TADF, or Thermally Activated Delayed Fluorescence, is a relatively new class of OLED emitter materials that promise efficient and long-lifetime performance without any heavy metals. TADF research started in earnest in 2012, and TADF emitters are expected to become commercial by 2018.

Blue TADF emitter molecules

There are currently three main challenges with OLED emitters that TADF aims to solve - an efficient and long-lasting blue color emitter, low cost alternatives current red and green emitters and the development of soluble OLEDs that can be deposited using low cost ink-jet printing or other "wet" methods.

TADF is being developed by three companies. Japan-based Kyulux was established to commercialize Prof. Adachi's HyperFluoresence TADF technology. Germany-based Cynora is focusing on a blue TADF emitter. Both companies aim to release their first commercial materials in late 2017 or early 2018. Idemitsu Kosan also considers TADF as one of the key OLED technologies and intends to focus on TADF in the future (although Idemitsu's actual TADF plans are not clear yet).

The EU launched two TADF related collaborative research projects to focus on TADF emitters, Project HyperOLED and the 2015 project Phebe.

Latest TADF OLED news

Nanoco and Kyulux to co-develop hybrid OLED / QLED display technology

May 22, 2017

Hyperfluoresence and TADF OLED emitter developer Kyulux and quantum-dot developer Nanoco announced that the two companies will co-develop a future-generation hybrid OLED / QLED display technology that combines Kyulux's hyperflourescent emitters and Nanoco's heavy metal free quantum dots (CDQDs).

Nanoco CFQD materials photo

Kyulux and Nanoco say that future displays based on this technology will have superior qualities compared to existing displays - high degree of brightness, energy efficiency, color purity and low cost.

Cynora announces its latest blue TADF OLED emitter performance

May 22, 2017

Germany-based blue-TADF OLED emitter developer Cynora announced that it achieved a new performance record with its latest blue emitter material - which the company believes is the best overall performance of a high-efficiency blue emitter ever.

Cynora's new blue achieves a 15% EQE at 1000 cd/m² with an emission peak at < 470 nm and a LT97 of > 90 hours (at 700 cd/m²) on a device level. Cynora says that it is very confident that it can commercialize its first highly efficient blue emitter by the end of this year, as planned.

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Meet Kyulux at SID 2017

May 19, 2017

The following is a sponsored message by Kyulux

The SID Display Week, which will take place next week in Los Angeles, California, is one of the most important events in the display industry. This year's Display Week will provide an excellent chance to be updated on the latest advances by Kyulux, the Japan-based OLED TADF and Hyperfluoresence material developer.

Kyulux 2017 TADF demonstration panel

Hyperfluorescence combines TADF and fluorescence to provide the ultimate OLED emission technology, and unlike phosphorescence, it enables full RGB color, 100% IQE and pure narrow spectrum color. Hyperfluorescence is set to replace existing emitter technologies by early 2020, and Kyulux aims to release its first commercial materials by 2018.

Join the 2nd International TADF workshop in Kyushu, Japan

May 04, 2017

This is a sponsored post by Kyulux

The International TADF Workshop 2017 will take place in July 20-21, 2017, at Kyushu University, Fukuoka, Japan. The workshop, organized by Kyushu University and supported by Kyulux, aims to share the recent advances and future direction of TADF science and technologies.

This event will bring speakers from LG Display, Dow Chemical and dozens other from Universities all over the world. This is a free workshop (although there is a fee to attend the banquet). Kyushu is the "birthplace" of TADF technology and this should be an interesting and exciting event that will cover a wide gamut of cutting-edge research in TADF chemistry, devices, and applications.

The EU launches a €4 million project to develop efficient hyperfluorescence TADF OLED emitters

Apr 21, 2017

The EU launched a new project called HyperOLED with an aim to develop materials and matching device architectures for high-performance, hyperfluorescence TADF OLED emitters. HyperOLED is coordinated by Merck, and the project partners include MicroOLED and the Fraunhofer IOF institute. This three years project received a €4 million grant from the EU.

HyperOLED logo

These OLED emitters will be realized by combining TADF molecular hosts with novel shielded fluorescence emitters, targeting saturated blue emission of very high efficiency at high brightness. The project will also achieve efficiency gains through molecular alignment to enhance light outcoupling.

Recent advances in TADF emitters reported towards DisplayWeek 2017

Apr 19, 2017

TADF are getting a lot of attention now, as a promising new emitter type that could finally enable efficient blue emission, and also efficient alternative to red and green phosphorescent emitters.

Blue TADF emitter molecules

Several new TADF research papers have been announced by SID and will be presented at DisplayWeek 2017. Below you will find a list of these recent achievements, at no particular order.

Cynora's CMO: we're on track to commercialize blue TADF emitters by the end of 2017

Apr 10, 2017

Dr. Andreas Haldi was appointed as CYNORA's Chief Marketing Office in 2016. CYNORA develops efficient blue TADF OLED emitters, and Dr. Haldi was kind enough to participate in this interview and help us understand CYNORA's business and technology.

Cynora Blue TADF OLED material photo

Q: Thank you Andreas for helping us understand CYNORA's business and technology better. CYNORA has set up on a focused mission to develop a commercial blue TADF emitter. What will you consider to be a market-ready material, in terms of lifetime, efficiency and color point?

For the last 5 years, CYNORA has worked on developing thermally activated delayed fluorescent (TADF) OLED emitters. End of 2015 we started to focus on efficient blue materials, which are still a key issue for OLED displays. Compared to the red and green pixels, the blue pixel is much less efficient. An increased efficiency of the blue pixel would therefore significantly reduce the power consumption of the display.

The International TADF Symposium offers a discount for OLED-Info readers

Apr 05, 2017

Germany-based TADF developer CYNORA, organizers of the First edition of the International TADF Symposium, was kind enough to offer a special 15% registration discount to OLED-Info readers . Follow this link to register with the discount.

International TADF Symposium 2017 (save the date banner)

The TADF Symposium aims to provide a professional forum for industry and academia experts, with a focus on TADF OLED materials R&D. Several lectures will discuss issues ranging from modeling through synthesis to analytics and device fabrication. The event will feature speakers from LG Display, Samsung Display, Sungkyunkwan University, TU Dresden, Durham University and more - and will take place on September 7, 2017 in Frankfurt, Germany.

Researchers develop polymer-TADF emitters using induced conjugation

Apr 02, 2017

Researchers from the Technical University in Dresden have developed a method to produce polymer TADF emitting molecules. Up until now most TADF materials are based on small molecules or chromophores linked to a polymer network.

Polymer-TADF synthesis final step

This research focused on actual polymer TADF, and using a controlled extension of the conjugation of the monomers HOMO wavefunction, the researchers were able to to increase thephotoluminescence quantum yield from about 3% to about 71%. The reseachers say that this is an encouraging first step towards polymer TADF emitters.

Save the Date: International TADF Symposium

Mar 07, 2017

The first edition of the International TADF Symposium, hosted by CYNORA, is intended to provide a professional forum for industry and academia experts. During the symposium all aspects related to research and development of TADF OLED materials, from modeling through synthesis to analytics and device fabrication, will be covered and discussed in several lectures. The symposium, will take place in Frankfurt in the Hilton City Center Hotel, September 7, 2017.

International TADF Symposium 2017 (save the date banner)

Don`t miss this opportunity to meet top experts providing insights into the Next-Generation OLEDs! For more information visit www.tadf-symposium.com.