On SEL's ExTET OLED device architecture

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.

Conventional Vs. EXTeT OLED mechanisms (SEL)

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 installs an inkjet printing system at ITRI for OLED and QLED R&D

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.

Notion Systems n.jet display system photo

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.

Toray Research Center to explain its OLED device degradation analysis in an online seminar

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.

Toray Research Center TRC banner

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.

SDC launches a new platform for OLED material simulation to support its partners R&D projects

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.

Samsung Display Sync-OLED system photo

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.

TU/e leads a new research project to develop a strategy to suppress OLED exciton quenching

Eindhoven's Technical University (TU/e) announced a new project called SEQUOIA that aims to develop a strategy for the suppression of exciton quenching in OLED devices.

Exciton quenching, caused due to unwanted interactions among excitons and between excitons and charges, causes the efficiency of OLEDs to drop as brightness increases. The researchers hope to develop new materials and new OLED design to suppress (or hopefully eliminate entirely) this problem.

Toray Research Center invites you to attend its online OLED seminars

At the end of this month 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.

Toray Research Center TRC banner

The webinars will include recorded presentations, which will be available online from February 22 to March 08. You can register for the webinars here.

Researchers use a 3D OLED pixel configuration to increase efficiency by up to 30%

Researchers from National Taiwan University, led by Prof. Chung-Chih Wu, have developed a 3D pixel configuration for OLED devices, which can improve the light extraction. The new design can improve the external quantum efficiency of a top-emitting OLED device by up to 30%.

Reflective 3D OLED pixel configuration (NTU)

The new design uses a 3D reflective pixel structure filled with a patterned high-index material. The researchers created several pixels with difference sizes, and found that the smaller the pixel, the higher the efficiency boost.

ETRI and KAIST researchers developed a new metal oxide charge transfer complex that can enhance OLED device efficiency

Researchers from Korea's KAIST and ETRI institute developed a new metal oxide charge transfer complex that, when dispersed in the OLED stack, can improve the OLED efficiency.

NiO and MoO3 complex (KAUST, ETRI)

The researchers have applied this material to a green and blue OLED device. The current efficiency of the green OLED was enhanced by 189%, while the external quantum efficiency of the blue OLED was improved by 17%.

Researchers develop the lowest operation voltage OLED ever at 1.5V for 100 nits

Researchers from japan's National Institute for Molecular Science and the University of Toyama have developed a new OLED structure that can operate at low voltages - the entire OLED runs at 1.5 Volt (compared to 4.5V commonly used in current OLED devices). The researchers say that this is the lowest operation voltage reported for an OLED devices with a luminance of 100 cd/m2. In fact the researchers have demonstrated the OLED at 177 cd/m2.

1.5V OLED design structure and chemical structure (NISM)

The researchers say that the OLED has a smaller turn-on voltage at 0.97 V than the optical energy of emitted photons at 2.04 eV (608 nm), because the OLED is based on upconversion (UC) transition associated with triplet–triplet annihilation that doubles the energy of excited states.

Researchers manage to fabricate a flexible OLED device using only a 3D printer

Researchers from the University of Minnesota Twin Cities managed to deposit flexible OLED devices using 3D printing. The whole OLED stack (including the electrodes, interconnects, insulation, and encapsulation) was printed using a table-top 3D printer (custom build, and reportedly costing like a Tesla Model S).

The researchers used the new method to create a low-cost flexible OLED display of sort, made from relatively large pixels (see video above). The whole panel is 1.5 x 1.5 inch in size, with 64 pixels. The team is now working to improve the density of the process.

Merck - Advancing Display, Advancing LifeMerck - Advancing Display, Advancing Life