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Organic electroluminescent component

An electroluminescence element and electroluminescence technology, which are applied in electrical elements, organic semiconductor devices, electric solid devices, etc., can solve the problem of narrowing the energy gap bandwidth of the host material of the light-emitting layer, low hole injection and transmission efficiency, and blue light device luminous efficiency. Low problems, to achieve the effect of easy injection and transmission, easy charge dispersion, and not easy to crystallize

Inactive Publication Date: 2018-11-23
CHANGCHUN HYPERIONS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, research on organic light-emitting materials has been widely carried out in academia and industry, and a large number of small-molecule organic light-emitting materials with excellent performance have been developed one after another. Overall, the future direction of OLEDs is to develop high-efficiency, high-brightness, long-life, Low-cost white light devices and full-color display devices, but the industrialization process of this technology still faces many key problems, such as unbalanced carrier injection, low device life, low luminous efficiency of blue light devices, and unstable light color. Under technical conditions, during the process of hole injection and transport, due to the high energy barrier, the hole injection and transport efficiency is low, which further causes the energy gap bandwidth of the main material of the light-emitting layer to be further narrowed, and finally causes the driving force in the device. High voltage, unbalanced carrier injection, low luminous efficiency, especially the luminous efficiency of blue light devices; and although small molecule organic light-emitting materials are simple to prepare and easy to purify, their structures generally have small steric hindrance and small molecular weight, so they are not It is easy to form a film and has poor thermal stability, which eventually leads to low device life and unstable light color

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] [Example 1] Synthesis of compound HT5

[0108]

[0109] Step1: Under argon protection, add 5-chloro-1H-indole-2-boronic acid (10.2g, 52.3mmol), iodobenzene (21.3g, 104.7mmol), CuI (5g, 26.2mmol) to the reaction flask successively ), ethylenediamine (1.8ml, 26.2mmol), Cs 2 CO 3 (51.2g, 157.0mmol) and toluene (250ml), the reaction mixture was stirred for one day. The organic phase was extracted with ethyl acetate, the organic phase was concentrated and purified by column chromatography to obtain intermediate a-1 (7.1 g, 50%).

[0110] Step2: Under argon protection, add 8-bromo-1-naphthylamine (13.3g, 60.0mmol), compound a-1 (17.9g, 66mmol), NaOH (7.2g, 180mmol), Pd to the reaction flask in sequence (PPh 3 ) 4 (3.47g, 3mmol) and THF / H 2 O (80ml / 40ml), the reaction mixture was stirred at 80°C for 12 hours. After the reaction was completed, it was cooled to room temperature, extracted with toluene, and the organic phases were combined. The organic phase was washed w...

Embodiment 2

[0117] [Example 2] Synthesis of compound HT61

[0118] Compound HT61 (6.4 g, 72%) was obtained according to the synthetic method of compound HT5.

Embodiment 3

[0119] [Example 3] Synthesis of compound HT109

[0120] Compound HT109 (5.4 g, 69%) was obtained according to the synthetic method of compound HT5.

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Abstract

The invention provides an organic electroluminescent component, and relates to the technical field of organic electroluminescence. According to the organic electroluminescent component, a hole transport layer of a specific chemical structure is matched with a luminescent layer main body material, so that the energy barrier between an anode and a luminescent layer is reduced, the balance of carrierinjection is realized, the drive voltage of the organic electroluminescent component is reduced effectively, the luminous efficiency and photochromic stability of the device are improved, the servicelife of the device is prolonged, and the problems of short service life, low luminous efficiency and photochromic instability caused by the unbalance of carrier injection inside the organic electroluminescent component are solved effectively.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence, in particular to an organic electroluminescence element. Background technique [0002] Organic electroluminescence is low-voltage, high-current injection luminescence. Because it has the properties of a light-emitting diode, it is usually called an organic electroluminescence diode (OLED). Entering the electron transport layer, holes enter the hole transport layer from the anode, holes and electrons recombine in the light-emitting layer to form excitons, and the excitons radiatively transition back to the ground state and emit light. The light-emitting process can be summarized as four steps: (1) Injection of carriers, (2) transport of carriers in the organic layer, (3) recombination of positive charge carriers to form excitons, (4) radiative transition of excitons to emit light. [0003] The structure of a typical organic electroluminescent device generally includes a cathod...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54
CPCH10K85/649H10K50/12H10K50/15H10K2101/30
Inventor 董秀芹孙敬
Owner CHANGCHUN HYPERIONS TECH CO LTD
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