Novel organic electroluminescent compounds and organic electroluminescent device using the same
An electroluminescence and compound technology, applied in the field of organic electroluminescence devices, can solve the problems of difficulty and inability to achieve blue
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[0288] Next, for the understanding of the present invention, the organic electroluminescent compound of the present invention, its preparation method and the electroluminescence characteristics of the device are described. However, the following examples are for illustrative purposes only and do not limit the scope of the present invention.
preparation example 1
[0290] [Preparation Example 1] Preparation of Compound 1
[0291]
[0292] Preparation of Compound A
[0293] 1,4-Dibromobenzene (20.0 g, 56.81 mmol) was dissolved in tetrahydrofuran (1000 mL). After lowering the temperature to -78°C, 2.5M butyl lithium (n-BuLi) (56.81 mL, 142.02 mmol) was slowly added dropwise. After stirring for 30 minutes, N,N-dimethylformamide (DMF) (13.19 mL, 170.43 mmol) was added. After slow heating, then stirring for 2 h, NH 4 Cl aqueous solution (800 mL) and distilled water (800 mL) were used to quench the reaction. The organic layer was separated and the solvent was removed under reduced pressure. Recrystallization was performed using methanol and hexane to obtain compound A (11.09 g, 44.31 mmol).
[0294] Preparation of Compound B
[0295] Compound A (11.09 g, 44.31 mmol) and NaBH 4 (2.5 g, 66.47 mmol) was charged to one reactor. After removing the air under reduced pressure, nitrogen gas was filled therein. After adding tetrahydrofu...
Embodiment 1
[0320] [Example 1] Manufacturing OLED devices using the organic electroluminescent compound of the present invention
[0321] OLED devices are fabricated using the organic electroluminescent compounds of the invention. First, a thin film (15Ω / □)2 of ITO for the transparent electrode of an OLED (Samsung Corning)1 prepared from a glass substrate was ultrasonically cleaned with the following substances in order: trichloroethylene, acetone, ethanol and distilled water , store in isopropanol until use.
[0322] Then, the ITO substrate was installed in the substrate holder of the vacuum vapor deposition equipment. After putting 4,4',4"-tris(N,N-(2-naphthyl)-phenylamino)triphenylamine (2-TNATA) (its structure is shown below) into the chamber of the vacuum vapor deposition equipment , reduce the chamber pressure to 10 -6 support. Then, an electric current was applied to the chamber to evaporate 2-TNATA. A hole injection layer 3 with a thickness of 60 nm was formed on the ITO subs...
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