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[GLOBAL TECH KOREA 2021] Solus Advanced Materials ‘Expansion of new businesses other than light emitting materials such as high refractive filler and TFE’

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At ‘GLOBAL TECH KOREA 2021’ held in September 2021, Taehyung Kim, Head of Electronic Materials Business Division, Solus Advanced Materials made a presentation under the theme of ‘Solus’ Giant Step To Lead OLED Materials Technology’.

Solus Advanced Materials has monopolized the HBL market for over 8 years as a domestic display material specialist. Director Kim of Solus Advanced Materials said, “During the development of HBL, we also developed ETL with similar chemical structure and important compatibility with HBL. The performance is evaluated as equal to or higher than that of other companies’ top performance, and it will be able to enter the market soon.”

Director Kim said, “Originally, we mainly developed ETL or HBL related to electronics, but it was difficult to develop from the perspective of the overall device, so we developed HTL related to hall.” In addition “The development of HTL was completed about two years ago through joint development with LG Display, and it was approved for large panel use in May” he said. He also said, “The panel supply is gradually increasing and will be expanded to the Guangzhou line by next year.”, “HTL is structurally related to g-prime for mobile, so it is expected that it can be expanded to g-prime on the mobile side,” he said.

                                                 

Solus Advanced Materials is developing not only light-emitting materials, but also high-refractive fillers and TFEs. Director Kim said, “The mass production of fillers will be visible from this year. There are various materials such as epoxy, urethane, and acrylic type, and we plan to mass-produce the refractive index and viscosity control according to customer specifications.”

In the TFE sector, General Manager Kim said, “The permittivity of TFE currently used in the market is 3.0 or higher, and we received a request to lower the permittivity of the monomer by 30% or more to increase touch sensitivity two years ago and have been developing it. “The permittivity of the TFE monomer being developed by Solus is down to 20%, and the UV CUT function has achieved a specification of less than 5% at around 400 nanometers, and it is being promoted and tested by customers.”

Solus Advanced Materials is currently expanding its OLED-related businesses to various OLED-related luminescent materials such as HBL, ETL, and HTL, as well as high-refractive materials and TFE monomers. It is noteworthy in which areas these various business groups can shine in the future.

Material Science to develop blue dopant for OLED … OLED Efficiency ⋅ Lifetime Up↑

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A Korean venture company has succeeded in developing blue dopant for Organic Light Emitting Diodes (OLED) that a Japanese company has had its exclusive patent for. The dopant is an element that improves efficiency and life time by mixing with host that actually colors within the OLED.

In the meantime, many domestic material companies have developed OLED host, but it is the first case that a venture company has independently developed dopant on a commercial scale without receiving any support of large corporations.

 

Material Science (CEO Lee Soon-chang), an organic material developer for OLED has developed a technology that can replace Japanese I Company’s patent for blue dopant. Established in 2014, Material Science is supplying HTL( Hole Transporting Layer) and ETL (Electron Transfer Layer) to OLED panel makers.
Half of the 50 employees are R&D personnel. Last year, its sales were 6.6 billion won, and it is expected to exceed 10 billion won this year.

This time, due to the development of blue dopant by Material Science, OLED panel companies have an alternative to supply blue host and dopant besides I Company.

Japanese I Company has been developing blue dopant since 1995. At present, the company has more than 30 patents related to blue dopant (based on Japanese application for a patent), and its major 8 patents are valid until 2034. In particular, it has an exclusive patent for the combination method of blue dopant that includes blue host and pyrene with an anthracene structure (a compound in which three benzene rings are sequentially bonded). For this reason, the panel makers which purchase dopant from I Company must buy its host. If they mix I Company’s blue dopant with another company’s host, it is inevitable to infringe the patent in the case a host material has an anthracene skeleton.

Both Samsung Display and LG Display have been using I Company’s blue dopant and host.

The blue dopant developed by Material Science is designed to make molecules that are completely out of I Company’s compound patent. Conventionally, the method of applying an electron acceptor to a molecule has been used to improve the efficiency and lifetime of OLED and have a blue color.
On the other hand, Material Science introduces electron donor into molecules to improve the efficiency and lifetime while generating dark blue color. This dopant greatly reduces the solvent-dependent color development (solvatochromism) where emission wavelength changes due to the polarity of the surroundings. Therefore, the change of emission wavelength is also greatly reduced.

Jung Jae-ho, a researcher at Material Science said, “We have developed a new structure and a synthesis method, which makes it possible to produce its differentiated dopant.” “Panel companies are now able to utilize various types of blue hosts”. In addition, Material Sciences has been recently developing TADF(Thermally Activated Delayed Fluorescence) that OLED panel makers are struggling to introduce for the longer life of blue-emitting phosphors.

<OLED emitting material market forecast, UBi Research>

According to UBi Research, the OLED organic market is expected to reach $ 3.36 billion by 2021 (about 3.8 trillion won). And blue materials account for 11.5% of total sales.