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An organic electroluminescent device

An electroluminescence device and luminescence technology, which is applied in the direction of electric solid-state devices, electrical components, semiconductor devices, etc., can solve the problems of high energy consumption in preparation, affect device efficiency, poor thermal stability, etc., and achieve high luminous efficiency and high luminescence The effect of purity and good thermal stability

Active Publication Date: 2016-03-16
SHANGHIA TAOE CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional hole injection materials, such as copperphthalocyanine (CuPc), are slow to degrade, consume high energy for preparation, are not conducive to environmental protection, and they absorb light, which affects the efficiency of devices
The original hole transport materials such as NPB have poor thermal stability, which also greatly affects the life of the device.

Method used

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  • An organic electroluminescent device
  • An organic electroluminescent device
  • An organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Synthesis of compound 1

[0060] Synthesis of intermediate bromophenazine

[0061]

[0062] Bromophenazine

[0063] N9, N10-diphenylphenanthrene-9,10-diamine (15g), p-bromoiodobenzene (11.77g), Cu(OTf)2 (2.52g) and K2CO3 (7.68g, 55.6mol ), followed by adding trichlorobenzene (50g), heated to about 210°C under mechanical stirring and refluxed overnight, after the reaction was complete, the heating was stopped, and the solvent was distilled off under reduced pressure. Silica gel column chromatography was used to obtain 4.02 g of a light yellow solid with a yield of 18.74%.

[0064] Synthesis of compound 1

[0065]

[0066] In the flask, add 4-bromophenazine (0.5g), (9-phenyl-9H-carbazol-3-yl) boric acid (0.4g,), THF (30ml), tetrakis (triphenylphosphine) Palladium (100 mg), potassium carbonate aqueous solution (2 mol / l, 20 mL), heated to reflux under nitrogen protection overnight. Stop the reaction, remove THF, extract three times with dichloromethane, combine t...

Embodiment 2

[0070] Preparation of OLED using compound 1 prepared in Example 1

[0071] First, the transparent conductive ITO glass substrate 110 (with anode 120 on it) (China CSG Group Co., Ltd.) was washed in sequence with deionized water, ethanol, acetone and deionized water, and then treated with oxygen plasma for 30 seconds.

[0072] Then, compound 1 was evaporated to form a hole transport layer 130 with a thickness of 60 nm.

[0073] Then, a 30nm thick compound Alq was evaporated on the hole transport layer 3 as the light emitting layer 140 .

[0074] Then, 20nm thick Alq was evaporated on the light-emitting layer 3 as the electron transport layer 150.

[0075] Finally, 1nm LiF was vapor-deposited as the electron injection layer 160 and 100nm Al as the cathode 170 of the device.

[0076] The prepared device was measured at 10mA / cm by PhotoResearchPR650 spectrometer 2 The efficiency at the current density is 1.09cd / A, 50mA / cm 2 The efficiency at the current density is 0.98cd / A, ...

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PUM

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Abstract

The invention provides an organic electroluminescence device, which comprises an anode, a cathode and an organic layer, and the organic layer comprises one of a hole injection layer, a hole transport layer, a light emitting layer, a blocking layer, an electron injection layer and an electron transport layer One layer or more than one layer, characterized in that at least one layer of the organic layer contains the compound of the following structural formula (I).

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence, in particular to an organic electroluminescence device. Background technique [0002] Organic electroluminescent devices (OLEDs) are devices prepared by depositing a layer of organic materials between two metal electrodes by spin coating or vacuum evaporation. A classic three-layer organic electroluminescent device includes a hole transport layer, emissive layer and electron transport layer. The holes generated by the anode are combined with the electrons generated by the cathode through the hole transport layer to form excitons in the light emitting layer through the hole transport layer, and then emit light. Organic electroluminescent devices can be adjusted to emit various required lights by changing the material of the light-emitting layer as required. [0003] As a new type of display technology, organic electroluminescent devices have self-illumination, wide viewing an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/52H01L51/54
CPCH10K85/649H10K50/15H10K50/17H10K50/11
Inventor 黄锦海苏建华
Owner SHANGHIA TAOE CHEM TECH CO LTD