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Organic light-emitting material with bithiophene pentalene derivative structure and organic light-emitting device of organic light-emitting material

A technology of dithienocyclopentadiene and luminescent materials, which is applied in luminescent materials, organic chemistry, electric solid-state devices, etc., and can solve the problems that the device efficiency cannot be effectively improved, the life of the screen is reduced, and the exciton recombination rate is low. , achieve excellent electrochemical performance and thermal stability, overcome carrier imbalance, and solve the effect of low electron injection rate

Inactive Publication Date: 2017-08-18
CHANGCHUN HYPERIONS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most notable problems are: the efficiency of blue pixels and the relative short lifespan
Blue pixels may also reduce the life of the screen
The low efficiency of the blue pixel is mainly caused by the low electron injection rate in the light-emitting layer. As we all know, in organic photoelectric materials, the hole transport performance is better than electrons, and the electron mobility is slower than the hole mobility, resulting in the electron injection rate in the light-emitting layer. Lower than the hole injection rate, the exciton recombination rate is low, this phenomenon is more obvious in blue organic light-emitting materials
Most blue light materials have the characteristics of wide band gap and low electron affinity, resulting in less electron injection, so that the efficiency of the device cannot be effectively improved. Therefore, blue organic light-emitting materials with high electron affinity and electron transport capabilities are designed, As well as functional materials such as electron transport and injection, it is very important to enhance the performance of the device

Method used

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  • Organic light-emitting material with bithiophene pentalene derivative structure and organic light-emitting device of organic light-emitting material
  • Organic light-emitting material with bithiophene pentalene derivative structure and organic light-emitting device of organic light-emitting material
  • Organic light-emitting material with bithiophene pentalene derivative structure and organic light-emitting device of organic light-emitting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] [Example 1] Synthesis of Compound 1

[0042]

[0043] *Synthesis of Intermediate 1-1

[0044] Add 4-H-cyclopentadienedithiophene (1.92g, 10.8mmol), 50mL of DMSO, bromoethane (2.44g, 22.4mmol), KI (0.05g, 0.30mmol) into the reactor. Under the conditions of nitrogen purging and ice bath, 2 g of finely ground KOH powder was added, and then the mixture was stirred and reacted at room temperature for 24 h, and then 50 mL of water was added to the reactor in an ice bath, and the organic phase was extracted twice with diethyl ether, After washing with water, brine and ammonium chloride, MgSO 4 After drying, the solvent was distilled off, and the crude product was purified by silica gel column chromatography to obtain compound 1-1 (2.12 g, 86%).

[0045] *Synthesis of Intermediate 1-2

[0046] In the absence of nitrogen, 1-1 (2.34g, 10.0mmol), 60mL of DMF solution, 60mL of glacial acetic acid, 50mL of chloroform were added to the reactor, NBS (4.44g, 25.0mmol) was added, ...

Embodiment 2

[0056] [Example 2] Synthesis of Compound 8

[0057] According to the synthetic method of compound 1, compound 8 (3.56 g, 52%) was obtained.

[0058]

Embodiment 3

[0059] [Example 3] Synthesis of compound 20

[0060] According to the synthetic method of compound 1, compound 20 (3.26 g, 57%) was obtained.

[0061]

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PUM

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Abstract

The invention discloses an organic light-emitting material with a bithiophene pentalene derivative structure and an organic light-emitting device of the organic light-emitting material, and belongs to the technical field of organic photoelectric materials. According to the organic light-emitting material with the bithiophene pentalene derivative structure and the organic light-emitting device of the organic light-emitting material, 4-H-cyclopentadiene bithiophene-1,1,7,7-tetroxide is adopted as a body structure, and through connection of ligand genes with different polarities, the obtained derivative has strong eletrophilicity, charge transferring capacity and light-emitting performance. In the organic light-emitting device prepared through the bithiophene pentalene derivative, the light-emitting efficiency is high, the pohotochromism is uniform, and the organic light-emitting device has good film stability and thermal stability, and the problem that a unipolarity transmission material in the organic light-emitting device is unbalanced in current carrier can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of organic photoelectric materials, in particular to an organic luminescent material with a dithienocyclopentadiene derivative structure and an organic luminescent device thereof. Background technique [0002] In recent years, organic light-emitting diode (OLED), as the next generation of full-color flat panel display and semiconductor lighting technology, is receiving more and more attention. Compared with liquid crystal display (LCD) technology, the imaging mechanism of the two is completely different. LCD uses backlight source, while OLED is self-illuminating and does not require a backlight source. It can be made thinner and lighter than LCD, saving the cost of the backlight module. Through more comparisons, it can be found that OLED is thinner and lighter, active light emission, low power consumption, fast response, no viewing angle limitation, high definition, high brightness, wide operating temperatur...

Claims

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Application Information

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IPC IPC(8): C07D495/04C07D519/00C09K11/06H01L51/54
CPCC09K11/06C07D495/04C07D519/00C09K2211/1029C09K2211/1092C09K2211/1088C09K2211/1044C09K2211/1033C09K2211/1059H10K85/6576H10K85/6574H10K85/6572
Inventor 董秀芹蔡辉
Owner CHANGCHUN HYPERIONS TECH CO LTD
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