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

A main material and unreplaced technology, which is applied in the direction of luminescent materials, organic chemistry, organic semiconductor devices, etc., can solve the problems such as the use of organic electroluminescent devices that have not been specifically disclosed, and achieve the effect of improving life characteristics and high luminous efficiency

Pending Publication Date: 2021-11-16
ROHM & HAAS ELECTRONICS MATERIALS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reference does not specifically disclose an organic electroluminescent device using a specific combination of various host materials of the present disclosure

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
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Effect test

example 1

[0124] Example 1: Preparation of Compound H2-1

[0125]

[0126] In a flask, mix 2-chloro-5-phenylpyrimidine (2.7g, 14.2mmol) and 5-phenyl-5,7-dihydroindolo[2,3-b]carbazole (3.5g, 10.9 mmol) into palladium (II) acetate (Pd(OAc) 2 ) (0.11g, 0.5mmol), ligand (2-dicyclohexylphosphine-2',6'-dimethoxybiphenyl) (0.45g, 1.1mmol), NaOt-bu (2.8g, 27.3mmol) , and toluene (200 mL), and the mixture was refluxed at 140° C. for 4 hours. After the reaction was completed, distilled water was added to the reaction mixture, and the organic layer was extracted with dichloromethane. The remaining moisture of the organic layer was removed using magnesium sulfate, and the residue was dried. The residue was separated by column chromatography to obtain 3.2 g of Compound H2-1 (yield: 60.3%) (melting point: 231° C.).

[0127] Device Example 1: Production of OLEDs Comprising Multiple Host Materials According to the Disclosure

[0128] OLEDs according to the present disclosure were produced. ...

example 2

[0130] Device Example 2: Production of OLEDs Comprising Multiple Host Materials According to the Disclosure

[0131] OLEDs were produced in the same manner as in Device Example 1, except that Compound H1-33 and Compound H2-1 were used as the first and second hosts, respectively.

example 3

[0132] Device Example 3: Production of OLEDs Comprising Multiple Host Materials According to the Disclosure

[0133] OLEDs were produced in the same manner as in Device Example 1, except that Compound H1-3 and Compound H2-1 were used as the first and second hosts, respectively.

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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 high luminous efficiency and / or improved lifespan properties, 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. In many applications such as TVs and lighting equipment, OLED lifetime is insufficient and high efficiency OLEDs are still required. Typically, the higher the brightness of an OLED, the shorter the lifetime that the OLED has. Therefore, OLEDs characterized by high luminous efficiency and / or long lifetime are required for long-time use and high-resolution displays. [0003] In order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/00H01L51/50
CPCH10K85/654H10K85/6574H10K85/6572H10K85/342H10K50/11H10K2101/10H10K2101/90H10K85/657C07D251/24C07D403/04C07D403/10C07D405/04C07D487/04C09K11/06C09K2211/1018H10K85/624
Inventor 全志松姜熙龙金侈植朴景秦金辰万尹承贤
Owner ROHM & HAAS ELECTRONICS MATERIALS LLC