Organic compound, and organic electroluminescent device employing same

Abstract

The invention discloses an organic compound, and an organic electroluminescent device employing same and belongs to the field of organic electroluminescence. The molecular structure of the organic compound is represented as the formula (I), wherein the A1 to A4 are independently selected from substituted or non-substituted C6-C60 aryl or heteroaryl, wherein the heteroaryl contains at least one hetero atoms selected from B, N, O, S, Si and P, preferably at least one N; the X is independently selected from O, S, Se, C(R)2, Si(R)2, NR, P(=O)R, or carbonyl; the R is selected from H, CN, alkyl andaryl. The organic compound has excellent thermal-stability and high triplet state energy level, can balance the transfer of holes and electrons, is more sufficient in energy transfer, and effectivelyimproves efficiency and service life of the device.

Description

technical field

[0001] The invention relates to an organic compound in the field of organic electroluminescence and an organic electroluminescence device using the compound, in particular to a triphenylamine derivative and an organic electroluminescence device using the compound. Background technique

[0002] Organic electroluminescent devices (OLED: Organic Light Emission Diodes) have the advantages of wide viewing angle, fast response speed, high color quality, flexible light emission, etc., and have broad application prospects. OLED devices usually have a sandwich structure, including positive and negative electrode film layers and an organic functional material layer sandwiched between the electrode film layers. Apply voltage to the electrodes of the OLED device, positive charges are injected from the positive electrode, and negative charges are injected from the negative electrode. Under the action of the electric field, the positive and negative charges migrate in the ...

Examples

Embodiment 1

[0055] Synthesis of compound C-6

[0056]

[0057] Add (6.8g, 10.6mmol), bis(4-methylphenyl)amine (5.0g, 25.4mol), Pd 2 (dba) 3 (0.08g, 0.4mmol), sodium tert-butoxide (3.4g, 0.035mol), tri-tert-butylphosphine (0.07g, 0.4mmol), 60mL of toluene, and stirred at reflux for 2 hours. Cool at room temperature after the reaction is complete. The reaction solution was extracted with dichloromethane and water. The organic layer was separated, dried over magnesium sulfate, and concentrated under reduced pressure. The substance was separated and purified by column chromatography, and then recrystallized by dichloromethane and acetone to obtain compound C-6 (3.7 g, 40%). The resulting compound was identified by LC-MS. LC-MS: M / Z 873.3(M+H) + . Theoretical element content (%)C 65 H48N 2O : C, 89.42; H, 5.54; N, 3.21; O, 1.83. The above results confirmed that the obtained product was the target product.

Embodiment 2

[0059] Synthesis of compound C-9

[0060]

[0061] The synthesis steps of compound C-9 are as the above reaction formula, and the preparation and confirmation methods are the same as those of compound C-6, and compound C-9 (4.4 g, 38%) can be obtained. LC-MS: M / Z 1081.4 (M+H)+.

Embodiment 3

[0063] Synthesis of compound C-11

[0064]

[0065] The synthesis steps of compound C-11 are as the above reaction formula, and the preparation and confirmation methods are the same as those of compound C-6, and compound C-9 (4.7 g, 40%) can be obtained. LC-MS: M / Z 1121.4 (M+H)+.

technical field

[0001] The invention relates to an organic compound in the field of organic electroluminescence and an organic electroluminescence device using the compound, in particular to a triphenylamine derivative and an organic electroluminescence device using the compound. Background technique

[0002] Organic electroluminescent devices (OLED: Organic Light Emission Diodes) have the advantages of wide viewing angle, fast response speed, high color quality, flexible light emission, etc., and have broad application prospects. OLED devices usually have a sandwich structure, including positive and negative electrode film layers and an organic functional material layer sandwiched between the electrode film layers. Apply voltage to the electrodes of the OLED device, positive charges are injected from the positive electrode, and negative charges are injected from the negative electrode. Under the action of the electric field, the positive and negative charges migrate in the ...

Examples

Embodiment 1

[0055] Synthesis of compound C-6

[0056]

[0057] Add (6.8g, 10.6mmol), bis(4-methylphenyl)amine (5.0g, 25.4mol), Pd 2 (dba) 3 (0.08g, 0.4mmol), sodium tert-butoxide (3.4g, 0.035mol), tri-tert-butylphosphine (0.07g, 0.4mmol), 60mL of toluene, and stirred at reflux for 2 hours. Cool at room temperature after the reaction is complete. The reaction solution was extracted with dichloromethane and water. The organic layer was separated, dried over magnesium sulfate, and concentrated under reduced pressure. The substance was separated and purified by column chromatography, and then recrystallized by dichloromethane and acetone to obtain compound C-6 (3.7 g, 40%). The resulting compound was identified by LC-MS. LC-MS: M / Z 873.3(M+H) + . Theoretical element content (%)C 65 H48N 2O : C, 89.42; H, 5.54; N, 3.21; O, 1.83. The above results confirmed that the obtained product was the target product.

Embodiment 2

[0059] Synthesis of compound C-9

[0060]

[0061] The synthesis steps of compound C-9 are as the above reaction formula, and the preparation and confirmation methods are the same as those of compound C-6, and compound C-9 (4.4 g, 38%) can be obtained. LC-MS: M / Z 1081.4 (M+H)+.

Embodiment 3

[0063] Synthesis of compound C-11

[0064]

[0065] The synthesis steps of compound C-11 are as the above reaction formula, and the preparation and confirmation methods are the same as those of compound C-6, and compound C-9 (4.7 g, 40%) can be obtained. LC-MS: M / Z 1121.4 (M+H)+.

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