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Printed Electronics World
Posted on April 27, 2011 by  & 

OLED Ink boost lifetime and lower operating voltage at UDC

Universal Display Corporation's phosphorescent OLED technology has been integrated with Plextronics' OC NQ ink to lower operating voltage and longer lifetime in test devices.
This is the second time in less than five months that UDC has announced breakthrough performance improvements in its P2OLED™ program that include the use of Plexcore OC NQ ink.
Plextronics OC NQ was made available for limited sampling to key customers and partners last October. The non-aqueous-based Hole Injection Layer (HIL) ink complements the company's existing aqueous-based HIL, and is geared specifically for solution processible phosphorescent OLED emitters.
Dr. Kwang Ohk Cheon, Senior Research Scientist at Universal Display, reported the following results at IDMC. All of these results include Plexcore OC NQ as the HIL:
  • The green P2OLED system, which offers a luminous efficiency of 68 candelas per Ampere (cd/A), has now achieved 175,000 hours of operating lifetime. This represents approximately a 1.3 times improvement in lifetime over results reported last fall.
  • The red P2OLED system, with a luminous efficiency of 18 cd/A, now offers an operating lifetime of 125,000 hours for a two-times improvement in lifetime.
  • The light blue P2OLED system now offers a luminous efficiency of 29 cd/A and 8,000 hours of operating lifetime for a 1.6 times improvement in luminous efficiency and lifetime.
Plextronics have an ongoing programme to develop ink-jet printable solutions for long lifetime and low voltage in printed OLED devices.
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