Researchers develop 100% IQE radical-based OLED emission

Researchers from the University of Cambridge and Jilin University discovered that radical-based OLEDs feature highly efficient emission - in fact they believe that this discovery could be an elegant solution to the problem of in-efficient OLED emission.

First-generation OLED emitters (fluorescent emitters) have a maximum internal quantum efficiency of 25% - as only a quarter of the electrons are in a singlet-state (that emit light) while 75% of the electrons are in a triplet-state. Current ways to achieve 100% IQE are either based on doping with heavy metals (phosphorescent emission) or either based on delayed fluorescence (TADF).

DSCC: Samsung to begin pilot QD-OLED production in 2019

DSCC estimates that Samsung will begin pilot production of QD-OLEDs in 2019, with a capacity of 5,000 monthly 8.5-Gen substrates. If this is successful, Samsung will double the capacity in 2020 and add a further 30,000 yearly substrates in 2021 and again in 2022. Material revenues for Samsung's QD-OLED TVs will reach $56 million in 2022.

Material revenue forecast for QD-OLED TVs (DSCC, 2016-2022)

DSCC admits, though, that as Samsung faces several technical challenges before it could launch commercial QD-OLED TVs, its forecast could be way off - there's a good chance that SDC will cancel the project, or it could increase capacity at a much faster rate than DSCC estimates and even scale-up production to 10.5-Gen.

An interview with Cynora's CMO Dr. Andreas Haldi - talking about TADF, lifetime, color points and more

German TADF developer Cynora presented its latest blue TADF material in May 2018 - with a CIEy of 0.14, EQE of 20% and a lifetime of 20 hours LT97 at 700 nits. Cynora expects to have blue material in the mass production by 2020.

Dr. Andreas Haldi - Chief Marketing Officer Cynora

Cynora's Chief Marketing Offer, Dr. Andreas Haldi was kind enough to answer a few questions we had regarding TADF emitters, the differences between next-generation emitter technologies, lifetime, color points and more.

How will the phosphorescent emitter market look in 2018, following UDC's basic material patent expiration?

The phosphorescent OLED emitter market is currently dominated by Universal Display who owns the basic patents to phosphorescent OLED emitters. All the major OLED makers (including Samsung and LGD) are using UDC's materials in order to achieve higher display efficiencies, beyond what is available from fluorescent emitters.

Universal Display holds over 4,000 issued and pending patents, but some of its basic phosphorescent patents are set to expire by the end of 2017. Honestly, it is very difficult to know exactly what effect this will have on the market - some analysts believe that it will carry very little effect while others say that this will open the door for other companies to sell competing phosphorescent emitters.

LG aims to adopt a blue TADF emitter in its 2018 OLED TV stack

Korean news site DDaily posted an interesting article that states that LG Display is looking to replace the fluorescent OLED emitter used in its OLED TVs with a blue TADF emitter.

LG OLEDC7 photo

Following the introduction into LG's OLED TV production process, LG hopes to also use TADF materials in its small and medium OLED production. The report is a bit confusing, but it seems that LGD also aims to use its WOLED display in small and medium display formats - even for VR applications.

Idemitsu Kosan and BOE Display sign a strategic alliance to develop OLED materials and displays

Idemitsu Kosan and BOE Display agreed to form a strategic alliance with an aim to develop high-performance OLED materials and displays. Specifically, Idemitsu intends to develop and supply OLED materials in accordance with BOE's needs, as BOE is starting to mass producing OLED displays in several fabs in across China.

Flexible AMOLED prototype (BOE, Chengdu fab)

Idemitsu Kosan is in the process of expanding its OLED material production at its Korean subsidiary Idemitsu Electronic Materials Korea, and the company also recently established a new OLED materials development company in Switzerland. Idemitsu is supplying its OLED materials to both LG Display and Samsung Display and is apparently enjoying an increased demand and is looking to start selling its materials to BOE DIsplay as well. We recently posted aninterview with Idemitsu's electronics materials chief.

pn-OLED structure may enable efficient and cost-effective fluorescent OLED devices

Researchers from South China University of Technology developed a new OLED structure that promises to enable low-cost efficient fluorescent OLED devices. The so-called pn-OLED structure is inspired by p-n junction theory and inorganic LED design.

pn-OLED structure image

The pn-OLED uses a highly-efficient emission-layer-free OLED, in which the p-type and n-type organic semiconductors are sandwiched vertically between an ITO anode and a lithium fluoride/aluminum cathode. The luminescent center of the pn-OLED is located in the p–n junction region. The light-emission behavior of this device is a result of the synergetic energy release from both the p-type and n-type materials. This is in contrast to conventional OLEDs, where the light generation occurs from single-molecule emitters.

An interview with Idemitsu Kosan's electronic material's chief

Hajime Nakamoto (Idemitsu Kosan)Idemitsu Kosan is a large multinational Chemical company based in Japan that is supplying OLED materials for OLED producers. Idemitsu has OLED business units in Japan, Taiwan, Korea and China and is collaborating with UDC, LGD, AU Optronics, Doosan and others.

Hajime Nakamoto, the head of the Electronic Materials Department at Idemitsu was kind enough to answer a few questions we had. Mr. Nakamoto joined Idemitsu in 1984 and has been involved with OLEDs since 2007.

Q: Hajime, Thank you for your time. Idemitsu has been one of the leaders in OLED materials for a very long time. Can you tell us what kind of materials you currently offer for OLED panel makers?

Idemitsu offers almost all kinds of OLED materials to OLED panel makers. Idemitsu is particularly well-known for its fluorescent blue host and dopant materials and transport materials, which offer advantages to OLED panel makers.

The EU launches a new project to commercialize TADF OLED emitters

Phebe project logoThe European Commission, under its Horizon 2020 programme, launched a new project called Phebe that aims to develop and commercialize TADF OLED emitters. This three-year project's consortium includes Novaled, Astron-FIAMM, TU Dresden, Kaunas University of Technology, Durham University and other companies and universities.

TU Dresden is focusing on material design using theoretical quantum chemical approaches, and KTU is elaborating synthetic schemes for exciplex emitters and intramolecular charge transfer materials and synthesizing the most promising compounds. Durham will perform photophysical characterisation of the new materials from Kaunus and will also be in charge of elucidating the mechanisms of TADF to feed into the theoretical work of TU Dresden. Novaled will provide best-fit transport and doping material sets, technology and expert know-how on stack architecture.

Ason devloped a 50,000 cd/m2 OLED panel, plans to start mass production in 2016

Japan-based Ason Technology unveiled their first OLED lighting panel in 2013, and last year we featured an article discussing the company's technology and business. In a recent interview to Sangyo-Times, the company's CEO reveals some interesting updates.

Ason spent almost eight years to develop a new multi-stack structure that can be used to create OLED with many layers, which results in long-lasting high-brightness panels. The company now reports that it developed an OLED with twelve (!) emitting layers, which enables it to reach a high brightness of 50,000 cd/m2.

Kyulux - Hyperfluoresence OLED emittersKyulux - Hyperfluoresence OLED emitters