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Poly-carbazole based conjugated polyelectrolyte photoelectric material and applications thereof in OLED (organic light emitting diode) devices

A conjugated polyelectrolyte, optoelectronic material technology, applied in the direction of electric solid devices, electrical components, semiconductor devices, etc., can solve the problem of reducing the life and stability of OLED devices, low electrical conductivity, and PVK hole injection/transport performance. Good and other problems, to achieve the effect of favorable injection and transmission, high conductivity

Inactive Publication Date: 2015-05-20
杜进文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, PEDOT:PSS is the most commonly used, but PEDOT:PSS is actually an acidic solution, which has a certain corrosion effect on the ITO anode, so using PEDOT:PSS as the hole injection layer will reduce the life and stability of OLED devices.
Since PVK is a non-conjugated polymer with a main chain, its electrical conductivity is not high, so the hole injection / transport performance of PVK is not very good, which is also one of the unfavorable factors affecting the performance of OLED devices.

Method used

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  • Poly-carbazole based conjugated polyelectrolyte photoelectric material and applications thereof in OLED (organic light emitting diode) devices
  • Poly-carbazole based conjugated polyelectrolyte photoelectric material and applications thereof in OLED (organic light emitting diode) devices
  • Poly-carbazole based conjugated polyelectrolyte photoelectric material and applications thereof in OLED (organic light emitting diode) devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of 4,4-dibromo-2-nitrobiphenyl (1)

[0023] Dissolve 4,4-dibromobiphenyl (20g, 64mmol) in glacial acetic acid (300mL), heat and stir at 110℃, add concentrated nitric acid (70%, 132mL) dropwise to glacial acetic acid, and heat for 6h until the solid is slow Dissolve slowly, then cool to room temperature. The reaction solution was filtered, the solid was washed with water, and then recrystallized from ethanol to obtain a yellow solid (17.6g, yield77%). 1 H-NMR (300MHz, CDCl 3 ): (ppm) 8.32 (d, 2H), 8.29 (d, 2H), 7.77 (dd, 2H).

Embodiment 2

[0025] Preparation of 2,7-dibromocarbazole (2)

[0026] The triethyl phosphate (60 mL) added with compound 1 (16.5 g, 46.1 mmol) was heated to reflux for 18 h under the protection of nitrogen. The reaction solution was distilled under reduced pressure to remove excess solvent, the residue was dissolved in a small amount of dichloromethane, and then precipitated with petroleum ether to obtain the initial product, and then silica gel / petroleum ether column chromatography was used to obtain a white solid (9.28g, yield 62%). 1 H-NMR(300MHz, CDCl 3 ): δ(ppm) 8.20 (br, 1H, NH); 7.92 (d, 2H); 7.56 (d, 2H); 7.35 (dd, 2H).

Embodiment 3

[0028] Preparation of p-methylphenyl-1-bromo-6-hexyl ether (3)

[0029] Add p-methylphenol (28g), 1,6-dibromohexane (220mL), potassium carbonate (60g), tetrabutylammonium bromide (3.8g) and acetone (150mL) to a 500mL flask, and stir to reflux with heating 48h. The reaction is cooled to room temperature, filtered, and the filtrate is rotated with a circulating water pump until the quality is no longer reduced, and then distilled under reduced pressure with an oil pump. The 210℃~220℃ fraction is collected as a colorless oily product (53.5g, yield 76.1%). 1 H-NMR(300MHz, CDCl 3 ): δ (ppm) 7.10 (d, 2H); 6.82 (d, 2H); 3.96 (t, 2H); 3.45 (t, 2H); 2.32 (s, 3H); 1.8 (br, 8H).

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Abstract

The invention discloses a poly-carbazole based conjugated polyelectrolyte photoelectric material and applications thereof in OLED (organic light emitting diode) devices. Through introducing the poly-carbazole based conjugated polyelectrolyte photoelectric material as a hole injection layer material into an OLED device, the performance of the OLED device is greatly improved.

Description

technical field [0001] The invention relates to the field of organic semiconductor photoelectric materials, in particular to a polycarbazole-based conjugated polyelectrolyte photoelectric material and its application in a hole injection layer of an OLED device. Background technique [0002] like figure 1 As shown, the OLED device is mainly composed of a cathode 1, a light-emitting layer 2, a hole injection layer (HIL) 3, an anode 4, and a substrate 5 sequentially stacked, and a power source 6 is connected to the cathode 1 and the anode 4. The light-emitting layer 2 is an organic material. When preparing an OLED device, indium tin oxide (ITO) is usually set on the substrate 5 as the anode 4, and then the hole injection layer (HIL) 3 is set on the ITO anode 4, and then the light emitting layer is set on the hole injection layer 3. layer 2, and finally a metal cathode 1 is vapor-deposited on the light-emitting layer 2, for example, a layer of CsF and a layer of metal Al are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G61/12C07D209/86H01L51/54
Inventor 不公告发明人
Owner 杜进文
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