OLED (organic light-emitting device)

An electroluminescent device, an organic technology, applied in the direction of electric solid-state devices, electrical components, luminescent materials, etc., can solve the problems of device performance degradation, shortened life, and device efficiency reduction, so as to reduce the driving voltage and improve production and utilization. , Improve the effect of compound rate

Inactive Publication Date: 2018-10-16
CHANGCHUN HYPERIONS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the transport velocity of electrons is lower than that of holes, the carriers in the light-emitting layer are not matched, resulting in a significant decline in device performance, which affects the reduction in device efficiency and the shortening of life.

Method used

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  • OLED (organic light-emitting device)
  • OLED (organic light-emitting device)
  • OLED (organic light-emitting device)

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0108] The preparation of organic electroluminescent devices can be carried out in vacuum evaporation method, spin coating method, vapor deposition, blade coating method, laser thermal transfer printing, electrospray coating method, slit coating method and dip coating method. Any of them, the method of vacuum evaporation is preferably used in the present invention.

[0109] The organic light-emitting device of the present invention can be widely used in the fields of panel display, lighting source, flexible OLED, electronic paper, organic photoreceptor or organic thin film transistor, signboard, signal lamp and the like.

Embodiment 1

[0112] [Example 1] Synthesis of Compound 1-1

[0113]

[0114] Step1: Add benzidine-compound 1-1-f (1.35g, 8mmol), compound 1-1-g (1.55g, 6.67mmol), Pd in ​​the reactor 2 (dba) 3 (0.17g, 0.2mmol), P(t-Bu) 3 (0.14, 0.67mmol), NaOt-Bu (2.24g, 20mmol), 100mL toluene solution, reacted at 100°C for 24h, extracted the organic phase with ether and water after the reaction, and used MgSO 4 Dry, concentrate the organic matter, go through column chromatography, and recrystallize to obtain intermediate 1-1-1 (1.61 g, 75%).

[0115] Step2: N-bromosuccinimide of compound 1-1-a (1.53g, 8mmol), (3.15g, 17.5mmol) and p-toluenesulfonic acid (0.5g, 2.7mmol) were added to the reactor and dissolved in In 30ml of acetonitrile, stirred at 50°C for about 12 hours. Cool to room temperature, depressurize, filter to collect crystals, and then wash with methanol to obtain compound 1-1-b. Take compound 1-1-b (1.80g, 6.67mmol) and methyl bromide 1-1-c (0.76g, 8mmol), add potassium tert-butoxide (2...

Embodiment 2

[0120] [Example 2] Synthesis of Compound 1-3

[0121] Compound 1-3 (3.86 g, 62%) was obtained according to the synthesis method of compound 1-1.

[0122] Mass Spectrum m / z: 741.32 (calculated: 741.31). Theoretical element content (%)C 55 h 39 N 3 : C, 89.04; H, 5.30; N, 5.68 Measured element content (%): C, 89.05; H, 5.30; N, 5.67. The above results confirmed that the obtained product was the target product.

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PUM

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Abstract

The invention discloses an OLED (organic light-emitting device) and relates to the technical field of organic light-emitting. The OLED is obtained from the compound in the general formula I as a holetransport layer and the compound in the general formula II as an electron transport layer. By means of an electron transport layer material and a hole transport layer material, electron migration speed of the electron transport layer can be increased, and the probability of carrier injection and recombination in the light emitting layer is increased by properly adjusting the hole transport layer,so that light-emitting efficiency of the device is increased and the service life of the device is prolonged; the driving voltage of the OLED can also be effectively reduced, and the problems of low light-emitting efficiency, short service life and high driving voltage in the prior art are solved; the materials are OLED material with excellent performance.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence, in particular to an organic electroluminescence device. Background technique [0002] In 1987, Tang et al. of Kodak Company invented a sandwich-type organic double-layer thin-film light-emitting device. This breakthrough made people see the huge potential of OLED technology to be practical and commercialized, and set off a research boom of organic light-emitting diodes. Over the past 30 years, OLED technology has achieved rapid development, and has moved from laboratory research to industrial production. [0003] At present, the development of OLED materials has reached a relatively mature stage, and material companies at home and abroad provide hundreds of innovative materials for selection. Organic charge transport materials are a class of organic semiconductor materials that can achieve controllable directional and ordered migration of carriers under the action of an elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/56C07D209/88C07D401/12C07D405/12C07D409/12C07D333/76C07D307/91C07C211/61C07D495/16C09K11/06H01L51/50H01L51/54
CPCC09K11/06C07C211/61C07D209/56C07D209/88C07D307/91C07D333/76C07D401/12C07D405/12C07D409/12C07D495/16C09K2211/1092C09K2211/1088C09K2211/1059C09K2211/1014C09K2211/1011C09K2211/1007C09K2211/1029C09K2211/1044H10K85/622H10K85/624H10K85/636H10K85/626H10K85/633H10K85/615H10K85/631H10K85/654H10K85/6576H10K85/6574H10K85/657H10K85/6572H10K50/15H10K50/16
Inventor 韩春雪周雯庭
Owner CHANGCHUN HYPERIONS TECH CO LTD
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