09K11/06C09K2211/1416C09K2211/1433C09K2211/145C09K2211/1458C09K2211/1466C09K2211/1475C09K2211/1483C09K2211/1491C09K2211/182C09K2211/185H05B33/14H05B33/22Y02B20/00H10K85/115H10K85/151H10K50/125H10K85/631
Inventor 上谷保则
Owner SUMITOMO CHEM CO LTD
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