Polymers, phosphorescent host materials and electroluminescent devices

A technology of electroluminescent devices and phosphorescent hosts, applied in phosphorescent host materials and electroluminescent devices, polymers with functional groups as side groups, and polymers to achieve high device efficiency

Active Publication Date: 2017-06-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current efficiency of organic electroluminescent devices using this compound is only 0.34cd / A@10.0V, which still needs to be further improved

Method used

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  • Polymers, phosphorescent host materials and electroluminescent devices
  • Polymers, phosphorescent host materials and electroluminescent devices
  • Polymers, phosphorescent host materials and electroluminescent devices

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0090]Preparation of 4-(diethoxy(methyl)silyl)-N,N-diphenylamine (abbreviated as monomer 1):

[0091]

[0092] Under argon atmosphere, 4-bromophenyl-N,N-diphenylamine (6 mmol) was dissolved in 200 mL of anhydrous THF. After the temperature in the bottle dropped to -78°C, 3.3 ml of n-butyllithium (2.2M in n-hexane solvent) was added dropwise within 15 minutes. The reaction was continued for half an hour while maintaining the system temperature, and then 1.5 g (8.9 mmol) of methyldiethoxychlorosilane was rapidly added dropwise. After the dropwise addition, the reaction was continued to gradually rise to room temperature, and then quenched with ammonium chloride solution. The reactant was extracted with ether, washed three times with water and dried over anhydrous magnesium sulfate. The filtrate was concentrated and subjected to silica gel column chromatography (petroleum ether:dichloromethane=6:1) to obtain a colorless oily product with a yield of 42%.

[0093] 1 H NMR (4...

preparation example 2

[0098] Preparation of (4-(diethoxy(methyl)silyl)phenyl)diphenylphosphine oxide (abbreviated as monomer 2):

[0099]

[0100] (4-Bromophenyl)-diphenylphosphine oxide (6 mmol) was dissolved in 200 mL of anhydrous THF under argon atmosphere. After the temperature in the bottle dropped to -78°C, 3.3 ml of n-butyllithium (2.2M in n-hexane solvent) was added dropwise within 15 minutes. The reaction was continued for half an hour while maintaining the system temperature, and then 1.5 g (8.9 mmol) of methyldiethoxychlorosilane was rapidly added dropwise. After the dropwise addition, the reaction was continued to gradually rise to room temperature, and then quenched with ammonium chloride solution. The reactant was extracted with ether, washed three times with water and dried over anhydrous magnesium sulfate. The filtrate was concentrated and subjected to silica gel column chromatography (petroleum ether:dichloromethane=6:1) to obtain a colorless oily product with a yield of 63%. ...

preparation example 3-4

[0106] The methyldiethoxychlorosilane of Preparation Example 1 or 2 is replaced by phenyldiethoxychlorosilane to obtain 4-(diethoxy(phenyl)silyl)-N,N-diphenylamine ( Abbreviated as monomer 3) (4-(diethoxy(phenyl)silyl)phenyl)diphenylphosphine oxide (abbreviated as monomer 4).

[0107] Monomer 3:

[0108] 1 H NMR (400MHz, CDCl 3 ,δ):0.37(s,3H,-CH 3 ), 1.27(t, J=7Hz, 6H; -OCH 2 CH 3 ), 3.86 (q, J=7Hz, 4H; -OCH 2 ), 7.06(d, J=8Hz, 4H; ArH), 7.13(d, J=7Hz, 4H; ArH), 7.32(m, 9H; ArH), 7.48(d, J=2Hz, 4H; ArH ).

[0109] 13 C NMR (400MHz, CDCl 3 ,δ): -1.9, 20.5, 60.5, 124.1, 125.3, 126.6, 129.4, 131.4, 136.5, 137.1, 148.5, 151.1.

[0110] 29 Si-NMR (400MHz, CDCl 3 ,δ): -17.2.

[0111] Elemental analysis theoretical value C28H29NO2Si: C, 76.50; H, 6.65; N, 3.19. Actual value: C, 76.43; H, 6.61; N, 3.12.

[0112] Monomer 4:

[0113] 1H NMR (400MHz, CDCl3, δ): 0.38 (s, 3H, -CH3), 1.33 (t, J = 7Hz, 6H; -OCH2CH3), 3.86 (q, J = 7Hz, 4H; -OCH2), 7.36 ( brs, 17H; Ar H), 7.68 ...

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PUM

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Abstract

The invention discloses a polymer, a phosphorescence host material and an electroluminescence device. The polymer of the present invention has polysiloxane as the main chain and functional groups with electron and hole transport properties as side groups. The polymer of the invention has higher triplet energy, can be used as a host material to be doped with other phosphorescent dyes, and can be widely used in large-area flexible flat panel displays, polymer light-emitting diodes and electronic imaging equipment.

Description

technical field [0001] The invention relates to a polymer, a phosphorescent host material and an electroluminescent device, in particular to a polymer with polysiloxane as the main chain and functional groups with electron and hole transport properties as side groups, Phosphorescent host materials and electroluminescent devices. Background technique [0002] Since Deng Qingyun (C. Tang and S. Van Slyke, Appl. Phys. Lett. 1987, 51, 913.) of Kodak Company prepared a double-layer organic light-emitting device by vacuum evaporation for the first time in 1987, the research of organic light-emitting diodes has entered the a whole new stage. In the past decade, organic light-emitting diodes have potential advantages in the fields of full-color displays and solid-state lighting due to their advantages of fast response, high brightness, and low operating voltage (Nature 1998, 395, 151; Nature 2006, 440, 908.). [0003] Manufacture of organic electroluminescent devices that meet the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/30C08L83/08H01L51/54
Inventor 任忠杰董杨孙殿明闫寿科
Owner BEIJING UNIV OF CHEM TECH
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