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Bipolar polymer blue light host material, preparation method and applications thereof

A blue light host material and polymer technology, which can be used in luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., can solve problems such as low luminous efficiency, and achieve the effects of cheap raw materials, good solubility and novel structure

Inactive Publication Date: 2015-04-15
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 luminous efficiency of this phosphorescent material is low

Method used

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  • Bipolar polymer blue light host material, preparation method and applications thereof
  • Bipolar polymer blue light host material, preparation method and applications thereof
  • Bipolar polymer blue light host material, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: The bipolar polymer blue light host material of this example, that is, poly{N-(4'-n-hexyloxyphenyl)-2,7-diylcarbazole-co-2,7-diyl -3,6-bis(diphenylphosphineoxy)-9-n-hexyl-9H-carbazole} (P1) (wherein, R 1 , R 2 Both are n-hexyl groups, n=41), and its structural formula is as follows:

[0028]

[0029] The preparation steps of above-mentioned polymer are as follows:

[0030] The reaction formula is as follows:

[0031]

[0032] Under argon protection, N-(4'-n-hexyloxyphenyl)-2,7-dipinacol ester carbazole (119 mg, 0.2 mmol), 2,7-dibromo-3,6-di Add (diphenylphosphineoxy)-9-n-hexyl-9H-carbazole (162mg, 0.2mmol) into a flask containing 10ml of toluene solvent, and after fully dissolving, add potassium carbonate (2mL, 2mol / L) solution into the flask , deoxygenated under vacuum and filled with argon, then added bistriphenylphosphinepalladium dichloride (5.6mg, 0.008mmol); the flask was heated to 100°C for Suzuki coupling reaction for 48h. Subsequently, the...

Embodiment 2

[0035] Example 2: The bipolar polymer blue light host material of this example, that is, poly{N-(4'-methoxyphenyl)-2,7-diylcarbazole-co-2,7-diyl -3,6-bis(diphenylphosphineoxy)-9-n-eicosyl-9H-carbazole} (P2) (wherein, R 1 is methyl, R 2 is n-eicosyl, n=100), its structural formula is as follows:

[0036]

[0037] The preparation steps of above-mentioned polymer are as follows:

[0038] The reaction formula is as follows:

[0039]

[0040] Under the protection of mixed gas of nitrogen and argon, N-(4'-methoxyphenyl)-2,7-dipinacol ester carbazole (158mg, 0.3mmol), 2,7-dibromo-3, Add 6-bis(diphenylphosphineoxy)-9-n-eicosyl-9H-carbazole (302mg, 0.3mmol) and 15mL tetrahydrofuran into a 50mL two-necked bottle, fully dissolve and pass nitrogen and argon After the mixture was exhausted for about 20 minutes, tetrakistriphenylphosphine palladium (4mg, 0.003mmol) was added into it, and after fully dissolved, sodium bicarbonate (3mL, 2mol / L) solution was added. Then, the mixed g...

Embodiment 3

[0042]Example 3: The bipolar polymer blue light host material of this example, that is, poly{N-(4'-n-eicosyloxyphenyl)-2,7-diylcarbazole-co-2,7 -diyl-3,6-bis(diphenylphosphineoxy)-9-methyl-9H-carbazole} (P3) (wherein, R 1 is n-eicosyl, R 2 is methyl, n=75), its structural formula is as follows:

[0043]

[0044] The preparation steps of above-mentioned polymer are as follows:

[0045] The reaction formula is as follows:

[0046]

[0047] Under nitrogen protection, N-(4'-n-eicosyloxyphenyl)-2,7-dipinacol ester carbazole (238mg, 0.3mmol), 2,7-dibromo-3,6- Bis(diphenylphosphineoxy)-9-methyl-9H-carbazole (244mg, 0.33mmol), palladium acetate (3.5mg, 0.015mmol) and tris(o-methylphenyl)phosphine (21mg, 0.06mmol) Add it into a flask containing 12mL of N,N-dimethylformamide, dissolve it fully, add potassium carbonate (3mL, 2mol / L) solution, and then pass nitrogen into the flask and exhaust the air for about 30min; heat the flask to Suzuki coupling reaction was carried out at...

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Abstract

The invention belongs to the field of organic electroluminescent materials, and discloses a bipolar polymer blue light host material, a preparation method and applications thereof. The structural formula of the host material is shown in the description, wherein in the formula, the R1 and R2 both represent a C1-C20 alkyl group, and the n represents an integer in a range of 10 to 100. In the provided bipolar polymer blue light host material, the diphenyl phosphine oxide contains an electron-absorbing structure P=O, which is a good electron transmission unit; the carbazole is an important electroluminescent material, and has an excellent hole transmission performance, and the nitrogen atom of carbazole can be modified by an alkyl group so as to improve the solubility and film-forming performance of copolymerized carbazole. Diphenyl phosphine oxide is introduced into the main chain of carbazole based polymer to achieve the carrier balance of electroluminescent devices so as to improve the luminescent efficiency of organic electroluminescent devices.

Description

technical field [0001] The invention relates to the field of organic electroluminescent materials, in particular to a bipolar polymer blue light host material and its preparation method and application. 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 excitons, so it has greate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12C09K11/06H01L51/54
Inventor 周明杰张振华王平黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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