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Organic electroluminescent compound and application thereof

A compound and electroluminescence technology, applied in the field of compounds, can solve the problems of low luminous efficiency and insufficient carrier transport efficiency, and achieve the effects of improving luminous efficiency, improving carrier transport efficiency, and improving industrialization prospects.

Inactive Publication Date: 2017-01-11
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to better reflect the cross-age technical advantages of OLED over TFT-LCD, and to solve the problems in the actual application of the existing technology of OLED materials, such as the insufficient carrier transport efficiency of some existing OLED materials High, low luminous efficiency and other problems, the invention provides an organic electroluminescent compound and its application

Method used

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  • Organic electroluminescent compound and application thereof
  • Organic electroluminescent compound and application thereof
  • Organic electroluminescent compound and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0051] In addition, the present invention provides a method for preparing the above-mentioned OLED device, comprising the following steps:

[0052] 1) Ultrasonic cleaning of the transparent anode electrode ITO substrate in isopropanol for 5-10 minutes, and exposure to ultraviolet light for 20-30 minutes, followed by plasma treatment for 5-10 minutes;

[0053] 2) Put the processed ITO substrate into the evaporation equipment, and first evaporate the hole transport layer material as the hole transport layer;

[0054] 3) Then evaporate the light-emitting layer, mix and evaporate the material of the light-emitting layer, and 5--10% Ir(ppy)3;

[0055] 4) Then use the electron transport layer material to vapor-deposit an electron transport layer, then vapor-deposit 0.5-2nm LiF, and then vapor-deposit 100-200nm metal Al;

[0056] Wherein, one of the hole transport layer material, light emitting layer material, and electron transport layer material is a compound represented by genera...

Embodiment 1

[0063] The preparation method of compound 1

[0064]

[0065] Dissolve 100mmol of compound 1-a and 220mmol of 4-bromobiphenyl in 1000ml of toluene, and add 300mmol of sodium tert-butoxide and 2mmol of catalyst Pd[P(t-Bu) 3 ] 2 , and refluxed for 6 hours under the protection of nitrogen. Then, add distilled water to the reaction solution to terminate the reaction, extract with dichloromethane, wash with brine, separate the organic layer, remove the organic solvent by rotary evaporation, pass the crude product through the column, recrystallize and purify with dichloromethane and ethanol, and dry in vacuo to obtain 82 mmol product compound 1.

[0066] Molecular weight characterization MS 636.26;

[0067] 1 H-NMR: 8.01(1H), 8.05(1H), 7.82(1H), 7.85(1H), 7.61(1H), 7.57(1H), 7.53(2H), 7.43(2H), 7.32(2H), 7.28( 2H), 7.23(4H), 7.61(4H), 7.64(4H), 7.36(4H), 7.28(2H).

Embodiment 2

[0069] The preparation method of compound 2

[0070]

[0071] Dissolve 100mmol of compound 2-a and 120mmol of 4-bromobiphenyl and 120mmol of 3-bromobiphenyl in 1000ml of toluene, and add 300mmol of sodium tert-butoxide and 2mmol of catalyst Pd[P(t-Bu) 3 ] 2 , and refluxed for 6 hours under the protection of nitrogen. Then, add distilled water to the reaction solution to terminate the reaction, extract with dichloromethane, wash with brine, separate the organic layer, remove the organic solvent by rotary evaporation, pass the crude product through the column, recrystallize and purify with dichloromethane and ethanol, and dry in vacuo to obtain 70mmol product compound 2.

[0072] Molecular weight characterization MS 636.26;

[0073] 1 H-NMR: 8.03(1H), 8.02(1H), 7.81(1H), 7.82(1H), 7.67(1H), 7.59(1H), 7.53(2H), 7.43(2H), 7.32(2H), 7.28 (2H), 7.23--7.61(8H), 7.34--7.74(8H), 7.28(1H), 7.31(1H).

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Abstract

The invention provides an organic electroluminescent compound which is characterized by having a general formula (I) as shown in the specification, wherein X is N, S, O or Si element, and R1 and R2 are aromatic groups and can be the same or different; and when the X is N, the structure of the compound has a general formula (II) as shown in the specification, wherein R1 and R2 are aromatic groups at least containing C or at least containing C and N, and preferably the aromatic groups containing 3-20 C or at least containing 3-20 C and containing N. The invention further provides an OLED electron transmission layer material, a luminescent layer material and a hole-transport layer material containing the compound as shown in the general formula (I) or (II), an OLED device containing the compound as shown in the general formula (I) or (II) and a preparation method thereof. The OLED material containing the compound is applied to the electronic transmission layer, the luminescent layer and the hole-transport layer, so that an OLED display screen has the effects of high brightness, high efficiency and low power consumption.

Description

technical field [0001] The invention relates to a compound, in particular to an organic electroluminescent compound and its application. Background technique [0002] At present, TFT (Thin Film Transistor, Thin Film Field Effect Transistor)-LCD is the main display screen. Since it is a non-self-illuminating display, light must be projected through the backlight and pass through the TFT-LCD panels in sequence. Polarizers, glass substrates, liquid crystal layers, color filters, glass substrates, polarizers and other related components must finally enter the human eye for imaging to achieve the display function. It is precisely because of the above-mentioned complicated display process that its display screen has shortcomings such as slow response rate, power consumption, and narrow viewing angle in the actual application process, which is not enough to become a perfect display screen. [0003] Relatively speaking, OLED is a new type of flat panel display technology. Compared ...

Claims

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Application Information

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IPC IPC(8): C09K11/06C07D209/86C07D307/91H01L51/54
Inventor 杨红领
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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