UDC Announces Advances in Printable, PHOLED Material Systems for Ink-Jet Printing with Seiko Epson

Universal Display Corporation will today report advances in the development of P2OLED™, printable, phosphorescent OLED, material systems for use with ink-jet printing processes at the Society for Information Display’s (SID) 2008.

Presenting on a joint paper with Seiko Epson Corporation, Dr. Sean Xia, Senior Research Scientist at Universal Display, will describe advances in red, green and blue P2OLED material systems. Dr. Xia will also discuss the companies’ demonstration of ink-jet printed P2OLED technology and their continuing work to achieve commercial entry performance goals. Ink-jet printing has the potential to be a cost-effective approach for the production of large-area OLED displays.

The collaborative paper is the result of a joint development program during which the two companies successfully demonstrated the compatibility of Universal Display’s P2OLED technology and materials with Epson’s proprietary ink-jet printing process technology.

Through continued development using spin-coating techniques, the team has doubled the projected operating lifetime of its red P2OLED system since late last year to 100,000 hours (from an initial luminance of 500 cd/m2) with CIE coordinates of (0.67, 0.33) and a luminous efficiency of 12 candelas per Ampere (cd/A). The team also improved the projected lifetime of its green P2OLED system with CIE(0.33, 0.62) and a luminous efficiency of 34 cd/A to 63,000 hours (from an initial luminance of 1,000 cd/m2).

The team also made progress in the development of two blue P2OLED systems. A light blue P2OLED system with CIE(0.18, 0.39) and a luminous efficiency of 19 cd/A now has a projected lifetime of 6,000 hours from an initial luminance of 500 cd/m2, also twice that reported late last year. A new blue P2OLED system has more saturated color, with CIE(0.15, 0.22), a luminous efficiency of 6 cd/A and a projected lifetime of 1,000 hours (from an initial luminance of 500 cd/m2).

Universal Display’s PHOLED technology and materials, which offer up to four times higher energy efficiency than traditional OLED systems, are today being incorporated in products manufactured using conventional vacuum thermal evaporation (VTE) equipment. Universal Display’s P2OLED materials and technology are based on this same PHOLED technology, but are designed for use with solution-based manufacturing processes such as ink-jet printing.

Posted: May 21,2008 by Ron Mertens