Aromatic amine derivative organic electroluminescent material and device
An aryl and compound technology, applied in the field of aromatic amine derivative organic electroluminescent materials and devices thereof, can solve problems such as undisclosed and taught, undisclosed and taught aromatic amine device effects, unaware of device performance effects, etc. , to achieve the effect of high external quantum efficiency, narrow half-peak width, and good device performance
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[0156] The preparation method of the compound of the present invention is not limited, and the following compounds are typically, but not limited to, exemplified. The synthetic route and preparation method are as follows:
[0157] Synthesis Example 1: Synthesis of Compound BD32
[0158] first step:
[0159]
[0160] Put LDA (100mL, 200mmol) in a 250mL three-neck flask, place it under dry ice-ethanol and stir for half an hour, add methyl isobutyrate (23mL, 200mmol), and continue stirring for half an hour. 1-Bromo-2-(bromomethyl)benzene (25 g, 100 mmol) was added and filtered through celite. After concentration, the crude product intermediate 1 was obtained, which was directly carried out to the next reaction.
[0161] Step two:
[0162]
[0163] Intermediate 1 (27g, 100mmol) and potassium hydroxide (56g, 1mol) were mixed, 100mL of water and 10mL of methanol were added, and the reaction was heated to 100°C until the reaction was detected by TLC. After cooling, after th...
Embodiment 3
[0369] In Example 3, the N-ortho position of the arylamine further introduces a neopentyl group, compared to the introduction of a methyl group in the N-ortho position of the arylamine in Example 1, the addition of the ortho substituent and the increase in the molecular volume of the ortho substituent The EQE increases gradually (9.48vs.9.11), and the half-width also narrows (28.5nm vs.29.7nm). Compared with Comparative Example 1, both EQE and half peak width were improved. The results show that based on the dual structure of arylamine with benzo five-membered ring and biaryl substituent, the introduction of substituents at the N-ortho position can further improve the blue light-emitting performance, and this effect varies with the N-ortho position Substituents increase in molecular volume.
[0370] The device data of table 4 embodiment 5 and embodiment 6
[0371] part number CIE(x,y) λmax(nm) FWHM(nm) EQE(%) Example 5 0.139,0.089 456 31.3 8.99 ...
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