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A kind of organic electroluminescent device containing triazine compound and its application

An electroluminescent device and compound technology, applied in the field of organic electroluminescent devices, can solve the problems of difficult and high exciton utilization rate, high fluorescence radiation efficiency, low S1 state radiation transition rate, efficiency roll-off and the like

Active Publication Date: 2020-09-22
VALIANT CO LTD
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  • 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 by 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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  • A kind of organic electroluminescent device containing triazine compound and its application
  • A kind of organic electroluminescent device containing triazine compound and its application
  • A kind of organic electroluminescent device containing triazine compound and its application

Examples

Experimental program
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Effect test

Embodiment 1

[0064] The synthesis of embodiment 1 compound 1

[0065]

[0066] In a 500ml four-neck flask, under nitrogen atmosphere, add 0.01mol 2-chloro-4,6-diphenyl-[1,3,5]triazine, 0.03mol 6,6-dimethyl-11- p-Phenylboronic acid-6,11-dihydro-13-oxa-11-aza-indole[1,2-b]anthracene, dissolved in a mixed solvent (180ml toluene, 90ml ethanol), then added 0.03molNa 2 CO 3 aqueous solution (2M), then add 0.0001molPd (PPh 3 ) 4 , heated to reflux for 10-24 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 an HPLC purity of 98.2% and a yield of 64.00%.

[0067] Elemental analysis structure (molecular formula C 42 h 30 N 4 O): theoretical value C, 83.14; H, 4.98; N, 9.23; O, 2.64; tested value: C, 83.21; H, 4.92; N, 9.20;

[0068] HPLC-MS: The molecular weight of the material is 606.24, and the measured molecular weight is 606.31.

Embodiment 2

[0069] The synthesis of embodiment 2 compound 2

[0070]

[0071] In a 500ml four-necked flask, add 0.01mol of 2-chloro-4-phenyl-6-[1,1'; 3',1″]triphenyl-5'-yl-[1 ,3,5]triazine, 0.03mol 6,6-dimethyl-11-m-phenylboronic acid-6,11-dihydro-13-oxa-11-aza-indole[1,2-b] Anthracene, dissolved in a mixed solvent (180ml toluene, 90ml ethanol), then added 0.03molNa 2 CO 3 aqueous solution (2M), then add 0.0001molPd (PPh 3 ) 4 , heated to reflux for 10-24 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 HPLC purity of 99.6% and a yield of 64.00%.

[0072] Elemental analysis structure (molecular formula C 54 h 38 N 4 O): theoretical value C, 85.46; H, 5.05; N, 7.38; O, 2.11; tested value: C, 85.52;

[0073] HPLC-MS: The molecular weight of the material is 758.30, and the measured molecular weight is 758.52.

Embodiment 3

[0074] The synthesis of embodiment 3 compound 3

[0075]

[0076] The preparation method of compound 3 is the same as in Example 2, except that the raw material 2-chloro-4-(3,5-dimethylbenzene)-6-phenyl-[1,3,5]triazine replaces 2-chloro -4-Phenyl-6-[1,1';3',1"]triphenyl-5'-yl-[1,3,5]triazine.

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Abstract

The invention discloses an organic electroluminescent device containing a triazine compound and its application. The device includes a hole transport layer, a light-emitting layer, and an electron transport layer. The material of the light-emitting layer of the device includes a compound containing a triazine group. The structural formula of the compound is shown in general formula (1). Because the triazine 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 luminescent layer material is a triazine 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 light-em...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/54H01L27/32
CPCH10K59/12H10K85/60H10K50/11H10K2102/3026
Inventor 李崇陈棪张兆超
Owner VALIANT CO LTD
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