Technical / Research - Page 10

Researchers from the Korea Institute of Science and Technology (KIST) suggest a new method to inspect OLED emitter materials, using terahertz wave spectroscopy.

The researchers say that this method can be used to analyze the transmission characteristics of the OLEDs, without any damage to the materials. This is unlike current fluorescence test methods that harm the OLEDs because of the ultraviolet rays which changes the characteristics.

Canada-based OTI Lumionics started shipping its 2nd-gen ConducTorr Cathode Patterning Materials (CPM) by the end of 2020 to customers, which are used to create OLED displays with under-the-display camera and face unlock technologies.

OTI Lumionics now announced that it signed an agreement with EVM OLED mask maker Dai Nippon Printing. Dai Nippon will optimize its EVM masks for the deposition of OTI's CPM materials.

Reports from Korea suggest that LG Display is looking into adopting a microLens array in its large OLED TV panel architecture. The microlens layer could boost brightness by up to 20%, which will also increase efficiency (if brightness is kept as before).

MicroLens array structure, University of Michigan

According to the report, the project is at an advanced stage, and panels with the microLens array could be introduced by the end of this year. LGD will apply the technology to its OLED.EX panels, so brightness could reach up to 1,200 nits. LGD considers this technology as it faces competition in large-area OLED production, from Samsung's QD-OLED panels, for the first time.

This is a sponsored article by Nanomatch

Recent applications of the Nanomatch Toolkit to improve OLEDs:

• Charge carrier mobility
• Charge screening in OLED materials
• Doping
• Excited states in molecular thin films

Attend our talk at SID Display Week (Session 28 on May 11 2022, 10:40 AM) for further information.

Read more:

Researchers from the Korea Advanced Institute of Science and Technology (KAIST) developed a white OLED device that can be deposited on thin fabrics. The researchers say that this is the world's first such device, as previous white OLEDs, made using a tandem structure, could not be bent on fibers.

For the new device, the researchers developed a single white light-emitting layer. The brightness of the device is up to 700 nits, with an efficiency of 10 candelas per ampere.

Simbeyond provides unprecedented software tools for the development of high-tech (nanotechnology-based) devices that replace a large part of the costly and time-consuming experimental R&D efforts with computer simulations. In other words, creating digital twins of physical prototypes.

The unique approach that Simbeyond provides allows customers to analyze, predict and improve device performance which benefits both device manufacturers looking to optimize OLED stacks and material manufacturers looking to screen new materials. The intuitive web interface of the Bumblebee software allows you to quickly prepare and specify your virtual experiment and start dozens of device or material simulations from your laptop using a cloud-based environment.

In 2016, Researchers from Japan's Semiconductor Energy Laboratory (SEL) announced a new OLED device architecture, called ExTET ('exciplex triplet energy transfer'), that can increase the performance of OLED devices. The technology was applied for a patent in 2011.

The ExTET technology, which is a modification of the host material and the EML layer in phosphorescent OLED devices, have since been introduced to commercial AMOLED panels, increasing the efficiency and lifetime of the materials, while also lowering the drive voltage.

Notion Systems, a leading solution provider for industrial inkjet systems, announced that it had successfully installed an n.jet display system at Taiwan's Industrial Technology Research Institute (ITRI). The n.jet display system was developed in collaboration with MBRAUN/Germany and includes a fully integrated inert glove box solution that combines compact design with minimized nitrogen consumption.

ITRI is now using the new n.jet display system to research and develop novel OLED and QLED technologies. ITRI has developed many OLED technologies over the years, and it is now looking to replace vapor deposition and vacuum coating with inkjet printing which could reduce the number of steps, increase material utilization and increase display quality.

Next week, Toray Research Center (TRC) will host an online webinar focused on OLED technologies. TRC, who supplies technical analysis and support for R&D and manufacturing, invites you to attend the online lectures at no cost, to learn more about OLED technologies and analysis of OLED devices.

One of the topics covered in these online webinars will be the degradation analysis of OLED devices. The researchers at TRC can use nine different techniques to analyze the OLED stack, looking for organic impurities, degradation products, outgas and luminescence properties of an OLED device. The researchers can also look at the sealing property of the encapsulation layer and analyze the OLED device's cathode.

Samsung Display launched a new platform for OLED material simulation, to support its growing partner ecosystem for the development of OLED materials. The platform is open for Samsung's partners at no cost, and other companies can obtain a license.

The platform, called Sync-OLED, is used to evaluation OLED material characteristics before they are synthesized, to help speed up R&D projects that aim to find improved materials. The platform was developed in collaboration with the Korea Institute of Science and Technology Information (KISTI) Super Computing Application Center.