Large Area OLED Device
- Thursday, 27 August 2009
Novaled (Dresden, Germany) developed a 15 x 15 cm white OLED with a thickness of less than 2 mm. The Novaled OLED stack allows for a natural and warm white light, performing with a high color rendering index (CRI) of 90 - which looks similar to sunlight or what is delivered by incandescent bulbs.
The Novaled 15 x 15 cm OLED device reaches a power efficiency of 30 lm/W at an initial brightness of 1,000 cd/m2. The CIE color coordinates at illluminant A are in line with DOE Energy Star specifications. By using Novaled's proprietary 'liternity' technology, a lifetime of 20,000 hours can be reached.
Liternity OLEDs maintain the appearance of a homogeneously lighted-up surface over the entire life span of the OLED. According to Novaled, the liternity technology will allow for the upscaling towards very large OLED panel sizes. Long lifetimes are crucial for reducing maintenance cycles in commercial applications.