Universal Display reports on significant advances in white OLED performance toward meeting U.S. Energy Star requirements.

UDC´s Dr. Julie Brown present at the LED/OLED lighting exihibition which was held in Tokyo from 15-17 April some news about UniversalPHOLED technology.

Dr. Brown’s presentation, titled “Pushing the Envelope for White OLED Efficiency,” focused on
white phosphorescent OLEDs (PHOLEDs) as an environmentally-friendly, energy-saving
lighting technology. Dr. Brown reported data for a series of white PHOLEDs that span a range
of white colors that were designed to satisfy the requirements of differing lighting applications.

These research results range from warm to cool white with varied power efficacies of 54 to 102 lumens per watt (lm/W). Depending on the specific designs employed, the color rendering
indices (CRI’s) varied from 70 to 88, and lifetimes varied from 4,000 to 17,000 hours (to 70% of initial luminance at 1,000 nits*).

Unlike incandescent and fluorescent lighting, white OLED performance characteristics can be
tuned by manipulating the OLED materials and structures that are used. To show this effect, a
series of white OLEDs, from approximately 2,700 to 4,000 Kelvin, were developed that exceed
the Energy Star Category A Color Specification of color rendering index (CRI) of > 75 and the
Efficiency Specification of > 35 lm/W. The Energy Star lifetime specification is ? 25,000 hours (to 70% of initial luminance at 1000 nits*), however, the lifetime results for this series may be sufficient for a variety of niche products while the Company continues to develop white OLEDs that meet the requirements for more demanding applications.