An organic electroluminescent compound
An electroluminescence and compound technology, applied in the field of materials, can solve the problems of poor service life, unbalanced hole and electron transport properties, and low efficiency, and achieve the effect of long service life and good fluorescence quantum efficiency.
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Embodiment 1
[0042] The synthesis of embodiment 1 compound (1)
[0043]
[0044] The first step, the synthesis of intermediate a1, its chemical reaction formula is as follows:
[0045]
[0046] Dissolve p-bromoiodobenzene (28.3g, 100mmol), thiophenol (11.0g, 100mmol) and anhydrous potassium carbonate (27.6g, 200mmol) in 200mL of dimethyl sulfoxide, and heat to 120 ℃, reacted for 12 hours, cooled to room temperature, poured the reaction solution into 1L of deionized water, added 500mL of dichloromethane for extraction, combined the organic phases, removed the solvent under reduced pressure, and separated and purified with silica gel chromatography to obtain pure Intermediate a1 (20.0 g, 75 mmol), yield 75%, mass spectrum MS [ESI+] m / z=264.21 (theoretical value 263.96).
[0047] The second step, the synthesis of intermediate a2, its chemical reaction formula is as follows:
[0048]
[0049] Add intermediate a1 (13.3g, 50mmol) to 150mL of acetic acid and heat to 100°C; then add 20m...
Embodiment 2
[0056] The synthesis of embodiment 2 compound (3)
[0057]
[0058] The first step is to synthesize intermediate a1, for specific steps refer to the first step of Example 1;
[0059] In the second step, intermediate a2 is synthesized. For specific steps, refer to the second step in Example 1;
[0060] In the third step, intermediate b3 is synthesized, and its chemical reaction formula is as follows:
[0061]
[0062] Intermediate a2 (10.7g, 30mmol), dibenzofuran-4-amino (6.4g, 35mmol), bis(dibenzylideneacetone)palladium (578mg, 0.9mmol), tri-tert-butylphosphine (182mg, The mixture of 0.9mmol) and toluene (200ml) was heated to 90°C under argon gas flow, after adding sodium tert-butoxide (115mg, 1.2mmol), heated to 110°C under argon atmosphere, and stirred for 18 hours. The reaction mixture was cooled to room temperature, and water was added for liquid separation. The solvent of the obtained organic layer was concentrated, and the obtained solid was purified by silica g...
Embodiment 3
[0070] Embodiment 3 uses the OLED device manufacturing method of compound (1)
[0071] A transparent electrode made of indium tin oxide with a film thickness of 120 nm was provided on a glass substrate with a size of 25×75×1.1 mm. Then the glass substrate is subjected to oxygen plasma treatment, and after cleaning, the substrate is placed on a vacuum evaporation device.
[0072] First, HT-1 and Dopant-1 were co-evaporated at a weight ratio of 95:5 as a hole injection layer with a thickness of 150 nm. Then 20nm of HT-2 was evaporated on it as a hole transport layer. Next, EM-1 was used as a light-emitting material, and the above-mentioned compound (1) was used as a dopant material in a 95:5 weight ratio to form a light-emitting layer with a thickness of 30 nm.
[0073] Finally, 30 nm of ET-1 was evaporated as the electron transport layer, followed by 1.5 nm of cesium fluoride (CsF), followed by 120 nm of aluminum as the cathode.
[0074] The compounds HT-1, Dopant-1, HT-2, E...
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