Polyfluorene derivative and organic light-emitting device thereof
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A technology of electroluminescent devices and derivatives, which is applied in the direction of electric solid-state devices, electrical components, luminescent materials, etc., and can solve the problems of short life of organic light-emitting devices, reduced material usage, poor thermal stability, etc.
Inactive Publication Date: 2018-09-14
CHANGCHUN HYPERIONS TECH CO LTD
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Problems solved by technology
However, the thermal stability of such materials is poor, resulting in a short lifetime of organic light-emitting devices using phosphorescent materials, thus reducing the use of such materials
Method used
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Embodiment 1
[0086] Preparation of compound 2
[0087]
[0088] Preparation of Intermediate A
[0089] Add 2-1 (31.81g, 100.00mmol) into 50.0mL of concentrated sulfuric acid, stir at room temperature for 2h, find that the color of the reaction solution turns yellow, slowly add 300.0mL of water, and then neutralize the reaction solution with sodium hydroxide to neutral, with solid Precipitated, cooled and filtered to obtain solid 1-2 (21.18g, 75.56mmol). 2-2 was dissolved in 150ml of ethylene glycol, 40ml of 30% hydrazine hydrate was added to reflux reaction, the reaction liquid was cooled and poured into water, and the precipitate was filtered to obtain white solid 2-3 (14.29g, 56.12mmol). Dissolve 1-3 in 150mL toluene, add 30g 2-4, 1.5g tetrabutylammonium bromide, reflux, cool and filter column chromatography to obtain white powder (14.76g, 47.55mmol). Finally, it was brominated, and the white powder was dissolved in 100.0mL of chloroform, and 1.0g of anhydrous ferric chloride was ad...
Embodiment 2
[0095] Preparation of Compound 22
[0096]
[0097] Preparation of Compound 22
[0098] Compound 22 was obtained by replacing 2-4 in Example 1 with 22-4 shown above, and 2-6 with 22-6 shown above. Mass Spectrum m / z: 1041.31 (calculated: 1041.32). Theoretical element content (%)C 80 h 52 N 2 : C, 92.28; H, 5.03; N, 2.69 Measured element content (%): C, 92.27; H, 5.02; N, 2.68 The above confirmed that the obtained product is the target product 22.
Embodiment 3
[0100] Preparation of compound 39
[0101]
[0102] Preparation of compound 39-6
[0103] The same as the preparation of compound 2-6 in Example 1.
[0104] Preparation of compound 39
[0105] Compound 39 was obtained by replacing 2-4 in Example 1 with 39-4 shown above, and 2-6 with 39-6 shown above. Mass Spectrum m / z: 915.11 (calculated: 915.12). Theoretical element content (%)C 68 h 42 N 4 : C, 89.25; H, 4.63; N, 6.12 The measured element content (%): C, 89.26; H, 4.64; N, 6.13. It was confirmed above that the obtained product was the target product 39.
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Abstract
The invention provides a polyfluorene derivative and an organic light-emitting device thereof, and belongs to the technical field of organic photoelectric materials. The derivative has a structure shown as a formula (I). The polyfluorene derivative disclosed by the invention has a larger conjugate plane structure, so that high electron fluidity can be provided; electron-deficient group dibenzofuran, dibenzothiophene, acridine, phenoxazine and phenothiazine structures are introduced to better facilitate the acception of electrons and enable the polyfluorene derivative to have good transmissionperformance; by introducing a bridged structure, on the one hand, the molecular weight of the compound can be enlarged, and the obtained material is enabled to have high glass transition temperature and prevent the crystallization effect; on the other hand, the derivatives are enabled to have certain distortion in three-dimensional stereoscopic structure, and the film-forming property of the derivative is improved. The organic light-emitting device, which is prepared by using the compound as a main body material in a luminescent layer, shows the advantages of low driving voltage and high luminous efficiency; the polyfluorene derivative is an organic luminescent material with excellent performance.
Description
technical field [0001] The invention relates to the technical field of organic photoelectric materials, in particular to a difluorene derivative and an organic electroluminescence device thereof. Background technique [0002] With the progress of the information industry, traditional displays can no longer meet people's requirements, such as: cathode ray tube (CRT) displays have large volume and high driving voltage; liquid crystal displays (liquid crystal display, LCD) have low brightness and narrow viewing angles. , The operating temperature range is small; the plasma display panel (PDP) is expensive, the resolution is not high, and the power consumption is large. [0003] Organic light-emitting diodes (organic light-emitting diodes, OLEDs) as a new display technology has unparalleled advantages in various performances of existing display technologies, such as full solid state, self-luminous, high brightness, high resolution , wide viewing angle (above 170 degrees), fast ...
Claims
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