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Universal Display succeeds in developing “ink” for OLED printing

Large-size panels using organic light-emitting diode (OLED) technology attract manufacturers for their cost-effectiveness. However, an obstacle to the deployment of serial production of such products is the lack of materials for the manufacture of OLEDs with the required properties.

As stated in the official press release, Universal Display, working in collaboration with Seiko Epson, has been able to achieve significant success in the creation of such materials. In particular, the company’s specialists have created phosphorescent materials under the general name P2OLED, which can be used to “print” PHOLED displays. The use of liquid semiconductor materials suitable for deposition on a substrate using an inkjet process is considered the most promising way to develop technology for the manufacture of large-size panels.

The development, which is the result of three years of efforts by specialists from the two companies, was submitted to the International Display Workshop (IDW) Conference, which is hosted in Japan by the Society for Information Display.

The developers are said to have been successful in creating materials in all three primary colors – red, green, and blue. New materials have high luminous intensity and extended service life. In particular, materials of red and green luminescence can withstand at least 50,000 hours of operation, losing during this time up to 50% of the original brightness (for red it is 500 cd / sq.m, green – 1000 cd / sq.m). Blue material is the most difficult for developers so far. Its guaranteed service life is at least 3000 hours (at a brightness of 500 cd / sq.m).

An important advantage of PHOLED displays over traditional OLEDs is their higher energy efficiency. Energy savings can be up to fourfold, says Universal Display.

Source: Universal Display

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