A kind of organic electroluminescent material and organic electroluminescent device

A technology of electroluminescent devices and light-emitting layers, applied in the fields of light-emitting materials, electro-solid devices, organic chemistry, etc., can solve the problems of unsatisfactory performance of blue-light OLED devices, and achieve excellent electroluminescent performance, high efficiency, improved The effect of the carrier recombination factor

Active Publication Date: 2019-10-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the development of green and red OLEDs, the device performance of blue OLEDs is still unsatisfactory.

Method used

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  • A kind of organic electroluminescent material and organic electroluminescent device
  • A kind of organic electroluminescent material and organic electroluminescent device
  • A kind of organic electroluminescent material and organic electroluminescent device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Preparation and properties of embodiment 1 luminescent material PyIPy

[0070] (1) Synthesis of 4,5-pyrene diquinone (PyDO): Dissolve elemental pyrene (2.80g, 14.0mmol) in a mixed organic solvent of 60mL dichloromethane and 60mL acetonitrile, and then NaIO 4 (12.30g, 57.3mmol), 80mL of deionized water was added to it, and finally the catalyst RuCl was added 3 ·xH 2 O (0.35g, 1.7mmol). The dark brown reaction was stirred at 20 °C for 12 hours. After the reaction was complete, the crude product was extracted with dichloromethane. The organic phase was dried with anhydrous magnesium sulfate for 6 hours and then filtered, and then the filtrate was spin-dried by a reduced-pressure rotary evaporator to obtain a dark orange solid, which was purified by column chromatography and separated by volume ratio petroleum ether:dichloromethane=1 :1 solvent as eluent. A red powder (1.21 g) was finally obtained with a yield of 36%.

[0071] 1 H NMR (500MHz, DMSO-d6, 25°C, δ): 8.34...

Embodiment 2

[0078] Example 2 Application of luminescent material PyIPy in organic electroluminescent devices

[0079] Device 1

[0080] This embodiment prepares blue organic electroluminescent device 1 according to the following method:

[0081]a) Preparation of substrate ITO (indium tin oxide) glass: ultrasonically clean each ITO glass with deionized water, isopropanol, acetone, toluene, acetone, trichloroethane, acetone, toluene, acetone, and isopropanol in sequence. For 30 minutes, put it in the oven to dry for later use. Before preparing the device, the surface of the ITO glass was treated for 40 minutes in an ultraviolet ozone cleaning machine, and then transferred into a vacuum evaporation equipment (pressure in the chamber-4 Pa);

[0082] b) On the anode ITO glass, the hole injection layer HATCN is vacuum evaporated, with a thickness of 6nm;

[0083] c) On the hole injection layer HATCN, a hole transport layer TAPC is vacuum evaporated with a thickness of 45nm;

[0084] d) On t...

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Abstract

An organic electroluminescence material and an organic electroluminescence device. The organic electroluminescent material of the present invention is a pyrene-imidazole organic electroluminescent material substituted by pyrene, has a structure of formula I, is a triplet-triplet fusion (TTA) material, has higher luminous efficiency, excellent Thermal stability, balanced carrier transport properties. The light-emitting layer of the electroluminescent device of the present invention comprises a host material and a guest material, and the host material and the guest material are TTA mechanism materials having a similar molecular structure, and the organic electroluminescent device provided by the present invention exhibits very high brightness And high external quantum efficiency under high brightness, showing great application potential.

Description

technical field [0001] The invention belongs to the field of organic electroluminescent materials, in particular to an organic electroluminescent material and an organic electroluminescent device with high efficiency and high brightness. Background technique [0002] An organic electroluminescent device (OLED) is a device prepared by spin-coating or vacuum evaporation deposition of a layer of organic material between two metal electrodes. A classic three-layer organic electroluminescent device includes a hole transport layer, emissive layer and electron transport layer. The holes generated by the anode are combined with the electrons generated by the cathode through the hole transport layer to form excitons in the light emitting layer through the hole transport layer, and then emit light. Organic electroluminescent devices can be adjusted to emit various required lights by changing the material of the light-emitting layer as required. [0003] As a new generation of flat-p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D235/02C09K11/06H01L51/54
CPCC09K11/06C07D235/02C09K2211/1044H10K85/622H10K85/6572
Inventor 路萍单通
Owner JILIN UNIV
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