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

The Fraunhofer FEP showcases its latest OLED microdisplays at Display Week 2023

During Display Week 2023, the institute demonstrated its latest displays, including the world's highest-density OLED microdisplays, reaching a PPI of 10,000 with a pixel size of only 2.5 um.

Fraunhofer's 10,000 PPI display was e a 0.18" 1440x1080 (monochrome) panel, produced on 300 mm wafers, using a 28 nm backplane process. The Fraunhofer also showcases ultra low-power microdisplays, and more technologies.

Read the full story Posted: Jun 03,2023

Excyton to show its novel TurboLED OLED architecture at DisplayWeek 2023 I-Zone

The following is a sponsored post by Excyton

UK-based Excyton is happy to announce that it will showcase its novel TurboLED OLED architecture and technology at the 2023 Displayweek event (May 23-25, Los Angeles, California). Excyton has been accepted to participate at the 2023 I-Zone event.

TurboLED is a game-changing technology that offers a dramatic boost to the performance of displays. In a TurboLED OLED display, each pixel comprises deeper and lighter color red, green and blue emitters to maximize performance - in fact Excyton has shown that the TurboLED architecture leads to a 50% reduction in power consumption, a 3X improvement in emitter lifetime and an increased color gamut. TurboLED displays are especially suited for demanding applications, such as IT displays, automotive displays, gaming monitors, AR/VR headsets, smartphones and wearables.

Read the full story Posted: May 20,2023

The Fraunhofer FEP developed the world's highest density OLED microdisplay, reaching 10,000 PPI

The Fraunhofer FEP research institute announced that it has developed the world's highest-density OLED microdisplays, reaching a PPI of 10,000 with a pixel size of only 2.5 um. The Fraunhofer will demonstrate a 0.18" 1440x1080 (monochrome) OLED microdisplay next week at Display Week 2023.

The new microdisplays were produced on 300 mm wafers, using a 28 nm backplane process. The Fraunhofer explains that most OLED microdisplays to date are produced on 200 mm wafers, using CMOS processes ranging from 90-250 nm. The institutes new technologies enables the the performance increase in OLED display processing. 

Read the full story Posted: May 16,2023

Visionox new ViP OLED technology uses photolithography-based patterning to increase display performance

Visionox is introducing a new OLED production technology, called Visionox Intelligent Pixelization (or ViP for short) that enables higher-density display production, at over 1,700 PPI.

The idea behind ViP is to replace the fine metal mask (FMM) method with photolithography-based pixel patterning. The process offers several advantages, mainly the increase of aperture ratio to almost 70% (Visionox says the currently reach 69%). FMM methods usually achieve up to 30%, which means that brightness, efficiency and lifetime can all be increased.

Read the full story Posted: May 10,2023