Technical / Research

INFICON details its Magnesium-Sensitive Crystal for OLED deposition

This is a sponsored post by INFICON

OLED producers have been struggling with the deposition of magnesium materials during the OLED production process. INFICON has developed high-level magnesium-sensitive crystals specifically for OLED deposition, that significantly shorten the initial time delay in magnesium monitoring, while maintaining high stability and reproducibility.

The following application note details INFICON crystals for OLED deposition, the development process, and the experiments the company performed to characterize and evaluate the crystal quality to make sure it offers the highest possible solution for the OLED industry.

Background

Quartz crystal microbalance (QCM) is one of the most important INFICON products for organic light-emitting diode (OLED) and optical device fabrication, as well as for many other applications. The change in the QCM's resonance frequency due to mass loading by thin films allows it to be used as a surrogate for correlating the rate of the film thickness accumulation on a substrate. The design of INFICON High Precision Sensor Crystals was based upon many OLED manufacturers’ requirement of more stable crystals that are less prone to activity dips (instability in the activity signal) in controlling the deposition of OLED materials. The field performances of INFICON High Precision Sensor Crystals have shown to improve rate stability with nearly extinguished activity dips in terms of the number of occurrences as well as the magnitude when they rarely occur. Refer to the “High Precision Sensor Crystal Line Technical Note” found using this link.

Read the full story Posted: Sep 13, 2022

Sewon's OLED phototherapy patch passes FDA registration

A few weeks ago Korea-based Sewon announced that it is entering the OLED-based optical patch business, based on technology developed by Kwangbio and Korea's KAIST institute. The idea is to use OLED panels for phototherapy that can be used to treat pain and encourage skin regeneration.

KAIST-ERC OLED light therapy engineering center image

Sewon E&C now announced that its OLED phototherapy patch, the first such patch in the world, has completed the FDA registration. The company now aims to accelerate the commercialization, and has already secured the site for the production facility. Sewon hopes to bring the patch to the market by the end of 2022 or early in 2023.

Read the full story Posted: Sep 12, 2022

Computing material properties for OLED device simulations

This is a sponsored post by Nanomatch

To enable efficient design and improvement of OLED materials and device, the Nanomatch
software computes material properties and parameters such as HOMO, LUMO, excitation spectra,
transition moments, etc. from first principles.

Recent improvements in the ab-initio computation of material parameters enable the accurate
computation of IV and EQE of state-of-the-art OLED devices. This was demonstrated for a recently
reported exceptionally stable blue OLED.

Read the full story Posted: Aug 22, 2022

Sewon to commercialize OLED-based phototherapy solutions to treat pain and various skin conditions

Korea-based Sewon NC announced that it is entering the OLED-based optical patch business, based on technology developed by Kwangbio and Korea's KAIST institute.

KAIST-ERC OLED light therapy engineering center image

We do not have many details, but apparently Professor Kyung-cheol Choi from KAIST developed OLED optical patches for phototherapy that can be used to treat pain and encourage skin regeneration. Following an investment agreement, Sewon NC has secured the rights to produce and sell the OLED patches.

Read the full story Posted: Aug 22, 2022

Researchers developed promising N-doped PAH OLED emitters

Researchers from the Polish Academy of Sciences (PAS) and from the Silesian University of Technology have developed new OLED emitter materials based on aromatic electron-donating and -accepting moieties bridged by an antiaromatic seven-membered ring.

The researchers say that the new design of its N-doped PAHs is very flexible, and their properties are very responsive to the choice of the electron-accepting group. The researchers can thus can tune the emission mechanism between TADF emission and room temperature phosphorescence (RTP) emission, which gives high degree of control over the emission profile.

Read the full story Posted: Jun 23, 2022

Samsung's supercomputer OLED material software platform is up and running

In February 2022 we reported that Samsung Display launched a new platform for OLED material simulation, called Sync-OLED, which is used to evaluation OLED material characteristics before they are synthesized, to help speed up R&D projects.

Samsung Display Sync-OLED system photo

According to a new report from Korea, the new software platform have started operating, and is already in use by three companies. Sync-OLED, developed by Samsung and the KISTI institute, runs on a supercomputer called Nurion located at the KISTI Super Computing Application Centre. Samsung offers access to the software to small and medium OLED material research companies. Samsung's partners have access to the software at no cost.

Read the full story Posted: Jun 13, 2022

Idemitsu Kosan developed the world's most efficient fluorescent blue OLED emitter system

Idemitsu Kosan announced that it has developed the world's most efficient blue fluorescence OLED emitter system. Idemitsu's new system achieves an EQE of 14% (at current density of 10 mA/cm²), a lifetime of over 400 hours (LT95 @ 50 mA/cm²) and a color point of (0.14,0.08).

The new material system uses a tandem structure of two blue OLED emitter layers. Idemitsu says that by separating the region that causes charge recombination and utilizing TTF (Triplet-Triplet Fusion) it managed to achieve the high light output.

Read the full story Posted: May 17, 2022

LG Display demonstrates a prototype WOLED display with a microlens MLA array

As we reported last week, LG Display is developing OLED TV panels that utilize a microlens array to increase the light output. LGD unveiled its first prototype display at SID Displayweek 2022.

LGD is showing a 77" 8K panel that features what the company refers to as Meta-lit Lens Array, or MLA technology. The MLA layer increases light output by more than 20%, and the panel achieves a brightness of 2,000 nits. LGD says that the viewing angles is also increased using the MLA technology.

Read the full story Posted: May 12, 2022

KIST researchers develop a non-destructive method to inspect OLED emitters using terahertz waves

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

OLED inspection with teraherz waves (KIST)

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.

Read the full story Posted: May 12, 2022

OTI Lumionics and Dai Nippon Printing collaborate on better EVM masks for OTI's material deposition

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 materals and transparent display

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.

Read the full story Posted: May 09, 2022