Compound containing xanthone and organic electroluminescent device containing same

A technology of xanthone and compound, which is applied in the field of organic electroluminescent devices, can solve the problems of high fluorescence quantum yield, insufficient development of TADF materials, lagging efficiency and lifetime development, etc., and achieve low attenuation coefficient, small The effect of spectrum change and channel increase

Pending Publication Date: 2022-03-29
JIANGSU SUNERA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Theoretically, TADF materials can realize 100% exciton utilization rate through anti-intersystem jumping from triplet state to singlet state, but in the process of acting as a host or doping in practical applications, the device effect is not good, and its main The following problems: (1) Since the design of TADF materials requires a small S1-T1 band gap, it is difficult to achieve both fast anti-system crossing rate (short delayed luminescence lifetime) and high fluorescence quantum yield; (2) due to Strong CT effect, TADF material has spectral instability caused by different ratios
[0005] As far as the actual needs of the current OLED display lighting industry are concerned, the development of TADF materials is far from enough, and a lot of manpower and material resources still need to be invested to solve the problems of lagging efficiency and life span encountered in the commercialization of this type of materials.

Method used

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  • Compound containing xanthone and organic electroluminescent device containing same
  • Compound containing xanthone and organic electroluminescent device containing same
  • Compound containing xanthone and organic electroluminescent device containing same

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0098]

[0099] 1) Add 0.01mol of raw material A1 and 0.012mol of raw material B1 to 120mL of toluene:ethanol=2:1 (volume ratio) mixed solvent, add 0.02mol of sodium carbonate aqueous solution 10mL, under nitrogen protection, add 0.0005 mol Pd(PPh 3 ) 4 , heated to 110°C and reacted for 12 hours, took a sample and spotted the plate, after the raw material A1 was completely reacted, cooled and filtered, the filtrate was rotary evaporated to remove the solvent, and the crude product was passed through a silica gel column to obtain intermediate C1; HPLC purity 99.25%, yield 85.3 %;

preparation Embodiment 2

[0101]

[0102]

[0103] 1) Under the protection of nitrogen, 0.01 mol of raw material S1, 1.2 mol of NaCN, 0.0005 mol of Sm (samarium) powder, 2 mol of KOH and 80 mL of DMSO were added. The mixture was further stirred at 110°C for 12 hours. Sampling and pointing plate showed that there was no remaining raw material S1, and the reaction was complete; naturally cooled to room temperature, filtered, added 100mL ethyl acetate and 100ml water to the filtrate, put it into a separatory funnel, stood still, and separated liquids. The organic phase was washed three times with saturated aqueous sodium chloride solution, the organic phase was taken, and anhydrous MgSO 4 Remove water. After filtration, the filtrate was rotary evaporated under reduced pressure, and purified by a neutral silica gel column to obtain intermediate B2. HPLC purity 98.37%, yield 73.7%;

[0104] 2) Add 0.01mol of raw material A1 and 0.012mol of intermediate B2 to 120mL of toluene:ethanol=2:1 (volume rat...

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Abstract

The invention relates to a compound containing xanthone and an organic electroluminescent device containing the same, and belongs to the technical field of semiconductors, and the structure of the compound provided by the invention is shown as a general formula (I). According to the present invention, the fluorescence quantum efficiency of the material can be improved, the delayed fluorescence lifetime can be reduced, the luminous efficiency of the device can be improved by the improvement of the fluorescence quantum efficiency of the material, and the quenching phenomenon of excitons can be reduced by the reduction of the delayed fluorescence lifetime, such that the photoelectric property of the OLED device can be effectively improved by the compound.

Description

technical field [0001] The invention belongs to the field of organic photoelectric materials, and relates to a new organic compound containing xanthone and an organic electroluminescent device with a light-emitting layer containing xanthone. 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. 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 ...

Claims

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Application Information

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IPC IPC(8): C07D491/048C07D487/04C07D405/14C07D405/10C09K11/06H01L51/54
CPCC07D491/048C07D487/04C07D405/14C07D405/10C09K11/06C09K2211/1059C09K2211/1029C09K2211/1033C09K2211/1088C09K2211/1044H10K85/654H10K85/6574H10K85/6572H10K85/657
Inventor 蔡啸陆颖曹旭东李崇崔明
Owner JIANGSU SUNERA TECH CO LTD
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