Philips and Novaled announce new records for lifetime and efficiency of high-brightness white OLEDs

06-09-2006: Royal Philips Electronics and Novaled announced that in a joint research effort between Philips Lighting, Philips Research and Novaled, an unsurpassed record combination for efficiency and lifetime of high-brightness white OLEDs (Organic Light-Emitting Diodes) has been established.

Philips and Novaled reached a new record for the power efficiency of a white OLED, obtaining 32 lm/W with colour coordinates of 0,47/0,45 and a CRI of 88 at a brightness of 1000 cd/m2. That same device structure thereby simultaneously shows a lifetime of more than 20000 hours which is a major achievement for a future commercialization of the OLED technology for lighting applications. The efficiency of the device was measured using an integrating sphere using only the forward emission cone of the OLED device without attaching any lens or any other volume type luminaire to the OLED device. This is the only method to reliably predict power efficiency values for large area lighting tiles.

"This is an important step forward, as it consistently proves the potential of the OLED technology for lighting applications and shows continuous strong advancements in the technical development," comments Dr. Dietrich Bertram, manager of the OLED development at Philips Lighting.