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A plurality of host materials and organic electroluminescent device comprising the same

A host material, unsubstituted technology, applied in luminescent materials, organic chemistry, organic semiconductor devices, etc., can solve unsatisfactory problems and achieve the effect of improving life characteristics

Pending Publication Date: 2021-01-19
ROHM & HAAS ELECTRONICS MATERIALS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they are not satisfactory in practical use

Method used

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  • A plurality of host materials and organic electroluminescent device comprising the same
  • A plurality of host materials and organic electroluminescent device comprising the same
  • A plurality of host materials and organic electroluminescent device comprising the same

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0143] Synthesis Example 1: Preparation of Compound H-1-52

[0144]

[0145] Compound 1-1 (7g, 13mmol), compound 1-2 (3g, 14.3mmol), K 2 CO 3 (5.4g, 39mmol) and Pd(PPh 3 ) 4 (0.75g, 0.65mmol) dissolved in 30mL of H 2 0, 60 mL of toluene and 30 mL of EtOH, and then the mixture was refluxed at 120 °C for 3 hours. After the reaction was completed, the organic layer was extracted with ethyl acetate, and the remaining moisture was removed by using magnesium sulfate. The residue was dried and separated by column chromatography to obtain compound H-1-52 (5.7 g, yield: 70%).

[0146] MW melting point H-1-52 642.73 154℃

Synthetic example 2

[0147] Synthesis Example 2: Preparation of Compound H-1-55

[0148]

[0149] Compound 2-1 (5.7g, 10.6mmol), compound 1-2 (2.5g, 11.7mmol), K 2 CO 3 (4.4g, 31.8mmol) and Pd(PPh 3 ) 4 (0.61g, 0.653mmol) dissolved in 30mL of H 2 0, 60 mL of toluene and 30 mL of EtOH, and then the mixture was refluxed at 120 °C for 3 hours. After the reaction was completed, the organic layer was extracted with ethyl acetate, and the remaining moisture was removed by using magnesium sulfate. The residue was dried and separated by column chromatography to obtain compound H-1-55 (1.2 g, yield: 18%).

[0150] MW melting point H-1-55 642.73 239℃

Synthetic example 3

[0151] Synthesis Example 3: Preparation of Compound H-1-46

[0152]

[0153] Add 70 mL of xylene to compound 3-1 (5 g, 13.07 mmol), 4-bromo-1,1':2',1"-terphenyl (4 g, 13.07 mmol), Pd 2 (dba) 3 (0.6g, 0.653mmol), NaOt-Bu (3.8g, 39.21mmol) and 2-dicyclohexylphosphino-2',6'-dimethoxybiphenyl (S-Phos) (0.5g, 1.307mmol ), and then the mixture was stirred for a day. After the reaction was complete, the mixture was cooled to room temperature, and extracted with distilled water and MeOH. The resulting product was separated by column chromatography using dichloromethane (MC) / hexane to obtain compound H-1-46 (6.3 g, yield: 78%).

[0154] MW melting point H-1-46 610.7 288℃

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Abstract

The present disclosure relates to a plurality of host materials comprising a first host material comprising a compound represented by formula 1, and a second host material comprising a compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds as a host material, it is possible to provide an organic electroluminescent device having an improved lifespan property, compared to conventional organic electroluminescent devices.

Description

technical field [0001] The present disclosure relates to various host materials and an organic electroluminescent device comprising the same. Background technique [0002] Small-molecule green organic electroluminescent devices (OLEDs) were first developed by Tang et al. at Eastman Kodak in 1987 by using a TPD / ALq3 bilayer consisting of an emissive layer and a charge transport layer. Since then, the development of OLEDs has been rapidly affected and OLEDs have been commercialized. Currently, OLEDs mainly use phosphorescent materials having excellent luminous efficiency in panel realization. However, OLED lifetime is insufficient in many applications such as TV and lighting equipment, and more efficient OLEDs are still required. Typically, the higher the brightness of an OLED, the shorter the lifetime of the OLED. Therefore, OLEDs characterized by high luminous efficiency and / or long lifetime are required for long-time use and high-resolution displays. [0003] In order t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06H01L51/50H01L51/54
CPCC09K11/06C09K2211/185C09K2211/1044C09K2211/1011C09K2211/1059C09K2211/1088C09K2211/1092C09K2211/1029H10K85/622H10K85/624H10K85/626H10K85/615H10K85/6576H10K85/6574H10K85/6572H10K85/342H10K50/12H10K50/11C07D409/04C07D409/10C07D209/94C07D251/24C07D487/16C07D405/10C07D487/04H10K85/654H10K2101/10H10K2101/90C09K2211/1018
Inventor 金宾瑞李琇炫郑昭永文斗铉朴头龙赵相熙金慧娟
Owner ROHM & HAAS ELECTRONICS MATERIALS LLC
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