- 17 August 2006 -

Companies team to produce record breaking red phosphorescent OLEDs

At the International Society of Optical Engineering (SPIE) Optics and Photonics 2006 conference in San Diego, CA, Universal Display Corporation and Novaled AG have presented a joint scientific paper. It detailed the achievement of a saturated red PHOLED phosphorescent OLED device with a luminous efficacy of 15 candelas per ampere (cd/A) and an operating voltage of less than 4V for a record power efficiency of 12-lm/W all at 1,000 candelas per sq m brightness.

The milestone was achieved through the combination of Universal Display's high-efficiency PHOLED phosphorescent OLED technology and materials with Novaled's low-voltage conductivity doped Novaled PIN-OLEDTM technology and transport materials.

Universal Display's proprietary PHOLED technology offers up to 100% internal quantum efficiency that is as much as four times higher than conventional OLED technology. Over the past few years, the Company has announced a series of record-breaking performance milestones for its red, green and blue PHOLED systems.

Novaled's proprietary doping technology and materials offer very low voltage OLEDs that are up to three times lower than conventional OLED technology. Over the past two years, the company has announced a series of record breaking performances. Novaled has successfully shown that very low device voltages can be combined with long operational lifetimes.

Both parties' technologies combined can deliver excellent power efficiency based on the combination of high internal quantum efficiency and low operating voltage. The results of this collaborative work between Universal Display and Novaled was presented by Dr. Tobias Canzler, of Novaled, in a paper entitled, "Highly power efficient organic light-emitting devices enabled by phosphorescence and p-i-n technologies," at the SPIE Conference.

The red PIN PHOLED device with colour coordinates of CIE (0.65, 0.35) has a peak external quantum efficiency of 16% and a drive voltage of less than 4V at 1,000cd/m2. The device also demonstrates excellent projected operational lifetimes of >150,000 hours at an initial luminance of 500cd/m2, with a luminous efficacy exceeding 15cd/A. The record-setting 12lm/W power efficiency (at 1,000cd/m2) is a result of Universal Display's PHOLED high luminous efficiency and the low drive voltage of Novaled's doped transport materials.

Universal Display: www.universaldisplay.com