Material Science Co., Ltd. develops high-purity blue light-emitting material with a half width of 11 nm

In OLEDs which are currently leading the display industry for mobile devices and TVs, blue material is still using fluorescent material unlike red and green.

Currently, a lot of light emitting material companies are trying to improve the efficiency, lifespan, and color purity of blue light emitting materials, also next-generation materials such as phosphorescence, TADF, and hyper-fluorescence as well as actively developing luminous efficiency by controlling emission wavelengths.

Material Science (hereinafter referred to as MS), a Korean company that has been developing blue light emitting materials since 2015, has recently focused on realizing high color purity and successfully developed high color purity blue light emitting materials with a light emission wavelength of 460 nm and a half width of 11 nm. Considering that the emission wavelength of the currently commercially available blue material is about 20 nm, the blue material of MS is expected to receive great attention.

The full width at half maximum (FWHM) is an expression of the extent of function given by the difference between the two extreme values of the independent variable at which the dependent variable is equal to half of its maximum value.

And the narrower the half width, the higher the purity.

A typical example is Samsung Electronics’ QLED TV, which has significantly improved color reproduction by applying a QD sheet to the LCD back light.

The blue light emitting material developed by MS is expected to be applicable not only to fluorescent materials but also to hyper-fluorescence, which is attracting attention as a next-generation blue material according to emission wavelength control.

<Comparison of the half width of the existing blue dopant with the half width of the blue dopant developed by MS, Source: Materials Science>

Deuterium substitution blue, will be next generation blue materials?

Fluorescent blue emitting material is the only fluorescent material used in small and medium-sized OLEDs and large-area OLEDs.

Development of next generation emitting materials such as TADF and hyper-fluorescence is also in progress, but deuterium substitution technology has got attention since it is adopted to Samsung Galaxy S20.

Deuterium substitution technology is to replace hydrogen with deuterium in a compound combined with existing hydrogen, and each company has a difference in substituting the compound before or after synthesis or substituting the whole. Representative development companies for deuterium substitution include Idemitsu Kosan, DuPont, SFC, and JNC.

As related patents, compounds substituted with deuterium with an atomic mass of deuterium that is twice as high as hydrogen have lower zero-energy and lower vibrational energy than those combined with hydrogen, resulting in lower ground-state energy and weaker intermolecular interactions, resulting in a thin film in an amorphous state. It is effective in improving the life of OLED.

It is expected that the OLED device to which the deuterium-substituted compound is applied can improve the lifetime by more than 20% compared to the previous one.

Molecular Glasses Receives U.S. Patent 10,593,886 For Improved OLED Device Lifetime

The U.S. Patent Office has awarded patent number U.S. 10,593,886 to Molecular Glasses, Inc. for “OLED Devices with Improved Lifetime Using Non-Crystallizable Molecular Glass Mixture Hosts”

<Improved OLED device lifetime using OLEDIQ™, Source: molecularglasses.com>

The present invention provides an OLED multilayer electroluminescent device that includes a cathode, an anode, a light-emitting layer (LEL) disposed there between, and charge-transporting layers disposed between (A) the cathode and the light-emitting layer, (B) the anode and the light-emitting layer, or (C) both (A) and (B). The light-emitting layer (LEL) includes a host material and an emitter. The host material includes a high-entropy non-crystallizable molecular glass mixture, which includes hole-transporting capabilities, electron-transporting capabilities, or ambipolar capabilities. The ambipolar capabilities include hole-transporting capabilities and electron-transporting capabilities.

According to Mike Molaire, Molecular Glasses’ CEO and Founder, “OLEDIQ™ materials are amorphous, soluble small molecules that are non-crystallizable, which prevents aggregation of dopant emitters. This means OLEDIQ™ produces significant improvements in OLED lifetime and high reliability. This is an ideal platform for high-efficiency, long-lasting blue OLED. OLEDIQ™ materials can be used for both the vacuum-thermal deposition production process, as well as inkjet printing without any modification”.

 

Canon enters OLED materials business

Canon is considering the OLED materials business as the adoption of OLED panels such as smartphones and TVs is spreading. OLED panels are used in electronic finders in Canon’s mirrorless cameras.

Although no specific production date has been announced, the company will focus on research and development, group companies in Fukui Prefecture, and Fukui Canon.

Canon Tokki, the No. 1 OLED evaporator market share, is a subsidiary.

Canon is developing TADF luminescent materials as Cu-complex compounds. (Japanese Patent JP2011213643A)

[Press Release] Opening Ceremony of new Novaled Headquarters(Dresden, Germany, June 2019)

Investment of 30 million Euros in Novaled Headquarters with state-of-the-art R & D center for OLED cutting-edge technology in Dresden, Germany

After 2 years of construction Novaled GmbH opened its new headquarters in Dresden on June, 12th together with long-standing business partners and supporters. Besides representatives of Samsung SDI, the Prime Minister of Saxony, Michael Kretschmer, and the First Mayor of the city of Dresden, Dirk Hilbert, participated in the event.

Core of the 10,200 m² premises in the northern part of the city is a 110 m long R & D center with chemistry laboratories as well as cleanrooms of class ISO5 and ISO7 equipped at highest standards. The new location is an improvement all along the line. Additional space in cleanrooms allowed for investments in cluster tools. This increased the OLED processing capacity by around 40%. The generously planned chemistry laboratories with state-of-the-art equipment and proprietary analytics are a true quantum leap in the development of new materials for high-performance OLEDs.

Novaled is currently the only supplier of organic dopants for OLED display mass production in the industry. Know-how and materials from Dresden enhance therefore most high end smartphones, TVs and smart watches, equipped with OLED displays.

“State-of-the-art cleanrooms, three times more lab space and entirely new facilities offer the best conditions for innovation,” said Novaled CEO Gerd Günther. The company started back in 2003 with five key patents concerning organic electronics. Meanwhile there are nearly 1,000 Novaled patents granted or pending. “Our technologies and materials are established as an industry standard in the OLED display field,” said Gerd Günther. “Novaleds revenues clearly show that we are growing even stronger than the market.”

In addition to the construction of a new technical center, the former mill of the army bakery was extensively renovated and Novaled employees get to work there in loft-like, bright offices. A green outdoor area offers an attractive environment for meetings and relaxation. During the opening ceremony, a birch tree was planted by Novaled CEO Gerd Günther, Samsung SDI Executive Vice President Dr. Hyuk Chang , the Prime Minister of Saxony, Michael Kretschmer and the First Mayor of Dresden, Dirk Hilbert and. “The birch is a known symbol for light and a new beginning, representing what we do in our new premises,” explained Gerd Günther.

About Novaled

Novaled GmbH is a leader in the research, development and commercialization of technologies and materials that enhance the performance of OLEDs (organic light-emitting diodes) and other organic electronics. Novaled offers OLED product manufacturers a unique combination of proprietary technology, materials and expertise, and is currently the only company in the OLED industry licensing and selling organic conductivity doping technology and materials for use in the commercial mass production of display products. Novaled has developed strategic partnerships with key OLED innovators and producers throughout the world and, with a broad portfolio of more than 980 patents granted or pending, has a strong IP position in OLED technologies, structures and materials. Novaled is headquartered in Dresden with some 135 staff and offices in Asia. Since end of 2013 Novaled belongs to Samsung. www.novaled.com

 

About OLEDs

OLEDs (organic light-emitting diodes) are solid-state devices composed of multiple thin layers of organic materials often only a few nanometers thick that emit diffuse light when electricity is applied to them. Because they are an area light source, OLEDs are a key part of fulfilling the dream of the rapidly growing flat panel display market: paper-thin, highly-efficient displays with brilliant colors and excellent design flexibility. OLEDs may also lead to innovative decorative lighting applications and personalized environments. www.novaled.com/oleds/

 

OLED emitting materials market to grow to $ 1.71 billion in 2019

OLED light emitting materials market is gradually increasing as Chinese companies enter OLED panel market led by Samsung Display and LG Display.

The 2019 OLED emitting material report, published by UBI Research, predicts that the emitting material market in 2019 will reach $ 1.17 billion. 2021 and 2023 are expected to grow to $ 1.87 billion and $ 2.0 billion, respectively.

The size of light emitting materials consumed by Korean companies will account for 70.2% in 2019 ($ 0.82 billion), and its share will increase to 75.6% in 2023.

Korea’s emitting material market is growing because the consumption of OLED materials for TVs is soaring. In 2019, 21.1% of light emitting materials for TVs are expected to increase to 49.7% in 2023.

What is the cost of OLED materials for the Galaxy F?

What will be the price of foldable phone Galaxy F, which is expected to be on the market this year, is a concern for people around the world. Samsung Display is the only company that can mass-produce Foldable OLEDs with in-folding type used by Galaxy F.

Galaxy F with 7.29-inch OLED is a digital convergence product that can simultaneously target the smartphone and tablet PC market. The initial sale price will be around $ 2,000, and the estimated sales volume is about 1 million units this year.

The OLED industry is interested in how much the Galaxy F’s foldable OLED panels (including modules) will cost.

According to UBI Research’s material cost analysis data, Samsung Display’s foldable OLED material cost is 2.04 times higher than the Galaxy S10 5.8 inch. This is because the display area has increased, and the yield has been reduced.

Galaxy F, Galaxy S10, and iPhone XS’s flexible OLED material cost analysis shows that the module cost of iPhone XS is the highest at 95.2%, Galaxy S10 at 92.2% and Galaxy F at 89.3%.

JOLED, Introduced Many Inkjet OLED Technologies

This was the first time for JOLED to demonstrate its products and technologies at FINETECH Japan 2018.

JOLED, which received the inkjet OLED technology from Panasonic and is doing OLED panel business, has been selling medical monitors since early this year. Next year, Asus is also scheduled to sell inkjet OLED TVs made by JOLED.

Its exhibited products include medical OLED monitor, OLED monitor for games, automotive OLED and 3 kinds of OLED TVs.

JOLED’s Inkjet OLEDs have a peak intensity of 350 nit. In case of full white, it is 140 nits, but has sufficient brightness for monitor applications.

JOLED will build mass production lines next year to produce OLEDs for 20-inch monitors and TVs as a full-scale. It also plans to start OLED business for automobiles after 2020.

JOLED is the only company producing OLED panels manufactured by inkjet technology. JOLED is also promoting the license business by providing this technology to Chinese, Japanese and Taiwanese panel makers.

[ICEL 2018] TADF attracts attention as next generation emitting material

In addition to monitors and virtual reality devices, OLED is gradually expanding its domain beyond smartphones and TVs, inclusive of the application of side-mirror OLED in automobiles. As new OLED applications are increased in various environments, it is essential to develop technologies to satisfy users.

In ICEL 2018, which is being held at Jeju International Convention Center from October 15th, many presenters and attendants emphasized that material development is essential to improve the performance of OLED as the OLED market grows more. As an alternative material, TADF (Thermally Activated Delayed Fluorescence) is mentioned.

First, Hwang Seok-Hwan, chief researcher in Samsung Display said that TADF is to be a good resolution as one of emitting materials for new deposition process, referring to the continued growth of OLED panel and material market.

Hwang said that the efficiency of fluorescent Blue is almost saturated, so 100% luminance efficiency can be obtained theoretically by applying TADF with the advantages of not using expensive rare earth metals. He added that improvement of material stability, improvement of color purity by using boron material, development of host having high triplet energy need to be superseded.

Also, CYNORA, a leading TADF developing company, disclosed the performance of dark blue TADF developed so far.

CYNORA said that the luminance efficiency and color purity of dark blue TADF reached the level that the related companies required, and that its current goal is to develop the technology to improve lifetime. In addition, based on this know-how, the company will quickly develop green and red TADF, and now green TADF has been delivered to several customers as a sample.

Merck confirmed that TADF is the most powerful luminescent material to replace fluorescent Blue at its presentation together with a poster about TADF.

OLED companies and research institutes are focusing attention on whether blue TADF can quickly enter OLED market and upgrade OLED performance further.

[ICEL 2018] What are the future challenges for LG Display to improve OLED TV performance?

At ICEL 2018, held at Jeju International Convention Center from Oct. 15, Soo-Young Yoon, Vice President and Head of LG Display Laboratory, presented the challenges for the OLED TV performance improvement and price reduction

Yoon said “In 2018, the future prospects of OLED TVs have changed more positively compared to that in 2016. In 2013, only LG Electronics was an OLED TV set maker. The number of OLED TV set makers has steadily increased; ten in 2016, and fifteen in 2018. Many TV set makers are choosing OLED. ”

He added that although OLED TV is on the track of success with lots of improvement, it has to be further developed. The challenge is the improvement for high brightness, color reproduction rate and with the development of 8K resolution. Also he mentioned that the price reduction is to be necessary.

Yoon explained that the development of components such as driver IC and controller is an important task to develop 8K OLED TV. In order to improve the brightness, color reproducibility, and lifespan, TADF and phosphorescent Blue are to be good alternatives for improving the RGB emitting materials. The enhancement of out-coupling is also important.

In addition, he referred to the solution processed OLED as a technology, to compete against LCD TV price, with the necessity of developing inkjet equipment, process, and soluble materials. For this, it is required to develop the ink jet equipment and shorten the process time for mass production, but the performance and reliability of the soluble materials will be more important.
Finally, he commented that the company will focus on 8K OLED TV and rollable OLED TV with the improvement of brightness until 2020. After 2022, the company will develop the OLED TV which has an enhanced brightness of 300 nits or more, a color gamut that satisfies BT.2020, and a lifespan of more than 30,000 hours.

[IMID 2018] LG Display, showcased 2-stack RGB OLED for automobile OLED with improved life span.

At IMID 2018 held in BEXCO, Busan on August 29, Kim Kwan-Soo, research fellow of LG Display presented about a new OLED technology for automotive displays.

Kim said that RGB OLEDs applied to mobile devices and WRGB OLEDs applied to TVs do not satisfy customers’ needs in terms of life span. To solve this issue, he introduced 2 stack RGB OLED in which RGB OLED has the same tandem structure as WRGB.

Because 2 stack RGB OLED can be thick due to adding a layer of CCL (charge generation layer) to the multi-layer structure, HTL is made thinner than before and the charge balance of the emitting layer is optimized.

As a result, the 2-stack RGB OLED shows 1.5 ~ 2 times higher emitting efficiency than the 1-stack RGB OLED. Its lifetime is increased by 4 times on T80 basis.

However, the 2-stack structure has a disadvantage in that it has higher power consumption than the general structure. Thus, it is necessary to make efforts to solve this disadvantage.