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Bipolar copolymer host material as well as preparation method and application thereof

A bipolar copolymer and host material technology, applied in the manufacture of semiconductor/solid-state devices, electric solid-state devices, semiconductor devices, etc., can solve the problems of complex synthesis, harsh preparation conditions, etc., and achieve easy availability of raw materials, low cost of raw materials, Good dissolving properties

Inactive Publication Date: 2014-05-21
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 host material as well as preparation method and application thereof
  • Bipolar copolymer host material as well as preparation method and application thereof
  • Bipolar copolymer host material as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0035] see figure 1 , the preparation method of the bipolar copolymer host material of an embodiment, comprises the following steps:

[0036] Step S10, respectively provide raw material A and raw material B as shown below:

[0037] Among them, R is selected from C 1 ~C 20 alkyl.

[0038] Raw materials A and B are products produced by Bailingwei Technology Co., Ltd.

[0039] Step S20, under the atmosphere of protective gas, mix raw material A and raw material B with a molar ratio of 1:1~1.2, catalyst, alkali solution and organic solvent evenly, react at 70°C~130°C for 12h~96h, and separate After purification, a bipolar copolymer host material with the following structural formula is obtained:

[0040]

[0041] Wherein, n is an integer of 10-100.

[0042] Preferably, the reaction temperature is 90°C-120°C, and the reaction time is 24h-72h.

[0043] The shielding gas can be argon, nitrogen or a mixture of nitrogen and argon.

[0044] The organic solvent may be at lea...

Embodiment 1

[0070] Poly{2,7-diyl-9-(2'-yl-9'-phenylcarbazole)-9-(4'-n-hexyloxyphenyl)fluorene-co-3,8-diyl- Preparation of 1,10-phenanthroline} (referred to as P1).

[0071] The above-mentioned bipolar copolymer host material P1 is prepared according to the following reaction formula:

[0072]

[0073] 167mg of 2,7-dipinacol borate-9-(2'-yl-9'-phenylcarbazole)-9-(4'-n-hexyloxyphenyl)fluorene (0.2mmol) , 68mg of 3,8-dibromo-1,10-phenanthroline (0.2mmol) was added in a flask filled with 10mL of toluene solvent, and after fully dissolving, 2mL of potassium carbonate solution (2mol / L) was added into the flask, Evacuate oxygen and fill with argon, then add 5.6 mg of bistriphenylphosphine palladium dichloride (0.008 mmol), and carry out Suzuki coupling reaction at 100° C. for 48 h. After the reaction, the solution in the flask was cooled to room temperature, 50mL of methanol was added dropwise to the flask for sedimentation, filtered to obtain a precipitate, and the obtained precipitate was...

Embodiment 2

[0077] Poly{2,7-diyl-9-(2'-yl-9'-phenylcarbazole)-9-(4'-methoxyphenyl)fluorene-co-3,8-diyl-1 , 10-phenanthroline} (abbreviated as P2) preparation.

[0078] The above-mentioned bipolar copolymer host material P2 is prepared according to the following reaction formula:

[0079]

[0080] 230mg of 2,7-dipinacol borate-9-(2'-yl-9'-phenylcarbazole)-9-(4'-methoxyphenyl)fluorene (0.3mmol), Add 101mg of 3,8-dibromo-1,10-phenanthroline (0.3mmol) and 15mL of tetrahydrofuran into a 50mL two-necked bottle, fully dissolve and then pass in a mixture of nitrogen and argon to exhaust the air for about 20 minutes. Then, 4 mg of tetrakistriphenylphosphine palladium (0.003 mmol) was added into the two-neck flask, and after fully dissolving, 3 mL of sodium bicarbonate solution (2 mol / L) was added. Then the mixed gas of nitrogen and argon was exhausted for about 10 minutes, and the Suzuki coupling reaction was carried out at 70°C for 96 hours. After the reaction, cool the solution in the two-...

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Abstract

The invention provides a bipolar copolymer host material as well as a preparation method and application thereof. The bipolar copolymer host material has a structural formula shown in the specification; in the structural formula, R is selected from C1-C20 alkyls and n is an integer from 10 to 100. The bipolar copolymer host material has the beneficial effects that the bipolar copolymer host material contains a carbazole-fluorenyl main polymer chain and a phenanthroline unit, wherein the phenanthroline unit contains two nitrogen atoms, is an excellent electron transport unit and has good rigidity and planarity and good thermal stability; fluorene is a plane biphenyl structure which has high rigidity; therefore, a fluorene structured compound also has high thermal stability; the ninth bit of fluorene is modified with carbazole and phenyl, thus improving the hole transport property and triplet state energy level of fluorene; carrier balance of electroluminescent devices is achieved by introducing phenanthroline onto the carbazole-fluorenyl main polymer chain, thus solving the problem of low efficiency of organic electroluminescent devices.

Description

technical field [0001] The invention relates to the field of organic electroluminescent materials, in particular to a bipolar copolymer host material and its preparation method and application. Background technique [0002] Since C.W.Tang et al. of Kodak Company reported for the first time in 1987 that a double-layer device structure using Alq3 as a light-emitting material was prepared by evaporation, organic electroluminescence has attracted 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...

Claims

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Application Information

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