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A compound, unsubstituted technology, applied in the field of organic electroluminescence, can solve the problems of OLED product efficiency, life, cost, etc. that cannot be completely solved, and achieve the effect of improving charge transport performance, improving luminous efficiency, and reducing voltage
Pending Publication Date: 2021-03-19
BEIJING ETERNAL MATERIAL TECH
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The currently used OLED materials and device structures cannot complet
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Synthetic example 1
[0130] Synthesis of Compound P2
[0131]
[0132] Under nitrogen atmosphere, M2 (23.03g, 50mmol), 1-bromo-3,5-difluorobenzene (9.65g, 50mmol), tridibenzylideneacetone dipalladium (Pd 2 (dba) 3 , 0.91g, 1mmol), 2-dicyclohexylphosphine-2',6'-dimethoxybiphenyl (s-phos, 0.82g, 2mmol), t-BuONa (9.60g, 100mmol), toluene 250mL Put it into a 1L reaction vessel, and reflux at 110°C for 12h. Cool to room temperature, combine and concentrate the organic phases. Separation by column chromatography yielded 23.13 g of intermediate P2-1. Molecular weight calculated: 572.66, found C / Z: 572.7.
[0133]
[0134] Under nitrogen atmosphere, put P2-1 (22.91g, 40mmol), phenol (9.41g, 100mmol), cesium carbonate (32.3g, 100mmol), N,N-dimethylformamide 200mL into a 1L reaction vessel, Reflux reaction at 150°C for 12h. Cool to room temperature, combine and concentrate the organic phases. Separation by column chromatography yielded 23.14 g of intermediate P2-2. Molecular weight calculated:...
Synthetic example 2
[0138] Synthesis of Compound P7
[0139] Replace M2 in Synthesis Example 1 with M1 of the same amount, and keep the other things unchanged, to obtain P7. Molecular weight calculated: 726.64, found C / Z: 726.6.
Synthetic example 3
[0141] Synthesis of Compound P11
[0142] Replace M2 in Synthesis Example 1 with 7H-benzo[C]carbazole in the same amount, and keep the others unchanged, to obtain P11. Molecular weight calculated: 485.35, found C / Z: 485.4.
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Abstract
The invention relates to compounds and application thereof. The compounds have a structure represented by a formula (I) in the specification. The compounds are applied to an organic electroluminescentdevice. The organic electroluminescent device comprises a first electrode, a second electrode and at least one organic material layer interposed between the first electrode and the second electrode,wherein at least one organic material layer comprises any one or a combination of at least two selected from the compounds as shown in the formula (I). According to the boron-containing compounds provided by the invention, at least one substituted or unsubstituted C6-C30 aryl group is fused on carbazole, so a conjugate plane is enlarged, electron delocalization is more obvious, a HOMO energy levelis shallower, and a LUMO energy level is deepened, thereby improving the charge transmission performance of a material, balancing carrier transmission, and effectively reducing voltage and improvingluminous efficiency. The compounds are applicable to organic electroluminescent devices.
Description
technical field [0001] The invention relates to the technical field of organic electroluminescence, in particular to a compound and its application. Background technique [0002] In recent years, optoelectronic devices based on organic materials have become increasingly popular. The inherent flexibility of organic materials makes them very suitable for manufacturing on flexible substrates. They can design and produce beautiful and cool optoelectronic products according to requirements, and obtain incomparable advantages over inorganic materials. Examples of such organic optoelectronic devices include organic light emitting diodes (OLEDs), organic field effect transistors, organic photovoltaic cells, organic sensors, and the like. Among them, OLED is developing rapidly, and has achieved commercial success in the field of information display. OLED can provide high-saturation red, green, and blue colors, and the full-color display device made of it does not need an additional...
Claims
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