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Organic electroluminescent material with 9-fluorenone as core and application thereof

A luminescent and electromechanical technology, applied in luminescent materials, organic chemistry, circuits, etc., can solve problems such as efficiency roll-off, low S1 state radiation transition rate, difficult exciton utilization rate and high fluorescence radiation efficiency

Active Publication Date: 2017-03-01
JIANGSU SUNERA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although theoretically TADF materials can achieve 100% exciton utilization, there are actually the following problems: (1) The T1 and S1 states of the designed molecules have strong CT characteristics, and the very small S1-T1 state energy gap, although it can High T through TADF process 1 →S 1 state exciton conversion rate, but at the same time lead to a low S1 state radiative transition rate, 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 T excitation Subconcentration quenching effect, the efficiency of most TADF material devices has a serious roll-off at high current densities

Method used

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  • Organic electroluminescent material with 9-fluorenone as core and application thereof
  • Organic electroluminescent material with 9-fluorenone as core and application thereof
  • Organic electroluminescent material with 9-fluorenone as core and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Embodiment 1: the synthesis of compound 11:

[0077] synthetic route:

[0078]

[0079] In a 250mL three-neck flask, under a nitrogen atmosphere, add 0.01mol 2-bromo-9-fluorenone, 0.015mol intermediate A1, 0.03mol sodium tert-butoxide, 1×10 -4 molPd(dppf)Cl 2 , 180mL toluene, heated to reflux for 10 hours, sampled and spotted, the raw materials were completely reacted; naturally cooled to room temperature (20-25°C), filtered, and the filtrate was collected for vacuum rotary evaporation (-0.09MPa, 85°C), and column chromatography , to obtain the target product with a HPLC purity of 99.1% and a yield of 73.2%.

[0080] Elemental analysis structure (molecular formula C 46 h 30 N 2 o 2 ): theoretical value C, 85.96; H, 4.70; N, 4.36; 0, 4.98; test value: C, 85.95;

[0081] HPLC-MS: The theoretical molecular weight of the material is 642.74, and the measured molecular weight is 642.97.

Embodiment 2

[0082] Embodiment 2: the synthesis of compound 17:

[0083] synthetic route:

[0084]

[0085] In a 250mL three-neck flask, under a nitrogen atmosphere, add 0.01mol 2-bromo-9-fluorenone, 0.015mol intermediate B1, 0.03mol sodium tert-butoxide, 1×10 -4 molPd(dppf)Cl 2 , 180mL toluene, heated to reflux for 10 hours, sampled and spotted, the raw materials were completely reacted; naturally cooled to room temperature (20-25°C), filtered, and the filtrate was collected for vacuum rotary evaporation (-0.09MPa, 85°C), and column chromatography , the target product was obtained, the HPLC purity was 99.3%, and the yield was 74.8%.

[0086] Elemental analysis structure (molecular formula C 46 h 30 N 2 o 2 ): theoretical value C, 85.96; H, 4.70; N, 4.36; O, 4.98; test value: C, 85.94; H, 4.72; N, 4.37;

[0087] HPLC-MS: The theoretical molecular weight of the material is 642.74, and the measured molecular weight is 642.95.

Embodiment 3

[0088] Embodiment 3: the synthesis of compound 38:

[0089] synthetic route:

[0090]

[0091] In a 250mL three-neck flask, under a nitrogen atmosphere, add 0.01mol 2-bromo-9-fluorenone, 0.015mol intermediate C1, 0.03mol sodium tert-butoxide, 1×10 -4 molPd(dppf)Cl 2 , 180mL toluene, heated to reflux for 10 hours, sampled and spotted, the raw materials were completely reacted; naturally cooled to room temperature (20-25°C), filtered, and the filtrate was collected for vacuum rotary evaporation (-0.09MPa, 85°C), and column chromatography , to obtain the target product with a HPLC purity of 99.5% and a yield of 74.2%.

[0092] Elemental analysis structure (molecular formula C 49 h 36 N 2 o 2 ): theoretical value C, 85.94; H, 5.30; N, 4.09; 0, 4.67; test value: C, 85.95;

[0093] HPLC-MS: The theoretical molecular weight of the material is 684.82, and the measured molecular weight is 685.04.

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Abstract

The invention discloses an organic electroluminescent material with 9-fluorenone as a core and an application thereof. With the 9-fluorenone as the core, molecules of the compound are not liable to crystallize and aggregate and the compound has excellent film forming property. The compound is used on organic light emitting diodes as a luminescent layer material. The compound has excellent photoelectric performance and can satisfy application requirements of panel manufacturers better.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to a compound with 9-fluorenone as the core and its application as a light-emitting layer material in an organic light-emitting diode. 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 OL...

Claims

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Application Information

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IPC IPC(8): C07D413/04C07D265/34C07D401/04C07D403/04C07D221/18C07D405/04C07D417/04C07D265/38C07D491/048C07D513/04C07D491/052C07D471/04C07D471/06C07D498/04C07D498/06C07D487/06C07D413/14C07D401/14C07D405/14C07D219/08C07D403/14C07D417/14C07D241/38C07D241/46C07D405/12C07D417/12C09K11/06H01L51/54
CPCC09K11/06C07D219/08C07D221/18C07D241/38C07D241/46C07D265/34C07D265/38C07D401/04C07D401/14C07D403/04C07D403/14C07D405/04C07D405/12C07D405/14C07D413/04C07D413/14C07D417/04C07D417/12C07D417/14C07D471/04C07D471/06C07D487/06C07D491/048C07D491/052C07D498/04C07D498/06C07D513/04C09K2211/1011C09K2211/1007C09K2211/1029C09K2211/1037C09K2211/1033C09K2211/1044C09K2211/1092C09K2211/1088H10K85/6576H10K85/6574H10K85/657H10K85/6572
Inventor 唐丹丹徐凯李崇张兆超王立春
Owner JIANGSU SUNERA TECH CO LTD
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