LG Display aims to expand the use of deuterated OLED compounds

In 2021, LG Display started to adopt deuterated OLED compounds in its WOLED panels, to improve the lifetime, efficiency and brightness. Today, all of LG's WOLED TV panels use deuterated blue OLED emitters, in which hydrogen is replaced by its more stable isotope, deuterium. The higher stability enables longer lifetime, which in turn enables higher brightness and efficiency.

LG Display OLED EX Technology photo

It is now reported in Korea that LG Display now aims to expand the adoption of deuterated OLED compounds to its red and green and yellow emitters, and also other layers in the OLED stack. If this report is true, it means that LGD will also use the technology in its mobile (p-OLED) panels, not just its OLED TV ones. 

Read the full story Posted: Dec 26,2023

Visionox produced its first ViP AMOLED display, is progressing towards mass production

Visionox announced that it has produced the first mass-production sample ViP AMOLED display. The company aims to start mass producing small and medium-sized ViP AMOLED soon, and later apply the technology for large-area panels as well.

The company did not detail when it expects to start actual mass production. It did update that it has already applied for over 500 patents regarding to ViP technology, over 13 different technical fields. The company also says it is in talks with several key customers to define its production process and final display capabilities.

Read the full story Posted: Dec 19,2023

Merck in dialogue: Next generation OLED materials

Merck KGaA is a pioneer in high performance OLED material development, supplying a range of materials for AMOLED makers since the industry’s inception.

To learn more about Merck’s materials and views on the OLED industry, we conducted an interview with Dr. Georg Bernatz, Merck Electronics’ Global Head of OLED Technical Marketing. Georg Bernatz has received a PhD in Physics from the Philipps-Universität in Marburg, Germany in 2000. In 2004, Georg joined Merck, where, over the years, he worked in various functions and on various topics in the field of Liquid Crystals for displays. In 2018, Georg changed to OLED, leading OLED Physics Product Research, and in 2020 he became responsible for all Physics & Application Labs in Darmstadt for Display materials. Since October 2023, Georg is heading Merck’s Global Technical Marketing for OLED materials.

Hello Dr. Bernatz. Can you bring us up to date quickly on Merck's current OLED material products? What do you offer to OLED display makers?

Merck KGaA, Darmstadt, Germany is very active in the design, development and production of a broad variety of high performing OLED materials, with a strong focus on hole and electron transport materials (HTM, ETM), host materials for phosphorescent emitters as well as activities in the field of high efficiency blue.

Read the full story Posted: Dec 12,2023

UBI: Samsung to delay the introduction its first blue phosphorescent AMOLEDs to the second half of 2025

Universal Display is progressing with its blue PHOLED material, and earlier this month the company said it is on track to introduce the new material commercially in 2024. During a company seminar, UBI's Daejeong Yoon updated that according to their latest information, Samsung Display has decided to adopt a blue phosphorescence material in the second half of 2025 - a year later than expected.

Samsung is calling the new material stack B1, and it says that the new stack will increase the efficiency of its OLED device by more than 65% (which seems to be rather too much, maybe it means 65% of the power consumption of the current stack). UBI says that the blue OLED still suffers from low lifetime - the lifetime of the blue PHOLED stack is only 55% of the lifetime of its current fluorescence-blue stack, but regardless of that the company will introduce it commercially due to the power consumption efficiency.

Read the full story Posted: Nov 15,2023

Researchers develop an organic laser using an electrically-pumped OLED device

Dr. Kou Yoshida and Dr. Junyi Gong, from the University of St Andrews, working with Prof. Ifor Samuel and Prof. Graham Turnbull, have developed an integrated organic laser device, based on an electrically-pumped laser.

In this work, the researchers developed and electrically driven organic electronic laser, with a narrow emission spectrum and the formation of a laser beam above the threshold. The researchers have shown that indirect electrical pumping by an OLED is a very effective way of realizing an electrically driven organic semiconductor laser.

Read the full story Posted: Sep 29,2023

Researchers develop promising near-UV CMAc OLED emitters

Researchers from the University of Manchester, led by Prof. Alexander Romanov, developed a promising new Carbene-Gold-Arylacetylide (CMAc) OLED near UV emitter type. The researchers also detail a strategy to develop longer device lifetimes for such emitters.

The new emitter exhibits an efficiency of 1% EQE, and a lifetime of 20 minutes at a practical brightness of 10 nits (LT50). This is low compared to commercial OLEDs - but it is actually quite outstanding for such an emitter, and the researchers say that this is among the longest lifetimes for a near UV-OLED at a practical brightness ever reported. In addition, organic fluorescent and TADF emitters rarely exceed 1% EQE at practical brightness.

Read the full story Posted: Sep 06,2023

Researchers design the world's highest-efficiency narrow-emission deep-blue TADF OLED emitter

Researchers from Korea's KAIST institute, in collaboration with Gyeongsang National University developed a new TADF OLED deep-blue emitter molecule that achieves an EQE of 33%. Combined with a fluorescent emitter to create a hyperfluorescence system, the researchers achieved an EQE of 35.4%, with mitigated efficiency roll-off. The researchers say that this is the world's highest-efficiency narrow-band deep-blue TADF OLED emitter.

To develop the new emitter the researchers introduced sterically hindered peripheral phenyl groups to boron-based TADF emitter. The resulting material, o-Tol-ν-DABNA-Me, offers a pure narrowband emission that is far less sensitive to concentration compared to standard TADF emitters.

Read the full story Posted: Jul 03,2023

Researchers develop new deep-blue exciplex OLED emitters, break the world EQE record

Researchers from Germany's Karlsruhe Institute of Technology (KIT) and Shanghai University developed a new high-efficiency exciplex deep-blue OLED emitter material. The researchers say that this new materials achieves a external quantum efficiency (EQE) of 20.35% - a new world record for deep-blue emission.

The researchers explain that their exciplex strategy is based around a new molecule type with carbazole and triazine fragments linked by a silicon atom. The molecules assemble into nanoparticles which emit light in a different mechanism compared to standard single-molecule emitters. The energy levels of the electron-donating carbazole fragments and electron-accepting triazine fragments can be adjusted independently of each other to enable highly efficiency and stable red, green and blue OLED emitters.

Read the full story Posted: Jun 21,2023

What can deuterium do for OLED displays?

The following is a sponsored post by Cambridge Isotope Laboratories

OLED has become the display technology of choice for many commercial products such as smartphones, laptops, tablets, TVs, automotive dashboards and wearables. OLED has advantages with improved image quality (better contrast, higher brightness, fuller viewing angle, wider color range, and faster refresh rates), lower power consumption, and simpler designs (ultra-thin, flexible, foldable, and transparent displays).

Cambridge Isotope Laboratories plant in Xenia, OH, USA

OLED, however, faces several technical challenges. While OLED TVs yield better picture quality than common LCDs, they are usually less bright. Research using a compound that has at least one hydrogen replaced with its heavier isotope, deuterium, is showing promise toward achieving greater brightness. Since the bonds between carbon and deuterium are stronger than those between carbon and hydrogen, materials made with deuterated compounds tend to have a longer lifetime, which allows OLED displays to run brighter but still last as long.

Read the full story Posted: Jun 19,2023

Excyton wins an I-Zone innovation award at SID Display Week 2023, concludes a successful event

UK-based Excyton has won an I-Zone innovation award at SID Display Week 2023, a great testimonial to the interest in the display industry for its novel OLED and microLED pixel architectures.

Excyton concludes a very successful display week. The company's CEO, Peter Levermore, gave a presentation explaining the company's TurboLED display architecture, detailing how the technology works and the simulations the company has performed. The company also had a booth at Display Week's I-ZONE section, where it demonstrated red, green and blue TurboLED devices powered by both deep-color and light-color emitters. In fact the company says that its demonstration attracted a lot of interest from the industry, and it had many constructive meetings during the week that it is following up on to start commercial collaborations in the near future.

Read the full story Posted: Jun 15,2023