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Boron-containing organic compound and application thereof on organic electroluminescent devices

An organic compound, unsubstituted technology, applied in the field of semiconductors, can solve the problems of low state radiative transition rate, difficult high exciton utilization rate and high fluorescence radiative efficiency, efficiency roll-off, etc.

Inactive Publication Date: 2020-07-31
JIANGSU SUNERA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although theoretically TADF materials can achieve 100% exciton utilization, there are actually the following problems: (1) T of the designed molecule 1 and S 1 states have strong CT features, very small S 1 -T 1 state energy gap, although a high T can be achieved by the TADF process 1 →S 1 state exciton conversion rate, but at the same time lead to low S 1 Therefore, it is difficult to have both (or simultaneously achieve) high exciton utilization efficiency and high fluorescence radiation efficiency; (2) Even if doped devices have been used to alleviate the quenching effect of T exciton concentration, most devices made of TADF materials Severe efficiency roll-off at high current densities

Method used

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  • Boron-containing organic compound and application thereof on organic electroluminescent devices
  • Boron-containing organic compound and application thereof on organic electroluminescent devices
  • Boron-containing organic compound and application thereof on organic electroluminescent devices

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Embodiment 1: the synthesis of compound 3:

[0084]

[0085] In a 250ml three-neck flask, under the protection of nitrogen, add 0.01mol intermediate P1, 0.01mol raw material E1, 0.01mol BBr 3 , 150ml THF, stirred at 50°C for 16 hours, cooled to room temperature, added methanol, stirred and reacted for 1 hour, sampled on the plate, and the reaction was complete; cooled to room temperature, filtered, the filtrate was rotary evaporated to no fraction, passed through a neutral silica gel column, and obtained The target product has an HPLC purity of 99.76% and a yield of 76.1%. Elemental analysis structure (molecular formula C 38 h 41 B): Theoretical value: C, 89.75; H, 8.13; B, 2.13; Test value C, 89.74; H, 8.12; B, 2.14. HPLC-MS: The molecular weight of the material is 508.33, and the measured molecular weight is 508.56.

Embodiment 2

[0086] Embodiment 2: the synthesis of compound 12:

[0087]

[0088] Prepare by the synthetic method of compound 3 in embodiment 1, difference is to replace intermediate P1 with intermediate P2; Elemental analysis structure (molecular formula C 39 h 39 BO): theoretical value: C, 87.63; H, 7.35; B, 2.02; 0, 2.99; test value C, 87.62; H, 7.34; B, 2.03; HPLC-MS: The molecular weight of the material is 534.31, and the measured molecular weight is 534.55.

Embodiment 3

[0089] Embodiment 3: the synthesis of compound 18:

[0090]

[0091] Prepare by the synthetic method of compound 3 in embodiment 1, difference is to replace intermediate P1 with intermediate P3; Elemental analysis structure (molecular formula C 45 h 44 BN): theoretical value: C, 88.65; H, 7.27; B, 1.77; 0, 2.30; test value C, 88.64; H, 7.28; B, 1.78; HPLC-MS: The molecular weight of the material is 609.36, and the measured molecular weight is 609.66.

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Abstract

The invention relates to a boron-containing organic compound and application thereof on organic electroluminescent devices, and belongs to the technical field of semiconductors. The structure of the provided compound is shown as a general formula (1). The invention also discloses an application of the boron-containing organic compound on organic electroluminescent devices. The compound is composedof boron groups, the rigidity of the boron groups is high, and the boron-containing organic compound has the advantages that molecules are not prone to crystallization or aggregation, and the film-forming property is good. When the boron-containing organic compound is used as a luminescent layer material of an organic electroluminescent device, the current efficiency, the power efficiency and theexternal quantum efficiency of the device are greatly improved; and meanwhile, the service life of the device is obviously prolonged.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to an organic compound containing boron and its application in organic electroluminescent devices. Background technique [0002] Organic electroluminescent (OLED: Organic Light Emission Diodes) device technology can be used to manufacture new display products and also can be used to make new lighting products, which is expected to replace the existing liquid crystal display and fluorescent lighting, and has a wide application prospect. [0003] The OLED light-emitting device is like a sandwich structure, including electrode material film layers, and organic functional materials sandwiched between different electrode film layers. Various functional materials are superimposed on each other according to the application to form an OLED light-emitting device. As a current device, when a voltage is applied to the electrodes at both ends of the OLED light-emitting device, and the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02C09K11/06H01L51/54
CPCC07F5/02C09K11/06C09K2211/1096C09K2211/1088C09K2211/1029C09K2211/1092C09K2211/1033C09K2211/104H10K85/622H10K85/615H10K85/636H10K85/633H10K85/657H10K85/6572H10K85/6576H10K85/6574
Inventor 李崇王芳殷梦竹张兆超叶中华
Owner JIANGSU SUNERA TECH CO LTD
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