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An electroluminescent device, organic technology, applied in the direction of electro-solid devices, electrical components, light-emitting materials, etc., can solve the problems that plague the OLED industry, and achieve the effects of being difficult to crystallize, easy to form films, and reducing coplanarity.
Inactive Publication Date: 2019-03-29
CHANGCHUN HYPERIONS TECH CO LTD
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[0005] At present, research on organic electroluminescent materials has been widely carried out in academia and industry, and a large number of organic light-emitting materials with excellent performance have been developed one after another. Low-cost white light devices and full-color display devices, but the industrialization process of this technology still faces many key problems. How to improve the luminous efficiency of devices and prolong the service life of devices has always been a problem that has plagued the OLED industry.
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Embodiment 1
[0097] [Example 1] Synthesis of Compound A-2
[0098]
[0099] Step1: Add 1,1':3',1"terphenyl-5'-amine (2.45g, 10mmol), 5'-bromo-1,1':3',1"terphenyl-5'-amine (3.09g , 10mmol), Pd 2 (dba) 3 (0.21g, 0.25mmol), P(t-Bu) 3 (0.18g, 0.84mmol), NaOt-Bu (2.8g, 25mmol), 100mL of toluene solution, reacted at 100°C for 24h, extracted the organic phase with diethyl ether and water after the reaction, and washed the organic layer with MgSO 4 Dry, concentrate the organic matter, go through column chromatography and recrystallize to obtain intermediate A-2-1 (3.88g, 82%).
[0100] Step2: Add intermediate A-2-1 (4.74g, 10mmol), p-bromoiodobenzene (2.83g, 10mmol), Pd to the reactor 2 (dba) 3 (0.21g, 0.25mmol), P(t-Bu) 3 (0.18g, 0.84mmol), NaOt-Bu (2.8g, 25mmol), 100mL of toluene solution, reacted at 100°C for 24h, extracted the organic phase with diethyl ether and water after the reaction, and washed the organic layer with MgSO 4 Drying, concentration of organic matter, column chromat...
Embodiment 2
[0102] [Example 2] Synthesis of Compound A-14
[0103] Compound A-14 (6.50 g, 78%) was obtained according to the synthesis method of compound A-2.
[0104]
Embodiment 3
[0105] [Example 3] Synthesis of Compound A-24
[0106] Compound A-24 (6.98 g, 79%) was obtained according to the synthesis method of compound A-2.
[0107]
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Abstract
The invention provides an organic electroluminescence device and relates to the technical field of organic electroluminescence. According to the invention, compounds shown as chemical formula I and IIare applied to the organic electroluminescence device, are jointly used as a hole transport layer of the device and are adaptively combined with each other, so that heat stability and carrier transport property of the material are effectively promoted, compounding probability of carrier is promoted, driving voltage of device is effectively reduced, luminous efficiency of device is increased, service life of device is prolonged and the problems of low heat stability of material, short service life and low luminous efficiency of the organic electroluminescence device are effectively solved.
Description
technical field [0001] The invention relates to the technical field of organic electroluminescence, in particular to an organic electroluminescence device. Background technique [0002] Organic electroluminescence is the process of converting electrical energy into light energy. By applying a voltage across the cathode and anode, injecting electrons and holes, the electrons and holes pass through the organic layer formed by the organic light-emitting material, and finally combine to form excitons in the light-emitting layer. The excitons return to a stable ground state to radiate light. [0003] The structure of a typical organic electroluminescent device generally includes a cathode, an anode and an organic layer between the electrodes. The composition of the device generally includes a transparent ITO anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and a cathode. [0004] The main wo...
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