Royal Philips Electronics and Novaled recently announced the achievement of a record combination for efficiency and lifetime of high-brightness OLEDs (organic light-emitting diodes.)
Philips Lighting, Philips Research and Novaled collaborated on the research effort that produced the breakthrough.
The new record for a white OLED's power efficiency was 32 lm/W with color coordinates of 0.47/0.45 and a CRI of 88 at a brightness of 1,000 cd per meter-squared.
That same device structure shows a lifetime of more than 20,000 hours, which is promising for future commercialization of the OLED technology for lighting applications.
The efficiency of the device was measured with 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.