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An organic electroluminescent device containing anthrone compound and its application

A technology of electroluminescent devices and compounds, applied in the field of organic electroluminescent devices, can solve difficult problems such as high exciton utilization rate and high fluorescence radiation efficiency, low S1 state radiation transition rate, efficiency roll-off, etc.

Active Publication Date: 2019-05-14
VALIANT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) The T1 and S1 states of the designed molecule have strong CT features and a very small S1-T1 state energy gap, although high T can be achieved through the TADF process 1 →S 1 State exciton conversion rate, but at the same time lead to low S1 state radiative transition rate, therefore, it is difficult to have both (or simultaneously achieve) high exciton utilization rate and high fluorescence radiation efficiency;
[0007] (2) Even if doped devices have been used to alleviate the T-exciton concentration quenching effect, the efficiency of most TADF material devices has a serious roll-off at high current densities

Method used

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  • An organic electroluminescent device containing anthrone compound and its application
  • An organic electroluminescent device containing anthrone compound and its application
  • An organic electroluminescent device containing anthrone compound and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Example 1 Compound 1

[0067]

[0068] In a 250ml four-necked flask, add 0.01mol 3-(4-bromophenyl)-10,10-dimethyl-10H-anthrone, 0.03mol 9,9-dimethylacridine under nitrogen atmosphere Pyridine, 0.03mol sodium tert-butoxide, 1×10 -4 mol Pd 2 (dba) 3 , 1×10 - 4 mol of tri-tert-butylphosphine, 150ml of toluene, heated to reflux for 24 hours, sampled and plated, the reaction was complete; naturally cooled, filtered, the filtrate was rotary evaporated, and passed through a silica gel column to obtain the target product with a purity of 95.2% and a yield of 77.00%.

[0069] HPLC-MS: The molecular weight of the material is 505.24, and the measured molecular weight is 505.29.

Embodiment 2

[0070] Example 2 Compound 2

[0071]

[0072] In a 250ml four-neck flask, under nitrogen atmosphere, add 0.01mol 3-(3-bromophenyl)-10,10-dimethyl-10H-anthrone, 0.03mol phenoxazine, 0.03mol tert-butyl Sodium alkoxide, 1 x 10 -4 mol Pd 2 (dba) 3 , 1×10 -4 mol of tri-tert-butylphosphine, 150ml of toluene, heated to reflux for 24 hours, sampled and plated, the reaction was complete; naturally cooled, filtered, the filtrate was rotary evaporated, and passed through a silica gel column to obtain the target product with a purity of 99.20% and a yield of 73.50%.

[0073] HPLC-MS: The molecular weight of the material is 479.19, and the measured molecular weight is 479.46.

Embodiment 3

[0074] Example 3 Compound 4

[0075]

[0076] In a 250ml four-necked flask, add 0.01mol 3,6-dibromo-10,10-diphenyl-10H-anthrone, 0.03mol 5-phenylphenazine, 0.03mol tert-butyl Sodium alkoxide, 1 x 10 -4 mol Pd 2 (dba) 3 , 1×10 -4 mol of tri-tert-butylphosphine, 150ml of toluene, heated to reflux for 24 hours, sampling plate, the reaction was complete; naturally cooled, filtered, the filtrate was rotary evaporated, and passed through a silica gel column to obtain the target product with a purity of 99.1% and a yield of 73.60%.

[0077] HPLC-MS: The molecular weight of the material is 858.34, and the measured molecular weight is 858.52.

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Abstract

The invention discloses an organic electroluminescent device containing anthrone compounds, the device comprises a hole transport layer, a light-emitting layer, and an electron transport layer, and the material of the light-emitting layer of the device includes a compound containing anthrone groups, and the compound The structural formula is shown in general formula (1). Because the anthrone-based material of the present invention has a smaller energy difference between the triplet state and the singlet state, it is easy to realize the energy transfer between the host and guest materials, so that the energy originally lost in the form of heat is easy to be used, and the radiative transition efficiency of the light-emitting layer is improved. Therefore, it is easier to obtain high efficiency of the device, and further, when the dopant material is selected as a fluorescent material, it is easier to obtain the luminescent radiation of the dopant material, so that it is easier to obtain a long life of the material.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to an organic electroluminescent device whose light-emitting layer material is an anthrone compound and an application thereof. 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 ligh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/54
CPCH10K85/626H10K85/615H10K85/6572H10K85/657
Inventor 李崇徐凯张兆超
Owner VALIANT CO LTD
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