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Next-generation emitting materials, development is under way.

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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.

차세대 발광재료, 개발 어디까지 왔나

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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.

 

CYNORA, what is its research and development goal from now on?

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During the 3rd OLED KOREA CONFERENCE, Andreas Haldi of CYNORA presented the research result and future development direction with the topic on Efficient blue TADF emitter: material in high demand.

Andreas Haldi said that he did an in-depth anaylsis on the spectrum characteristic development of deep-blue TADF emitter classification and the interaction between host and guest. He revealed that the EQE (1000nits) of the deep-blue TADF emitter improved from 15% to 24% and life time (500nits) rose to 1000h from 300h.

However, it was mentioned that the efficiency and life time showed a decrease due to material quenching when applying the deep-blue TADF emitter to the OLED. He added that in order to resolve this problem, CYNORA is doing a joint development with a panel company and plans to reach a minimum of 0.2 for CIEy, above 15% for EQE(1000nits), more than 100h for LT97(700nits) by 2017, which is the aim for mass producing a mobile and TV deep-blue TADF emitter.

Andreas Haldi revealed and expected that in the case of using the improved deep-blue TADF emitter, the production unit price and power consumption decreases and at the same time makes it possible to produce an improved OLED display resolution which can be used in large vacuum processing lines of main panel production companies.

He also presented that with the device based light-blue TADF emitter a host and stack which can apply material refining technology and injection, layer, transport layer, and blocing layer was developed.
He ended with that in regard to the future direction of the blue-emitter development it will improve the EL peak to its fullest and set a goal and develop a deep-blue TADF emiiter that has 60nm FWHM and 460nm wavelength range.

As the leading company that has actively done studies on TADF material for many years, CYNORA is focusing on blue emitter material which is the biggest issue of improving the performance of OLED displays.

CYNORA, 앞으로의 연구개발 목표는?

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제 3회 OLED KOREA CONFERENCE에서 CYNORA의 Andreas Haldi는 Efficient blue TADF emitter: material in high demand를 주제로 그간의 연구결과와 앞으로의 개발방향을 발표하였다.

Andreas Haldi는 deep-blue TADF emitter는 분류에 따른 스펙트럼 특성 개발과 host와 guest의 상호작용에 대해 심층 분석하였다고 말했다. 이를 통해 deep-blue TADF emitter의 EQE(1000nits를 기준)를 15%에서 24%로, 수명(500nits 기준)은 300h에서 1000h 수준까지 향상시켰다고 밝혔다.

그러나 deep-blue TADF emitter를 OLED에 적용했을 때 재료의 quenching으로 인해 효율과 수명이 감소하는 현상을 보였다고 언급했다. 이러한 문제를 해결하기 위해 CYNORA는 패널 업체와 공동 개발을 진행하고 있으며, 모바일 및 TV용 deep-blue TADF emitter 양산 목표시점인 2017년 12월까지 CIEy는 0.2미만, EQE(1000nits)는 15%이상, LT97(700nits)는 100h이상 도달할 계획이라 덧붙였다.

Andreas Haldi는 개선된 deep-blue TADF emitter를 사용할 경우 제조단가와 소비전력이 감소함과 동시에 해상도가 향상된 OLED display를 생산할 수 있어 주요 패널 제조 업체의 대규모 진공 공정 라인에 적용될 수 있을 것으로 기대된다고 밝혔다.

또한, light-blue TADF emitter에 대해서는 device를 기반으로 재료 정제 기술과 injection layer, transport layer, blocking layer를 적용할 수 있는 host와 stack를 개발하였다고 말했다.

추후 blue-emitter 개발방향에 대해서는 EL peak을 최대로 향상하고 60nm의 FWHM과 460nm의 파장대를 가지는 deep-blue TADF emitter를 목표로 하여 개발할 예정이라며 발표를 마쳤다.

CYNORA는 TADF 재료와 관련하여 수 년간 활발한 연구를 진행해온 대표적인 선도 기업으로, OLED display의 성능개선의 가장 큰 이슈인 blue emitter material 개발에 중점을 두고 있다.

CYNORA to present its newest OLED device results for TADF blue with EQE up to 24% at the Korea OLED Conference

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During the coming OLED Korea Conference, hosted by UBI Research, CYNORA is going to present the newest status of its blue TADF (thermally activated delayed fluorescence) emitters. CYNORA is one of the most active companies in this field with several years of experience in TADF. The company’s focus is on the high-efficiency blue emitter materials, which are currently the biggest limitation for further significant improvement of OLED displays. CYNORA’s blue TADF emitters will enable device makers to produce OLED displays with significantly reduced power consumption and higher display resolution.

<Picture : CYNORA>

An update of the status of TADF emitters at CYNORA will be shown by the CMO, Dr. Andreas Haldi during the Session “Better Materials for Better Performance”. Andreas Haldi will present improved OLED devices with a sky-blue material with an EQE of 24% and with 1000 h lifetime (LT80), both measured at display brightness. The performance of these devices is so far the best result combining efficiency and lifetime that has been reported for the TADF technology with blue emission. Andreas Haldi will also disclose in his presentation some more details relating to the planned commercialization of CYNORA’s blue TADF emitters by end of this year.

<Picture : CYNORA>

UBI Research has recently announced that the OLED emitting material market is increasing sharply and is expected to reach about US$ 980 million in 2017. With Apple starting to use OLED displays in the near future, the demand for high-performance OLED panels will increase significantly. Therefore, the panel makers are currently pushing the adaptation of high-efficiency blue pixels in their panels to gain an edge towards the competition.