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Organic light emitting device

A technology of organic light-emitting devices and organic substances, which is applied in the fields of electrical solid-state devices, semiconductor devices, semiconductor/solid-state device manufacturing, etc., and can solve problems such as shortened lifespan, single types of light extraction materials, and unsatisfactory effects

Inactive Publication Date: 2018-12-11
CHANGCHUN HYPERIONS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the types of light extraction materials are relatively single at present, and the effect is not ideal; in addition, because the transport speed of electrons is lower than that of holes, the carrier mismatch in the light-emitting layer will affect the reduction of device efficiency and lifespan. shorten

Method used

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Experimental program
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preparation example Construction

[0127] The preparation of the cover layer can be any one of 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. In the present invention, the method of vacuum evaporation is preferably used.

[0128] 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

[0131] [Example 1] Synthesis of Compound 1-1

[0132]

[0133] Step1: add benzidine-compound f (1.35g, 8mmol), compound 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 After drying, the organic matter was concentrated, subjected to column chromatography, and recrystallized to obtain intermediate 1-b (1.61 g, 75%).

[0134] Step2: Add compound a (1.53g, 8mmol), (3.15g, 17.5mmol) of N-bromosuccinimide and (0.5g, 2.7mmol) of p-toluenesulfonic acid in the reactor and dissolve them in 30ml of acetonitrile , and 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 b. Take compound b (1.80g, 6.67mmol) and methyl bromide c (0.76g, 8mmol), add potassium tert-butoxide (2.83g, 2...

Embodiment 2

[0139] [Example 2] Synthesis of Compound 1-3

[0140] Compound 1-3 (3.86 g, 62%) was obtained according to the synthesis method of compound 1-1.

[0141] 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 organic light emitting device, which relates to the technical field of organic electroluminescence. The compound of the general formula I is used as a hole transport layer and the compound of the general formula II is used as a capping layer, thereby obtaining an organic light emitting device according to the invention. The compound of the general formula I is used as ahole transport layer and the compound of the general formula II as a capping layer. As that clad material and the hole transport layer material of the present invention are use, At that same time, thedrive voltage of the device can be effectively reduce, and the problems of low luminous efficiency, short service life and high drive voltage exist in the prior art can be solved, and organic light emitting device is the OLED material with excellent performance.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence, in particular to an organic light emitting 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. However, the development of optical extraction materials (Capping Layer) has always been concerned by everyone. The light extraction layer is a very important functional layer in the OLED, s...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/52H01L51/54
CPCH10K85/60H10K50/15H10K50/858
Inventor 韩春雪周雯庭
Owner CHANGCHUN HYPERIONS TECH CO LTD
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