Bipolar copolymer blue-light main material, preparation method thereof and organic electroluminescent device

A blue light host material, bipolar copolymer technology, applied in the direction of electric solid device, semiconductor device, semiconductor/solid state device manufacturing, etc., can solve the problems of complex synthesis, harsh preparation conditions, etc., achieve simple preparation method, thermal stability, etc. Good, mild conditions

Active Publication Date: 2014-06-25
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of polymer host materials with bipolar transport properties reported so far is relatively complicated, and the preparation conditions are relatively harsh.

Method used

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  • Bipolar copolymer blue-light main material, preparation method thereof and organic electroluminescent device
  • Bipolar copolymer blue-light main material, preparation method thereof and organic electroluminescent device
  • Bipolar copolymer blue-light main material, preparation method thereof and organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A bipolar copolymer blue light host material, namely poly{4'-n-hexyloxy-N,N-bis(4-ylphenyl)aniline-co-2,6-di-n-hexyl-4,8- Diylbenzo[1,2-d;4,5-d']bisoxazole} (n=60), denoted as copolymer P1, the structural formula is as follows:

[0040]

[0041] The preparation method comprises the following steps:

[0042] Compound A1 and Compound B1 are provided respectively:

[0043]

[0044] Under argon protection, 4'-n-hexyloxy-N,N-bis(4-pinacol borate phenyl)aniline (122mg, 0.2mmol), 2,6-di-n-hexyl-4, 8-Dibromobenzo[1,2-d;4,5-d']bisoxazole (97mg, 0.2mmol) was added into a flask containing 10ml of toluene solvent, and potassium carbonate (2mL, 2mol / L) The solution was added to the flask, vacuumed to remove oxygen and filled with argon, then bistriphenylphosphine palladium dichloride (5.6mg, 0.008mmol) was added, and the flask was heated to 100°C for the following Suzuki coupling reaction for 48h:

[0045]

[0046] Subsequently, the polymerization reaction was stopped aft...

Embodiment 2

[0050] A bipolar copolymer blue light host material, namely poly{4'-methoxy-N,N-di(4-ylphenyl)aniline-co-2,6-di-n-eicosyl-4, 8-diylbenzo[1,2-d;4,5-d']bisoxazole} (n=100), denoted as copolymer P2, the structural formula is as follows:

[0051]

[0052] The preparation method comprises the following steps:

[0053] Compound A2 and Compound B2 are provided respectively:

[0054]

[0055] Under the protection of a mixed gas of nitrogen and argon, 4'-methoxy-N,N-bis(4-pinacol borate phenyl)aniline (158mg, 0.3mmol), 2,6-dinormal di Add dedecyl-4,8-dibromobenzo[1,2-d;4,5-d']bisoxazole (263mg, 0.3mmol) and 15mL tetrahydrofuran into a 50mL two-necked bottle, fully dissolve and pass After entering the mixed gas of nitrogen and argon and exhausting the air for about 20 minutes, tetrakistriphenylphosphine palladium (4mg, 0.003mmol) was added into it, and after fully dissolving, sodium bicarbonate (3mL, 2mol / L) solution was added, and then fully After purging the mixed gas of nitr...

Embodiment 3

[0060] A bipolar copolymer blue light host material, namely poly{4'-n-eicosyloxy-N,N-bis(4-ylphenyl)aniline-co-2,6-dimethyl-4, 8-diylbenzo[1,2-d;4,5-d']bisoxazole} (n=91), denoted as copolymer P3, the structural formula is as follows:

[0061]

[0062] The preparation method comprises the following steps:

[0063] Compound A3 and Compound B3 are provided respectively:

[0064]

[0065] Under nitrogen protection, 4'-n-eicosyloxy-N,N-bis(4-pinacol borate phenyl)aniline (238mg, 0.3mmol), 2,6-dimethyl-4 ,8-Dibromobenzo[1,2-d;4,5-d']bisoxazole (114mg, 0.33mmol), palladium acetate (3.5mg, 0.015mmol) and tris(o-methoxyphenyl) Phosphine (21mg, 0.06mmol) was added into a flask containing 12mL of N,N-dimethylformamide, and after fully dissolving, potassium carbonate (3mL, 2mol / L) solution was added, and then nitrogen was vented into the flask to exhaust the air for about After 30 min, the flask was heated to 130 °C for 12 h in the following Suzuki coupling reaction:

[0066] ...

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Abstract

The invention provides a bipolar copolymer blue-light main material, a preparation method thereof and an organic electroluminescent device. The bipolar copolymer blue-light main material is a copolymer P with a general formula shown in the specification. In the general formula, R1 and R2 independently are C1-C20 alkyl, and n is an integer between 10 and 100. The bipolar copolymer blue-light main material contains both a triphenylamine unit with cavity delivery performance and a benzobisoxazole unit with electron delivery performance, and helps to realize carrier balance of the electroluminescent device, thereby solving the problem of low efficiency of the organic electroluminescent device. Also the provided bipolar copolymer blue-light main material is good in thermal stability and solubility and good in film forming performance, and is applicable to prepare organic electroluminescent devices.

Description

technical field [0001] The invention relates to the field of organic luminescent materials, in particular to a bipolar copolymer blue light host material, a preparation method thereof and an organic electroluminescent device. Background technique [0002] Since 1987, C.W.Tang et al. of Kodak reported for the first time that Alq 3 Since the double-layer device structure of light-emitting materials, organic electroluminescence has received great attention. Organic electroluminescence can be divided into fluorescence and phosphorescence electroluminescence. According to the spin quantum statistical theory, the formation probability ratio of singlet excitons and triplet excitons is 1:3, that is, singlet excitons only account for 25% of the "electron-hole pairs". Therefore, the fluorescence from the radiative transition of singlet excitons only accounts for 25% of the total input energy, while the electroluminescence of phosphorescent materials can utilize the energy of all exc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12H01L51/54
Inventor 周明杰王平张振华张娟娟
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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