Organic light-emitting display device and display device

An electroluminescent device and luminescent technology, applied in the direction of electric solid state devices, electrical components, semiconductor devices, etc., can solve the problems that can no longer meet the needs

Active Publication Date: 2020-07-10
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The light-emitting layer in organic electroluminescent display devices usually includes host materials and guest materials. At present, fluorescent guest materials are mainly used with a single host material. With the increasing requirements for luminous efficiency and lifetime, existing materials can no longer To meet the demand, it is urgent to develop new light-emitting layer materials

Method used

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  • Organic light-emitting display device and display device
  • Organic light-emitting display device and display device
  • Organic light-emitting display device and display device

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example

[0068] Receptor molecule synthesis method:

[0069] Under nitrogen protection, 3-bromo-9-phenylcarbazole (7.5mmol), 9,10-dihydroacridine (13.5mmol), tris(dibenzylideneacetone)-dipalladium (0.8mmol), A mixture of sodium tert-butoxide (35 mmol) and tri-tert-butylphosphine tetrafluoroborate (0.96 mmol) was placed in a three-necked flask filled with 200 mL of toluene and stirred at a temperature of 80-105° C. for 12 h. A mixture of ice and water was added to quench the reaction. After room temperature, the compound 1-17 was purified by vacuum filtration, followed by column chromatography and dried in vacuum. Yield: 85%.

[0070] The molecular weight obtained by mass spectrometry: 1050.69.

[0071] Receptor compound synthesis method:

[0072] Under nitrogen, 2-chloro-4,6-bis(3,5-di-tert-butylphenyl)-1,3,5-triazine (15 mmol), 2,8-diboronate diphenyl And furan (7.2mmol), Pd (pph3) 4 (0.2mmol), K 2 CO 3 Put into 100mL tetrahydrofuran THF and stir and reflux at 80°C overnight. A...

Embodiment 1

[0080] The preparation method of the organic electroluminescent device in this embodiment can be carried out according to the following steps:

[0081] ①In a vacuum of 1×10 -5 Under the condition of Pa, an indium tin oxide (ITO) thin film with a film thickness of 100 nm was deposited on a glass substrate as an anode 1 by a vacuum evaporation method.

[0082] ② Afterwards, compound A was vapor-deposited on the anode with a film thickness of 5 nm to form a hole injection layer (HIL) 2 .

[0083] ③ On the hole injection layer 2, the compound B was subsequently vapor-deposited to a film thickness of 160 nm to function as the first hole transport layer (HTL-1) 3 .

[0084] ④ On the first hole transport layer film, compound C was vapor-deposited to a film thickness of 10 nm to function as the second hole transport layer (HTL-2) 4 .

[0085] ⑤ Co-evaporating compound 1-20 of the present application, compound 2-17 of the present application, and compound D (guest material) on the se...

Embodiment 2

[0092] Except that when forming the light-emitting layer, the compound 2-18 of the present application was used instead of the compound 2-17 in the above-mentioned Example 1, and the organic electroluminescent device was fabricated by the same method as above.

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Abstract

The invention provides an organic light-emitting display device and a display device. A light-emitting layer of the display device comprises a compound shown in the chemical formula 1 and a compound shown in the chemical formula 2. The two compounds form an exciplex with a TADF mechanism, and the exciplex is used as a light-emitting layer main body material, so that the quantum efficiency of the light-emitting device can be improved.

Description

technical field [0001] The present application relates to the field of display technology, in particular, to an organic electroluminescent display device and a display device. Background technique [0002] Organic electroluminescent display (OLED), as a new generation of display technology, has the advantages of ultra-thin, self-luminous, wide viewing angle, fast response, high luminous efficiency, good temperature adaptability, simple production process, low driving voltage, low energy consumption, etc. It has been widely used in industries such as flat panel display, flexible display, solid state lighting and vehicle display. [0003] The light-emitting layer in organic electroluminescent display devices usually includes host materials and guest materials. At present, fluorescent guest materials are mainly used with a single host material. With the increasing requirements for luminous efficiency and lifetime, existing materials can no longer To meet the demand, it is urge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/54
CPCH10K85/649H10K85/633H10K85/631H10K85/615
Inventor 刘兴华张晓晋
Owner BOE TECH GRP CO LTD
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