Novaled white top-emitting OLED reduces color shift
This white top-emitting OLED uses proprietary PIN OLED technology, which incorporates doping and host materials in association with a blue fluorescent emitting material. The device reaches a high power efficiency of 30 lm/W measured in an integrating sphere, and achieves a lifetime above 50,000 hr at an initial brightness of 1,000 cd/m2. An ITO-free top contact incorporates a light extraction material layer to enhance efficiency and reduce color shift over a wide viewing angle.
Novaled
Dresden, Germany
www.novaled.com
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PRESS RELEASE
Novaled demonstrates long lifetime and high efficiency white top emitting OLEDs
Novaled, a leading company in OLEDs for display and lighting applications, demonstrates white top-emitting devices with a lifetime exceeding 50,000 h and a power efficiency of 30 lm/W at an initial luminance of 1,000 cd/m2.
The white top emitting OLED structure offers the realisation of OLED lighting products made on metal substrates. Metal substrates bring advantages such as good heat dissipation, mechanical stability, bended designs and open the roadmap towards low cost roll-to-roll production.
Novaled has developed a high performance white top emitting OLED using the Novaled PIN OLED® technology with its proprietary doping and host materials in association with a blue flourescent emitting material from SFC Korea. In addition the device has an ITO-free top contact and corporates a Novaled-specific light extraction material layer to enhance the efficiency. At the same time this outcoupling material reduces the color shift over a wide viewing angle so that it can hardly be detected by the naked eye.
The device achieves a lifetime above 50,000 h (t50) at an initial brightness of 1,000 cd/m2. This long lifetime translates into continuous device operation for more than 5 years. By using Novaled’s proprietary doping technology, the device reaches a high power efficiency of 30 lm/W measured in an integrating sphere. Broad emission spectrum and good CIE color coordinates (0.46/0.42) were achieved in the devices, which is close to illuminant A and inside the US Department of Energy (DOE) quadrangles.
“With this achievement Novaled demonstrates once again the robustness and potential of its PIN technology”, says Gildas Sorin, Novaled CEO. “Configurations like top or bottom, inverted or non-inverted organic structures with various emitting materials and metal electrodes bring the proper high performance for each specific market request in the display and lighting domain.”
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