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Next-generation emitting materials, development is under way.

At the 4th OLED KOREA CONFERENCE, Kyulux and CYNORA, the leaders in the development of next generation emitting materials, announced the results of research and future development directions.

Junji Adachi, CEO of Kyulux, said, “We are developing Hyperfluorescence in the form of adding a TADF dopant to the existing fluorescent host and dopant.” He also emphasized that the emission FWHM (full width at half maximum) of Hyperfluorescence is about 35% of that of TADF, and the luminance is about twice as high, and this material can solve the drawbacks of TADF (wide FWHM and low luminance) at the same time.

The latest Hyperfluorescence, which Jundi Arachi introduced, has efficiencies of red 28 cd /A, yellow 43 cd/A, green 81 cd / A, and life span is 10,000 hours, 62,000 hours, and 48,000 hours based on LT50 (1000nit) respectively. The color coordinates are red (0.64, 0.36), yellow (0.46, 0.52), and green (0.28, 0.65).

Andreas Haldi, CYNORA’s Chief Marketing Officer of CYNORA, said that the blue TADF emitter developed by CYNORA now has a color coordinate of 0.16, EQE of 24% and 10-hour lifetime (LT97 @ 700nit).

The performance is more than twice as efficient as the blue material currently used in OLEDs, and the color coordinates (0.10) are similar but the lifespan is short. He added that the Blue TADF emitter is scheduled to be developed within 2018 and will be available for mass production in 2019.

He also mentioned that the manufacturing cost is reduced and the power consumption is reduced, thereby minimizing battery consumption if blue TADF emitters with high efficiency are used instead of conventional low-efficiency blue materials. At the same time, it is expected to be able to improve the resolution of OLEDs and be applied to large-scale vacuum processing lines of major panel makers.
According to CYNORA, next step is to develop green TADF emitters (2019) and red emitters (2020) after finishing the development of blue TADF emitters (2018). Thus, it might be completed ‘RGB TADF emitter development’ by 2020.

OLED display to embroider the blue sky and stars inside the plane

“OLEDs will be installed on the ceilings and walls of planes to provide customers with a variety of images. It is expected that stars will shine in the ceiling at night and clear blue skies during the day time inside the future airplane.”

Dr. Julian Chang, associate tech fellow of Boeing, presented various advantages of OLED to be applied to the inside of planes in future at the ‘2018 OLED Korea conference’ hosted by UBI Research on March 7~8.

Explaining “OLEDs are capable of full black implementation and excellent color reproduction”, Dr. Julian said that “We can provide customers with realistic blue skies and night skies.” “The planes have a lot of curved surfaces, so easy-to-implement OLEDs have advantages over other displays.”

He also emphasized the advantages of OLED which are helpful to provide information, without limit of viewing angle, to customers and crews who need a lot of information in a narrow space, reduce the blue light that interferes with sleeping, and reduce fuel consumption and carbon dioxide with lower power consumption than LED.
On the other hand, he commented that it is necessary to improve the maximum luminance, reduce the burn-in phenomenon, satisfy FAA regulations, and facilitate easy installation and repair in order for OLED to enter the airplane industry.
Today, OLEDs are expanding beyond mobile devices and premium TVs into automotive and wearable markets. Attention is growing whether customers are given a new experience to taste the realistic sky as OLED is applied to the interior of the plane.

차세대 발광재료, 개발 어디까지 왔나

2018 OLED KOREA CONFERENCE에서 차세대 발광재료 개발 선두 주자인 Kyulux와 CYNORA가 연구결과와 앞으로의 개발방향을 발표하였다.

Kyulux의 CEO, Junji Adachi는 ‘기존의 형광재료 host와 dopant에 TADF dopant를 첨가하는 형태의 hyperfluorescence를 개발하고 있다’고 설명했다. hyperfluorescence의 발광 반치폭은 TADF의 약 35% 수준이며, 휘도는 약 2배이상이며, 이 재료가 TADF가 가진 단점(넓은 반치폭과 낮은 휘도 등)을 동시에 해결할 수 있다고 강조했다.

Junji Adachi가 공개한 최신 hyperfluorescence의 효율은 red 28 cd/A, yellow 43 cd/A, green 81 cd/A이며, 수명은 LT50(1000nit)기준 10,000시간, 62,000시간, 48,000시간이다. 색좌표는 red (0.64,0.36), yellow(0.46, 0.52), green(0.28, 0.65)이다.

한편, CYNORA의 chief marketing officer, Andreas Haldi는 현재 CYNORA가 개발한 blue TADF emitter의 색좌표는 0.16, EQE는 24%, 수명(LT97@700nit)은 10시간이라 밝혔다.

이러한 성능은 현재 OLED에 사용되는 blue 재료보다 효율은 2배 이상 높으며, 색좌표(0.10)는 비슷한 수준이나, 수명은 부족하다고 설명하였다. Blue TADF emitter는 2018년 개발이 완료되어 2019년 양산에 적용될 것이다고 덧붙였다.

또한, 기존의 낮은 효율을 갖는 재료 대신 고효율의 blue TADF emitter를 사용한다면, 제조단가가 감소할 뿐만 아니라 소비전력이 감소되어 배터리 소모를 최소화 할 수 있다고 말했다. 동시에 OLED의 해상도를 향상시킬 수 있어 주요 panel 업체의 대규모 진공 공정 라인에 적용될 수 있을 것으로 기대된다고 언급했다.

CYNORA는 blue TADF emitter가 개발 완료(2018)된 후, green TADF emitter, red TADF emitter 순으로 개발, 2020년까지 RGB TADF emitter 개발을 완료할 예정이다.

 

비행기 내부에 푸른 하늘과 별을 수놓아 줄 OLED display

“OLED는 천장과 벽 등에 설치되어 고객들에게 다양한 이미지를 제공할 것이다. 미래의 비행기 내부에서는 밤에 천장에서 별이 빛나고 낮에는 맑고 푸른 하늘을 볼 수 있을 것으로 기대 된다.”

지난 8일 유비리서치 주최로 열린 ‘2018 OLED Korea conference’에서 Boeing의 associate tech fellow인 Julian Chang 박사는 이처럼 언급하며 향후 비행기 내부에 적용 될 OLED의 다양한 장점들을 언급했다.

Julian Chang 박사는 “OLED는 완벽한 블랙 구현과 뛰어난 색 재현율이 강점이다”라며 “고객들에게 실제와 같은 푸른 하늘과 밤 하늘을 제공할 수 있다”고 설명했다. 또한, “비행기에는 곡면이 많기 때문에 flexible 구현이 용이한 OLED가 다른 디스플레이보다 강점을 가지고 있다”고 언급했다.

이어서 협소한 공간에서 많은 정보를 필요로 하는 고객과 승무원들에게 OLED는 시야각 제한 없이 정보를 제공할 수 있을 것이라 설명하였으며, 수면을 방해하는 blue light의 저감 효과와 LED 보다 낮은 소비전력으로 연료 절약과 이산화탄소 절감이 가능하다고 장점들을 열거하였다.

한편, OLED가 비행기 산업 내부로 진출하기 위해서는 최대 휘도 향상과 burn-in 현상 절감, FAA 규정 만족, 설치와 수리의 용이함 등이 필요하다고 언급하였다.

현재 OLED는 mobile 기기와 premium TV 시장을 넘어 automotive와 wearable 시장으로 그 영역을 점점 넓히고 있다. OLED가 비행기 내부에도 적용되어 고객들에게 실제 하늘을 체험 할 수 있는 새로운 경험을 제공할지 귀추가 주목된다.

Blue TADF emitters getting ready for commercial production

Next week, the leading OLED players will meet in Seoul at the 4th OLED Korea Conference and discuss new technologies for next-generation displays. One of the most exciting new technologies is the TADF (Thermally Activated Delayed Fluorescence) technology and this topic will be not missing at this conference, which is hosted by UBI Research.

The TADF technology is receiving much attention as the main method for improving efficiency of blue emitting materials. High-efficiency blue OLEDs are currently missing on the market and the demand for this material is constantly growing year by year.

A high-efficiency TADF blue would enable display manufacturers to reduce the power consumption of the display. Thus, consumers would benefit from a longer battery life of their mobile devices and less energy consumption in large displays. Additionally, an efficient blue would enable to make smaller blue pixels to yield the same amount of light, which would pave the way again to increase the resolution and to offer a better picture quality. Both improvements could significantly increase consumer satisfaction. CYNORA, the current leader in TADF, has shown that its TADF blue material surpassed previous achievements of high-efficiency blue emitters. The latest performance of CYNORA’s materials is getting very close to the customer requirements and thereby also to the market entry barrier. An update of the status of CYNORA’s TADF emitters and their implementation into next-generation AMOLED displays will be shown by the CMO, Dr. Andreas Haldi, during his talk at the OLED Korea Conference. Dr. Haldi will present the newest OLED device results with a deep blue material and disclose some more details on how CYNORA is working very closely with the OLED manufacturers towards mass production.

This most challenging material, efficient blue, is on everybody’s radar as a better efficiency in the blue region is one of the main barriers to OLEDs improvement. But besides blue, TADF materials are also expected to reach the market requirements for green and red in the next couple of years. Thus, TADF can be used efficiently for all RGB pixels, which is something no other emitter technology was able to do so far.

상업적인 생산 준비중인 블루 TADF(열 활성 지연 형광물질) Emitter

다음 주, 주요 OLED 산업 관계자들은 서울에서 열리는 제 4 회 OLED Korea Conference에서 차세대 디스플레이 관련 새로운 기술에 대해 논의할 예정이다. 가장 흥미 있는 새로운 기술 중 하나는 TADF (열 활성 지연 형광) 기술이며, 이 주제는 UBI Research에서 주최하는 이번 컨퍼런스에서 놓치지않고 다루어 질 것이다.

TADF 기술은 청색 발광 물질의 효율을 개선하기위한 주요 방법으로서 많은 주목을 받고있다. 고효율 블루 OLED는 현재 시장에 나와 있지 않으며, 이 소재에 대한 수요는 매년 지속적으로 증가하고 있다.

고효율 TADF 블루는 디스플레이 제조업체가 디스플레이의 전력 소비를 줄일 수 있게 한다. 따라서 소비자는 휴대 기기의 배터리 수명을 연장하고 대형 디스플레이에서 에너지 소비를 절감할 수 있다.  또한 효율적인 블루를 사용하면 동일한 양의 빛을 산출 할 수 있는 보다 작은 블루 픽셀을 만들 수 있으므로 해상도를 높이고 화질을 향상시킬 수 있다.

이러한 두 가지의 개선 사항은 소비자 만족도를 크게 높일 수 있다. TADF의 선도업체인 CYNORA는 TADF 블루 소재가 고효율 블루 Emitter의 이전 성능을 넘어섰다는 것을 보여주었다. CYNORA 재료의 최신 성능은 고객의 요구 사항에 매우 근접하고 있으며, 따라서 시장 진입의 장벽이 될 수도 있다. CYNORA의 TADF Emitter 현황 및 차세대 AMOLED 디스플레이로의 구현에 대한 업데이트는 OLED Korea Conference 에서 CYNORA의 CMO인 Andreas Haldi 박사에 의해 발표 될 것이다.  Haldi 박사는 효율적인 블루 재료의 최신 OLED 디바이스에 대한 적용 결과를 설명하고, CYNORA가 대량 생산을 위해 OLED 제조업체와 긴밀하게 협력하는 방안에 대해 자세히 언급할 예정이다.

기술적으로 가장 도전적인 물질인 효율적인 Blue는 모든 관계자의 관심이 집중되는 분야로서, Blue 영역에서의 더 나은 효율성은 OLED 개선의 주된 장벽 중 하나이다.

그러나 Blue 이외에, TADF 재료는 앞으로 몇 년 안에 Green과 Red에 대한 시장 요구 사항에 도달 할 것으로 예상된다.  따라서 TADF는, 지금까지 Emitter기술이 할 수 없었던, 모든 RGB 픽셀에 대해 효율적으로 사용될 수 있다.

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.

LG Display, strategic partnership for OLED business with Japanese firm Idemitsu Kosan

LG Display (CEO Sang-beom Han, 韓相範 / www.lgdisplay.com) and OLED materials firm Idemitsu Kosan (CEO 月岡隆, Takashi Tsukioka, hereinafter “Idemitsu”) entered into the agreement on the 11th about the ‘mutual cooperation concerning OLED technology and related patent license’ to further strengthen their competitiveness in the OLED industry.

 

In 1997, Idemitsu developed what was then the world’s brightest blue light organic emitting material for OLED and since then, every effort has been made to develop high-tech OLED materials and diverse device technologies based on its own molecular design and organic synthesis technologies. Consequently, Idemitsu Kosan, the original OLED material technology firm of a top global level possesses numerous major patents in relation to the OLED technology.

 

Through this strategic partnership, LG Display will be accessible to the excellent OLED materials and device structures of the Idemitsu Kosan which will lead to consolidate the research, product development and production of the OLED for TV and flexible OLED, and this eventually will accelerate the expansion of OLED market. By providing high performance OLED materials to the LG Display and collaborating in terms of technology development and commercialization, Idemitsu Kosan is expected to secure leading global clients in the display field.

 

The industry prospects that the two companies have made a chance to perform sound leadership by maximizing the synergy in the OLED business through this partnership.

 

Sang-deok Yeo, president of LG Display OLED Business unit said that, “Through the latest partnership, LG Display is to gain momentum to create OLED TV market on the basis of the OLED related patents of Idemitsu Kosan as well as accelerate the developments of flexible and transparent OLEDs” and added that “This win-win collaborative relationship is expected to have a huge synergy effect on OLED business for both companies.”

Yamagata University develops low-voltage blue phosphorescence material

According to a Japanese media, Nikkei, organic device engineering professor Junji Kido of Yamagata University has developed a low-voltage blue phosphorescent material. It is a material that can be driven with a low-voltage of 2.5V and its external quantum efficiency is high as 30%.

Yamagata University has published a paper on a new material on a science magazine, 『Advanced Materials』, issued on June 27th, 2014. The peak of this materials wavelength is 474nm (band gap is 2.62eV) and the reduction of quantum efficiency is small in high brightness zone. Also, the external quantum efficiency is 30% in 100cd/m2 and 20% efficiency can be maintained in high brightness of 10,000cd/m2.

Yamagata University actively develops TADF (Thermal Activation Delay Fluorescent) technology, which makes fluorescent material to realize the similar efficiency close to phosphorescent material, and white OLED using printing technology other than the blue phosphorescent material.