Silicone Better than Acrylic for Flexible OLED…Momentive Introduces InvisiSil

Momentive demonstrated InvisiSil at SID 2016 (Source = Momentive)

Momentive demonstrated InvisiSil at SID 2016 (Source = Momentive)

 Hyunjoo Kang / jjoo@olednet.com

One of the issues of flexible OLED actualization is acrylic’s vulnerability against lower temperature, and silicone is emerging as a solution. Meanwhile, Momentive is attracting attention with their promotion of silicone based InvisiSil.

One of the key encapsulation technologies for flexible OLED is TFE (thin film encapsulation) that laminates thin inorganic and organic films, used by Samsung Display. Of these, organic material is formed through inkjet OLED process using acrylic materials. However, acrylic organic materials are easily broken under 0 ℃, which leads to difficulties in producing flexible OLED using these. However, silicone based materials can withstand up to -40 ℃ and are considered strong candidate for acrylic replacement.

Momentive is a company that develops such silicone based materials. In SID 2016 (22-27 May), Momentive opened an exhibition booth and presented InvisiSil Snap Cure silicones. The InvisiSil Snap Cure systems can cure rapidly at room temperature without UV exposure.

Momentive explained that for flexible AMOLED panel to move past edge type and toward true flexible such as foldable and rollable, silicone is much better suited than acrylic. Furthermore, they added that silicone based materials have yet revealed any disadvantages compared to acrylic, and that it is in development for continued application to mass production.

CYNORA, significant progress in blue materials for OLEDs…EQE 16.3%

Source : CYNORA

Source : CYNORA

Hyunjoo Kang / Reporter / jjoo@olednet.com

CYNORA, a leader in TADF (thermally activated delayed fluorescence) materials, has made significant progress in its highly efficient blue material developments during the last 6 months: a strong indicator for reaching performance levels requested by the OLED industry.

CYNORA has been working on organic TADF emitting materials during the last 5 years.

Since 2015, CYNORA applies its experience to develop pure organic highly efficient blue dopants for vacuum deposition.

The TADF technology combines high efficiency (3 times better than the state-of-the-art fluorescence technology) together with long lifetime.

OLED displaysincorporating blue TADF materials will reduce power consumption up to a factor of 2.

CYNORA has developed deep blue material reaching an EQE of 16.3% (at 100 cd/m2) compared to 3% reached in October 2015, a factor 5 improvement in six months. In parallel, the company is using sky blue material to improve the device lifetime.

A significant increase in the lifetime to more than 400 h (LT50, 500 cd/m2) has recently been achieved from a level of a few minutes in last October.

“We have yet to reach the performances requested by the OLED display industry” says Thomas Baumann, CYNORA’s CSO, “but our rapid progress during the last 6 months proves our capability to reach the performance levels we have defined together with our key customers to support their technical roadmap. We will use the coming months to combine both efficiency and lifetime in a single deep blue material.”

CYNORA owns a broad IP portfolio on TADF with over 100 patent families and is aiming for over 600 patents.

UDC’s 2015 OLED Emitting Materials Revenue $ 113 million, a 11% Decrease…Still Leading Market

Source : UDC

Source : UDC

Hyunjoo Kang / Reporter / jjoo@olednet.com

UDC (Universal Display) that is dominating the global OLED emitting materials market, recorded 11% reduced OLED emitting materials revenue in 2015 compared to 2014. Despite the decreased revenue, it maintained its top place in the market.

According to 2016 OLED Emitting Material Annual Report, published by UBI Research, UDC recorded approximately $ 113 million in 2015 OLED emitting materials revenue. In 2014, this company’s OLED emitting materials revenue recorded $ 127 million and led the global market, and maintained its position in 2015.

In particular, this company is a dominating presence in dopant materials sector. In 2015, UDC occupied 82% of the dopant materials sector, and the rest of the companies share the remaining 18%. Based on the phosphorescent patents, it is supplying phosphorescent red and green dopant to Samsung Display and LG Display.

Following UDC’s top place in 2015 global OLED emitting materials market in terms of revenue, Idemitsu Kosan ranked 2nd, and this was followed by Novaled, Dow Chem., and Samsung SDI. In 2013, Dow Chem. was at the top of the market, but since 2014 UDC overtook the leadership. In 2016, LG Display’s OLED TV mass production line operation rate, materials structure of Galaxy Note series to be mass produced in H2, and other factors are expected to affect the OLED emitting materials market.

UDC is scheduled to announce 2016 Q1 performance on 5 May (local time).

 

2015 OLED Emitting Materials Market, Dow Chem and LG Chem in Slump…Why?

Hyunjoo Kang / Reporter /jjoo@olednet.com

 

Source: UBI Research, 2016 OLED Emitting Materials Annual Report

Source: UBI Research, 2016 OLED Emitting Materials Annual Report

 

In the midst of UDC`s domination of 2015 global materials market, with Japanese Idemitsu Kosan`s rapid growth and slump of emitting materials companied, there has been changes to the enviroment.

According to [2016 OLED Emitting Materials Annual Report] to be published by UBI Research in mid-April, the 2015 global emitting materials market recorded approximately a 17% growth compared to 2014

 

 

UDC’s revenue decreased from previous year, but remained at the top, the same as 2014. UDC was closely followed by Idemitsu Kosan despite its fourth place in 2014.

Such growth of Idemitsu Kosan is mainly due to its supply expansion in regards to Korean companies such as Samsung Display and LG Display. In 2015, Idemitsu Kosan began actively supplying Samsung Display with blue materials. Together with the increase in Idemitsu Kosan’s client LG Display’s OLED panel for TV mass production line’s operation rate, Idemitsu Kosan’s supply increased.

 

2015 Global OLED Emitting Materials Market Ranking Source: UBI Research, 2016 OLED Emitting Materials Annual Report

2015 Global OLED Emitting Materials Market Ranking
Source: UBI Research, 2016 OLED Emitting Materials Annual Report

 

◆ Samsung Display to Determine Up and Down of Companies

On the other hand, some OLED emitting materials companies that ranked high until 2014 showed poor performance. Dow Chem., that reached the second place in 2014 after UDC in revenue, fell to the fourth place in 2015 due to a big sales decrease. The third and fifth companies in 2014, LG Chem and Duksan Neolux respectively, fell below fifth place in 2015 due to the same reason.

Dow Chem. and Duksan Neolux are analyzed have recorded sales decrease in comparison to 2014 due to the supply chain changes of Samsung Display. In the case of LG Chem, the sales fell as the Samsung Display’s supply volume decreased.

However, Samsung SDI recorded sales increase, and entered within the top 5 in 2015. This company’s performance improved as it supplied Samsung Display with green host.

The company that recorded greatest growth is a Germany company Novaled that Samsung SDI, then Cheil Industries, took over. This company recorded approximately 150% revenue increase compared to previous year, and reached the third place in 2015 following UDC and Idemitsu Kosan. With the increase in OLED panel for TV mass production line’s operation rate, Novaled’s revenue greatly increased.

UBI Research estimated that in 2016, LG Display’s OLED TV mass production line operation rate and Galaxy Note series’ material structure, to be mass produced in the second half, will greatly affect revenue of OLED emitting materials companies.

CYNORA focuses on blue TADF-materials

During the 2nd OLED Korea Conference, the Germany-based CYNORA has presented its current status in blue TADF-based OLED-emitter development.

CYNORA focuses on materials that are able to convert triplet excitons into light via Thermally Activated Delayed Fluorescence (TADF).  While efficient emitters for red and green are already commercially available from other suppliers, there is still no blue OLED material available to match the strong demand for the industry. TADF technology is a promising candidate for highly efficient and stable blue emitter systems. TADF-based emitters offer up to four times better efficiency than currently used materials, which are based on fluorescence.

CYNORA has shown its current TADF-materials for sampling with good color points in blue (CIE 0.16, 0.17) and sky-blue (CIE 0.19, 0.36). The presented materials confirm that blue emission and high efficiency can be combined. CYNORA is focusing its current material development on vacuum-processing following the customer request, as represented in large investments into this deposition technology by the major AMOLED displays makers.

In order to provide more sample materials to customers, while reducing the cycle times for material improvements, CYNORA is growing its infrastructure. The company is extending the device testing capacity by setting up a new cluster tool and hiring continuous experts for the synthesis and device department. Due these actions CYNORA’s emitter throughput will increase significantly.

The strong interest from the OLED industry in TADF-based blue emitters systems has been once more confirmed at this UBI event and allowed CYNORA to further extend its network with the Korean OLED community.  The present expansion of CYNORA management operations, consistently sampling and improvement of blue OLED materials are further strengthening the position of CYNORA as a technology leader in the field of TADF emitter systems.

[Lighting Japan 2016] What is the Key Issue of Solution OLED Materials?

In Lighting Japan 2016 (January 13-16) conference, Sumitomo Chemical and Merck revealed recently developed soluble OLED materials performance results.

 

The soluble OLED materials efficiency published in this conference reached ≥ 65% of UDC’s evaporation materials; particularly, Sumitomo Chemical’s red achieved ≥ 85%, and green reached ≥ 88% of UDC’s evaporation materials efficiency. Lifetime (LT 95) results were not as good as efficiency with red’s 25% and green’s approximately 40% (average).

 

Sumitomo Chemical and Merck both revealed that although in terms of efficiency the soluble materials almost caught up to evaporation materials, but lifetime requires further development.

 

Solution process is a method that allows for large area OLED panel production in RGB method using ≥ Gen8 manufacturing equipment. Key panel companies are actively carrying out research development, and the performance of soluble OLED material is considered the biggest issue. According to Solution Process OLED Report 2015, published by UBI Research, when solution process is applied the material cost can be approximately 40% reduced compared to the current evaporation process using large area OLED panel. The timing for the solution process application to mass production is expected to be decided depending on the development speed of soluble OLED materials.

 

OLED Materials Performance Comparison

OLED Materials Performance Comparison

Heraeus Materials Reveals Innovative Conductive Polymer Transparent Electrode

Heraeus Materials Korea’s Jinwhan Kim

Heraeus Materials Korea’s Jinwhan Kim

 

By Choong Hoon Yi

 

At 2016 Production/Process Technology Development and Application Cases by Flexible Transparent Electrode and Film Materials Seminar (December 17), Heraeus Materials Korea’s Jinwhan Kim revealed new product of Clevios, Heraeus’ main transparent electrode series, through a presentation titled Conductive Polymer-based Flexible Transparent Electrode Production and Process Technology Development Trend and Application Examples.

 

Transparent electrode possesses high transmittance of ≥ 80% and conductivity of ≤ 500 Ω/ㅁ, and is being used as electronic component for displays including OLED electrode. The transparent electrode can be mainly categorized into 3 types: thin metal film, carbon allotrope, and conductive polymer. Heraeus Materials is considered a major company producing conductive polymer together with SKC.

 

Although many people regard Heraeus as a company producing gold and silver bullion, Kim explained that Heraeus is focusing on display and semiconductor related chemicals. Particularly, Kim added that Clevios, Heraeus’ representative product, contains over 20 years of PEDOT materials know-how and experience.

 

Clevios™ P, the existing PEDOT:PSS product, is mostly produced in Leverkusen, Germany, and essentially uses thermal curing. Kim revealed that when Clevios™ P is coated, it shows bluish hue and the degree changes depending on the thickness. The conductivity is 1,000 S/cm and has the refractive index similar to glass.

 

While the existing Clevios product has sufficient flexibility to be applied to flexible products, Kim reported that future flexible display requires transparent electrode with higher specifications, emphasizing the importance of product development, and introduced new product Clevios™ HY.

 

High conductive transparent electrode, Ag nanowire was added to the existing Clevios PEDOT:PSS product to produce Clevios™ HY. AG nanowire typically has rough surface but Clevios PEDOT:PSS corrects this by making it flat. The highly flexible new product has relatively low sheet tension of less than 100 Ω/ㅁ. Kim emphasized that this new product can be turned to solvent base and used in printing process, revealing they are developing Clevios™ HYJET, a PEDOT:PSS transparent electrode for printing use.

[2015 OLED Evaluation Seminar] How can OLED Emitting Materials, Components and Other Materials Markets Survive?

By Choong Hoon Yi

 

At 2015 OLED Evaluation Seminar (December 4) hosted by UBI Research, Sung-Kee Kang, DS Hi-Metal’s CSO, reported that OLED display market has to expand through OLED TV and new applications in order for OLED emitting materials companies to grow.

 

Presenting under the title of ‘OLED Organic Material Technology, Industry Trend’, Kang introduced the current OLED emitting material value chain. He explained that within OLED emitting materials market, there are too many players considering the current volume and overall OLED display market expansion is a necessity. However, he added that for OLED display to compete against LCD display, OLED TV market has to expand successfully, and new application that utilizes OLED’s characteristics is needed.

 

In order to expand the market, development of OLED emitting materials and other materials is urgently in demand that meet the required conditions. Kang emphasized that at present new technology seeds promotion for the next OLED is needed as well as development of OLED emitting materials, and other flexible/transparent related materials with new functions.

 

Considering LG’s active OLED TV marketing, Apple’s interest in OLED panel application, and possibility for Samsung to apply AMOLED to all models among others, OLED market is anticipated to rapidly grow. Together with this, the industries of OLED emitting material and component/other materials with new functions are also expected to considerably grow.

[Merck Display Insight 2015] Merck Reveals Latest Performance Results for Red and Green Solution Process Materials

On November 5, during the 16th Merck Display Insight 2015 seminar, Merck revealed the development results for solution process materials. The solution process materials presented were red and blue materials’ efficiency, lifetime, and CIE.

 

At present UDC’s evaporation materials are being used in OLED mass production. UDC’s evaporation material performance, published on the company website, were compared with Merck’s materials. Merck’s red material’s efficiency was 19.1cd/A, lifetime was 5,900 hours, and the CIE was (0.66, 0.34) which were approximately 66% of UDC material’s efficiency (29cd/A), 26% of UDC material’s lifetime (23,000 hours), and showed equal CIE.

 

For Merck’s green material, efficiency was 76.4cd/A, lifetime was 5,200 hours, and the CIE was (0.32, 0.63). These were approximately 89% of UDC’s green’s 85cd/A of efficiency, and 29% of 18,000 hours of lifetime. The CIE were similar with UDC’s (0.31, 0.63).

 

The comparison of the published materials’ performance, efficiency of solution process materials are developed to the similar levels as evaporation materials, but material lifetime require more research. Through this seminar, Merck revealed that the LT95’s solution process material’s lifetime will be solution process OLED’s most crucial challenge.

 

During the question and answer part of the poster session, Merck also revealed positive outlook that full stack solution process OLED product will be produced within the next 3-4 years.

 

Despite being one of the latecomers within the OLED material business, Merck is producing notable results in solution process material development and OLED material sales. This year’s sales results are anticipated to be higher than expected.

 

According to 2015 Solution Process OLED Annual Report, published by UBI Research, the key issue for solution process OLED is solution process emitting material performance. The solution process red and green’s efficiency reached to the similar levels as evaporation material. However, lifetime showed to be ≤approx. 30% of evaporation material in LT95. On the other hand, solution process blue is analyzed to be falling behind evaporation material in both lifetime and efficiency. As such, it is estimated that solution process OLED will be mass produced using the hybrid structure where red and green are formed through printing, and blue is formed through evaporation.

What is Solution Process OLED’s Key Issue?

In the 2015 Display Printed Electronics Seminar held in The K Hotel in Seoul on October 7, Dankook University’s Professor Byung Doo Chin and Korea Research Institute of Chemical Technology’s Dr. Jaemin Lee gave presentations. They discussed key issues of solution process OLED; Professor Chin examined technological issues of print OLED/PLED device while Dr. Lee discussed technology trend of solution process OLED device.

 

Professor Chin reported that of the materials being used in current solution process, red, and green progressed greatly in terms of efficiency and lifetime. However, he explained that as blue’s efficiency and lifetime are lower than the other 2 colors, unless these issues improve, white actualization, as well as blue actualization, is difficult and panel cannot properly perform.

 

Material research development can occur for evaporation OLED only through material synthesis and purification. However, for solution process OLED, turning the materials to ink has to be additionally considered. Dr. Lee announced that diverse collaboration are happening between material and ink related companies for these reasons.

 

In the seminar, Professor Chin and Dr. Lee agreed that the key to the solution process OLED development is material characteristics development. According to the solution process material traits presented by Sumitomo Chem. and DuPont, while red and green traits are fast catching up to ones used for evaporation OLED, this is not true for blue. Despite these disadvantages, solution process OLED is a key technology that can produce large area RGB OLED panel using Gen8, or higher, manufacturing equipment; continued research development of solution process technology is expected in future.