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A kind of organic electroluminescent device containing diaryl ketone compound and its application

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

Active Publication Date: 2018-12-28
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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  • A kind of organic electroluminescent device containing diaryl ketone compound and its application
  • A kind of organic electroluminescent device containing diaryl ketone compound and its application
  • A kind of organic electroluminescent device containing diaryl ketone compound and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Example 1 Compound 1

[0068] The concrete synthetic route of this compound is provided now:

[0069]

[0070] In a 250ml four-necked flask, add 0.01mol 4,4'-dibromobenzophenone, 0.025mol 6,6-dimethyl-6,11-dihydro-13-oxa -11-aza-indole[1,2-b]anthracene, 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, 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 99.2% and a yield of 67.00%.

[0071] Elemental analysis structure (molecular formula C 55 h 40 N 2 o 3 ): theoretical value C, 85.03; H, 5.19; N, 3.61; O, 6.18; test value: C, 84.99; H, 5.21; N, 3.70;

[0072] HPLC-MS: The molecular weight of the material is 776.30, and the measured molecular weight is 776.83.

Embodiment 2

[0073] Example 2 Compound 6

[0074] The concrete synthetic route of this compound is provided now:

[0075]

[0076] In a 250ml four-necked flask, add 0.01mol 4,4'-dibromobenzophenone, 0.025mol 11,11-dimethyl-4a,6,11,13a-tetrahydro- 13-thia-6-aza-indo[1,2-b]anthracene, 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, 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 99.0% and a yield of 69.00%.

[0077] Elemental analysis structure (molecular formula C 55 h 42 N 2 OS 2 ): theoretical value C, 81.45; H, 5.22; N, 3.45; O, 1.97; test value: C, 81.50; H, 5.21; N, 3.40;

[0078] HPLC-MS: The molecular weight of the material is 810.27, and the measured molecular weight is 810.65.

Embodiment 3

[0079] Example 3 Compound 11

[0080] The concrete synthetic route of this compound is provided now:

[0081]

[0082] In a 250ml four-necked flask, add 0.01mol 2,2'-dibromobenzophenone, 0.025mol 6,6-dimethyl-13-phenyl-11,13-dihydro -6H-11,13-diaza-indole[1,2-b]anthracene, 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 99.5% and a yield of 72.00%.

[0083] Elemental analysis structure (molecular formula C 66 h 49 N 4 O): theoretical value C, 86.80; H, 5.44; N, 6.04; O, 1.73; tested value: C, 86.63; H, 5.29; N, 6.30;

[0084] HPLC-MS: The molecular weight of the material is 926.40, and the measured molecular weight is 926.52.

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Abstract

The invention discloses an organic electroluminescent device containing a diaryl ketone 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 diaryl ketone-containing Compound, the structural formula of the compound is shown in the general formula (1). Because the diaryl ketone group 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 radiation of the light-emitting layer is improved. Transition efficiency, so that 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 in which the light-emitting layer material is a diaryl ketone 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 th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/54H01L51/48C07D217/12
CPCC07D217/12H10K71/00H10K85/00H10K85/111H10K50/80H10K50/11H10K2102/00H10K2102/301Y02E10/549
Inventor 李崇徐凯张兆超
Owner VALIANT CO LTD
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