Novaled reaches 100,000h lifetime for a highly efficient white OLED
Based on its proprietary Novaled PIN OLED® technology and materials, Novaled achieved significant improvements for white OLEDs for lighting applications. An OLED device with an efficiency of 35 lm/W at a brightness of 1,000 cd/m2 and a lifetime of above 100,000 h has been realized. The device exhibits CIE colour coordinates of x,y = 0,43/0,44 with a colour rendering index CRI of 90.
The OLED features a stacked setup with blue fluorescent and red/green phosphorescent emitter materials (hybrid approach). For the stacking layer and transport layer Novaled proprietary materials have been used. The OLED device is equipped with a standard outcoupling enhancement film. The measurement was carried out in an integrating sphere taking into account only the full forward emission with substrate edges and backside covered, thus corresponding to a real case application. At a brightness level of 4,000 cd/m2 the efficiency is 31 lm/W, with no significant changes in colour and CRI value.
With this achievement Novaled proves once more the advantages of its technology and associated materials for an OLED device combining high performance and long lifetime”, says Jan Birnstock, Novaled VP Technology Transfer. We are working on enhanced outcoupling solutions and large area devices. When associated with a proper phosphorescent blue, we are confident of reaching 100 lm/W combined with a long lifetime in the near future.
OLEDs are Semiconductors made of thin organic material layers which are only a few nanometers thick. They emit light in a diffuse way as an area light source. In a fast growing market OLEDs are key part of a revolution: the dream of paper thin, highly efficient lighting with brilliant colours and a great flexibility in design is becoming reality. OLEDs represent the future of a vast array of completely new lighting applications and, at the same time, offer the potential to become even more efficient than energy-saving bulbs.
Founded in 2001, Novaled experienced a rapid growth maturing into a world-class company. Novaled commercializes its Novaled PIN OLEDTM technology along with its proprietary OLED materials to display makers and lighting companies. The company has a strong IP position in OLED technology based on more than 300 patents granted or pending. Www.novaled.com
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