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Purification method of organic substance used as material of organic light-emitting element

A technology of organic light-emitting elements and organic substances, which is applied in the direction of electrical components, semiconductor devices, electric solid devices, etc., can solve problems such as uneven brightness, unstable evaporation speed, and reduced production efficiency, so as to improve the process speed and evaporation Stabilization of plating speed and improvement of productivity

Active Publication Date: 2020-06-19
LG CHEM LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the sublimation purification method, the purified organic material that has been recrystallized and vapor-deposited on the inner wall of the tube is collected by scraping by hand. Potential for contamination or deterioration
[0008] In particular, when an organic light-emitting element is manufactured by using an organic substance containing such impurities as a material of an organic light-emitting element, the process preparation time becomes longer due to outgassing (Out-gassing) that occurs in the vacuum evaporation process, resulting in production failure. The problem of efficiency reduction is the cause of failure due to unevenness of brightness in the part deposited with an uneven thickness due to the unstable deposition rate

Method used

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  • Purification method of organic substance used as material of organic light-emitting element
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  • Purification method of organic substance used as material of organic light-emitting element

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Embodiment 1

[0064] 1) Purification process of organic substances (CPL) as the material of the covering layer

[0065] Utilize DSC (Differential scanning calorimetry, differential scanning calorimetry) and TGA (Thermogravimetric analysis, thermogravimetric analysis) to the compound represented by following chemical formula CPL respectively measure melting temperature (Tm) and 1% thermal decomposition temperature (Td1%) . Specifically, DSC Q100 V9.6Build 290 was used as the DSC device, and Q500 was used as the TGA device. As a result of the measurement, it was confirmed that the melting temperature was about 320°C and the 1% thermal decomposition temperature was 382°C.

[0066]

[0067] 4 kg of the above-mentioned compound was put into the cartridge of the sublimation purification apparatus to be sublimated and purified. Then, the inner tube and the outer tube were disassembled, and the organic matter crystallized on the wall surface of the inner tube was scraped and recovered. figure...

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Abstract

The present invention relates to a method for purifying an organic substance used as a material for an organic light-emitting element. The method for purifying an organic substance used as a material for an organic light-emitting element according to the present invention can provide a high-purity organic substance in a simple and effective manner, In particular, it is possible to provide a high-purity organic substance capable of improving production efficiency by increasing the process speed by suppressing outgassing, and stabilizing the vapor deposition rate to prevent defects caused by uneven vapor deposition.

Description

technical field [0001] Cross-references to related applications [0002] This application claims priority based on Korean Patent Application No. 10-2017-0121474 filed on September 20, 2017, and includes all the contents disclosed in the documents of the Korean Patent Application as a part of this specification. [0003] The present invention relates to a purification method of an organic substance used as a material of an organic light-emitting device. Background technique [0004] With the increasing use of organic materials in electronic components such as organic light-emitting elements, organic semiconductor elements, organic photoelectric conversion elements, and organic sensor elements, high-quality organic substances that can be used as materials for the manufacture of organic electronic elements are provided at low cost more and more important. [0005] In particular, conductive organic substances used in the electron injection layer, electron transport layer, hole...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/56H01L51/00
CPCH10K71/311H10K85/615H10K85/6572H10K99/00
Inventor 千民承洪性佶金炯锡崔愍偶
Owner LG CHEM LTD
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