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

A blue light host material and polymer technology, which can be used in chemical instruments and methods, semiconductor/solid-state device manufacturing, compounds of Group 5/15 elements of the periodic table, etc. Reduce the effect of process flow 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{9-(4-(9-phenyl-2,7-diyl-9H-fluorene)phenyl)-9H-carbazole -co-2,7-diyl-3,6-di(diphenylphosphineoxy)-9-n-hexyl-9H-carbazole}(P1) (where R is n-hexyl, n=36), 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, 9-(4-(9-phenyl-2,7-dipinacol borate-9H-fluorene)phenyl)-9H-carbazole (147mg, 0.2mmol), 2 , 7-dibromo-3,6-bis(diphenylphosphine oxide)-9-n-hexyl-9H-carbazole (162mg, 0.2mmol) was added to a flask containing 10ml of toluene solvent, and potassium carbonate was dissolved fully (2mL, 2mol / L) solution was added to the flask, vacuum deoxygenated and filled with argon, then bistriphenylphosphine palladium dichloride (5.6mg, 0.008mmol) was added; the flask was heated to 100°C for Suzuki Coupling reaction 48h. Subsequently, th...

Embodiment 2

[0035] Example 2: The bipolar polymer blue light host material of this example, that is, poly{9-(4-(9-phenyl-2,7-diyl-9H-fluorene)phenyl)-9H-carbazole -co-2,7-diyl-3,6-bis(diphenylphosphine oxygen)-9-n-eicosyl-9H-carbazole} (P2) (wherein, R is n-eicosyl, n=92), 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 a mixed gas of nitrogen and argon, 9-(4-(9-phenyl-2,7-dipinacol borate-9H-fluorene)phenyl)-9H-carbazole (220mg, 0.3mmol ), 2,7-dibromo-3,6-bis(diphenylphosphineoxy)-9-n-eicosyl-9H-carbazole (302mg, 0.3mmol) and 15mL tetrahydrofuran were added to a 50mL two-necked bottle After fully dissolving, the mixed gas of nitrogen and argon was introduced to exhaust the air for about 20 minutes, and the two-necked bottle was added to 70°C for Suzuki coupling reaction for 96 hours. Subsequently, the polymerization reac...

Embodiment 3

[0042] Example 3: The bipolar polymer blue light host material of this example, that is, poly{9-(4-(9-phenyl-2,7-diyl-9H-fluorene)phenyl)-9H-carbazole -co-2,7-diyl-3,6-bis(diphenylphosphineoxy)-9-methyl-9H-carbazole}(P3) (where R is methyl, n=78), which The 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, 9-(4-(9-phenyl-2,7-dipinacol borate-9H-fluorene)phenyl)-9H-carbazole (220mg, 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) was added to a flask containing 12mL of N,N-dimethylformamide, and after fully dissolving, potassium carbonate (3mL, 2mol / L) solution was added, and then nitrogen was passed into the flask to exhaust the air After about 30 min; the flask was heated to 130° ...

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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 R represents 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): C08G61/12C07F9/6558H01L51/54
Inventor 周明杰张振华王平黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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