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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.

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 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.