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Organic electroluminescence composition and preparation method thereof

A technology of electroluminescent devices and compositions, which is applied in the direction of luminescent materials, organic chemistry, chemical instruments and methods, etc., can solve the problems of limiting the application space of phosphorescent materials and the high price of phosphorescent materials, and achieve excellent film stability and device efficiency Excellent and effective effect

Inactive Publication Date: 2018-06-01
VALIANT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The efficiency of phosphorescent devices is higher than that of fluorescent devices. However, phosphorescent devices also have their disadvantages. For example, phosphorescent materials are mainly complexes containing noble metals, especially metal iridium and platinum complexes. Since metal iridium and platinum are expensive, so , the price of phosphorescent materials is extremely expensive, which also limits the application space of phosphorescent materials

Method used

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  • Organic electroluminescence composition and preparation method thereof
  • Organic electroluminescence composition and preparation method thereof
  • Organic electroluminescence composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: the preparation of compound C01:

[0035]

[0036] S1: Preparation of compound 1: prepared by referring to the method described in the literature J.Org.Chem.2010, 75, 7877-7886 (belongs to the prior art, and the specific process will not be described in detail).

[0037] S2: Preparation of compound 2: In a 250mL three-necked flask, add compound 1 (4.2g, 8mmol), carbazole (3.34g, 20mmol), DMF (80g), potassium carbonate (4.14g, 30mmol), cuprous iodide (0.15g, 0.8mmol), 1,10-phenanthroline (0.29g, 1.6mmol), under the protection of nitrogen, heat up to 140°C, keep the temperature for 16h, cool down to 25°C, slowly pour the reaction solution into 300mL Stir in deionized water for 1 hour, filter with suction, rinse with 150 mL of deionized water, collect the filter cake, pass it through a silica gel column for purification, dichloromethane:petroleum ether = 1:1 elution (V / V), and obtain 4.13 g of compound 2 fine product, Yield 74%, structure identified by hi...

Embodiment 2

[0039]Embodiment 2: the preparation of compound C02: its preparation process is basically the same as in Example 1, and its differences are as follows:

[0040]

[0041] Referring to the method described in Example 1, compound C02 was prepared to obtain 2.7 g of the target object, high-resolution mass spectrum, positive ion mode, molecular formula C 48 h 28 f 6 N 4 , theoretical value 774.2218, test value 774.2226, elemental analysis (C 48 h 28 f 6 N 4 ), theoretical value C: 74.41,

[0042] H: 3.64, F: 14.71, N: 7.23, Found C: 74.39, H: 3.67, F: 14.76, N: 7.18.

Embodiment 3

[0043] Embodiment 3: Preparation of compound C03: its preparation process is basically the same as in Example 1, and its differences are as follows:

[0044]

[0045] Referring to the method described in Example 1, compound C03 was prepared to obtain 2.2 g of the target object, high-resolution mass spectrum, positive ion mode, molecular formula C 46 h 24 f 6 N 4 o 2 , theoretical value 778.1803, test value 778.1814, elemental analysis (C 46 h 24 f 6 N 4 o 2 ), theoretical value C: 70.95, H: 3.11, F: 14.64, N: 7.19, O: 4.11, measured value C: 70.92, H: 3.12, F: 14.60, N: 7.25, O: 4.11.

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Abstract

The invention discloses an organic electroluminescence composition and a preparation method thereof, wherein the small-molecular organic electroluminescence material is formed with 2-(2,5-bis(trifluoromethyl)cyclopenta-2,4-diene-1-alkylene)propyldicyan as a center. The material has excellent thin film stability and proper molecular energy levels, so that the material is suitable for being used asa small-molecular organic material. When being applied to an organic light-emitting device, by introducing a proper electron donor substituent group to the central structure, a D-A type molecular structure is formed; by screening the types of the substituent groups, a target molecular can acquire a very small S1-T1 energy level difference, so that under excitation, anti-intersystem crossing of a triplet state exciton is achieved, thereby effectively utilizing the energy of the triplet state exciton and acquiring a high device efficiency.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescence materials, in particular to a kind of 2-(2,5-bis(trifluoromethyl)cyclopenta-2,4-diene-1-ylidene) malondicyanide as the center Small molecule organic electroluminescence materials, and related to the application of the materials in the field of organic electroluminescence. Background technique [0002] Organic electroluminescent diode (OLED) was produced in the 1980s. It has many advantages such as self-illumination, wide viewing angle, fast response speed, wide color gamut, and flexible display. After nearly 30 years of continuous development, This technology has gradually matured. At present, organic electroluminescent technology has been widely used in many products such as smart phones, flat-panel TVs, and virtual reality. [0003] Organic electroluminescent devices are current-driven light-emitting devices. According to different light-emitting mechanisms, they can be divi...

Claims

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Application Information

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IPC IPC(8): C07C255/30C07D209/86C07D209/88C07D219/02C07D265/38C09K11/06H01L51/54
CPCC09K11/06C07C255/30C07D209/86C07D209/88C07D219/02C07D265/38C09K2211/1029C09K2211/1014C09K2211/1033H10K85/631H10K85/657H10K85/6572
Inventor 盛磊李小梅刘晓玲胡葆华张旭辉燕移寒
Owner VALIANT CO LTD
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