Host material and organic electroluminescence device comprising same
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A host material and host technology, applied in the field of organic electroluminescent devices, can solve problems such as lack of materials, and achieve the effect of high luminous efficiency
Active Publication Date: 2022-02-18
ZHEJIANG HUADISPLAY OPTOELECTRONICS CO LTD
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Problems solved by technology
Currently, host materials with both high triplet energy levels and good hole mobility are still lacking.
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Embodiment 1
[0049] Embodiment 1: the synthesis of compound 1-1
[0050]
[0051] (1) Synthesis of intermediate 1-1-2
[0052] After compound 1-1-1 (85.0 g, 310 mmol) was dissolved in 1,4-dioxane (800 mL), 2-(4,4,5,5-tetramethyl-1,3 ,2-dioxaborolan-2-yl)aniline (81.5g, 372mmol), Pd(PPh 3 ) 4 (18g, 15.5mmol) and K 2 CO 3 (128 g, 930 mmol) saturated solution, and the resultant was stirred at 100° C. for 6 hours. After the reaction was terminated, the resultant was cooled to room temperature, and extracted with distilled water and ethyl acetate. The organic layer was treated with MgSO 4 Dried, and then filtered and concentrated. The concentrated residue was purified using column chromatography using ethyl acetate and hexane as developing solvents to obtain the target compound 1-1-2 (53.3 g, yield: 60%). LC-MS: M / Z 286.11 (M + ).
[0053] (2) Synthesis of intermediate 1-1-3
[0054] After compound 1-1-2 (80.8, 282 mmol) was dissolved by adding tetrahydrofuran, triethylamine (118 ...
Embodiment 2
[0059] Embodiment 2: the synthesis of compound 2-54
[0060]
[0061] Compound 2-54 was synthesized with reference to the method of Example 1, and the synthesis of compound 1-1 was referred to for other steps to obtain compound 2-54 (42.3 g, yield: 56%). LC-MS: M / Z755.26 (M + ).
Embodiment 3
[0062] Embodiment 3: the synthesis of compound 2-69
[0063]
[0064] Compound 2-69 was synthesized with reference to the method of Example 1, and the synthesis of compound 1-1 was referred to for other steps to obtain compound 2-69 (49.2 g, yield: 63%). LC-MS: M / Z781.31 (M + ).
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Abstract
The present invention provides a host material and an organic electroluminescent device comprising the same, the host material comprising at least one first host compound and at least one second host compound, wherein the first host compound is represented by the following formula 1 and the second host compound The two-host compound is represented by the following formula 2: The organic electroluminescent device of the present invention has excellent luminous efficiency and lifetime.
Description
technical field [0001] The present invention relates to a host material, more specifically, to a host material and an organic electroluminescent device containing the host material. Background technique [0002] With the development of multimedia technology and the improvement of informatization requirements, the performance requirements of panel displays are getting higher and higher. Among them, organic electroluminescent devices (such as OLED) have a series of advantages such as self-luminescence, low-voltage DC drive, full curing, wide viewing angle, rich colors, etc., and their potential applications in display and lighting technology have attracted widespread attention. Very broad. Organic electroluminescent devices are spontaneous light-emitting devices. The mechanism of OLED light emission is that under the action of an external electric field, electrons and holes are respectively injected from the positive and negative electrodes and then migrate, recombine and dec...
Claims
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Application Information
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