Organic light-emitting material with bithiophene pentalene derivative structure and organic light-emitting device of organic light-emitting material
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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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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 recombin
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[0041] [Example 1] Synthesis of compound 1
[0042]
[0043] *Synthesis of Intermediate 1-1
[0044] Add 4-H-cyclopentadithiophene (1.92g, 10.8mmol), 50mL of DMSO, bromoethane (2.44g, 22.4mmol), KI (0.05g, 0.30mmol) into the reactor. Under nitrogen purge and ice bath conditions, add 2g of finely ground KOH powder, then stir the mixture for 24h at room temperature, then put the reactor into an ice bath tank and add 50mL water, and the organic phase was extracted twice with ether. Then rinse with water, brine and ammonium chloride, MgSO 4 After drying and distilling off the solvent, 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] Under nitrogen and no light conditions, add 1-1 (2.34g, 10.0mmol), DMF solution 60mL, glacial acetic acid 60mL, chloroform 50mL, add NBS (4.44g, 25.0mmol), stir at room temperature for 2h to obtain crude The product was precipitated, filtered, and washed ...
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[0056] [Example 2] Synthesis of compound 8
[0057] Refer to the synthesis method of compound 1 to obtain compound 8 (3.56 g, 52%).
[0058]
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[0059] [Example 3] Synthesis of compound 20
[0060] Refer to the synthesis method of compound 1 to obtain compound 20 (3.26 g, 57%).
[0061]
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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...
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