The German University of science and technology cooperation with Novaled Dresden he published the new white OLED, the luminous efficiency of 90 lumens per watt

Dresden University of science and technology and the German company NovaLED AG has been in the actual luminous efficiency of light emitting devices up to 90 lm/W, the brightness of equipment is 1000 cd/m2, the use of 3D light extraction system could reach 124 lm/W.

White organic light emitting diode (OLEDs) is expected to become a new generation of light source, the luminous efficiency compared with the traditional light source could be much higher. Due to the unique features of white OLEDs, bright appearance, they will have a prominent impact on the optical industry. Such a large area of ultra-thin light-emitting devices can be flexible, adjustable color, can also be transparent, and even to a variety of sizes and shapes, lighting designers to create a new design space. In the light emitting efficiency, fluorescent lamps for the new lighting technology set the threshold for the 50-70 (lm/W reflector power loss were considered), but the Dresden University of technology and Novaled AG worked closely to develop the new OLED has significantly exceeded the threshold.

Study on Application of optical physics Dresden University of Technology (IAPP, TU, Dresden) Reineke as the physicist Sebastian project leader, he said: "our method combines an innovative energy efficient lighting and light design of multilayer external coupling concept, to reach the breakthrough. Even if only using planar adjustable external coupling technology, these record equipment can still reach the luminous efficiency of 90 lm/W. If you use a special 3D external coupling is even up to 124 lm/W. "The above value is measured at the edge of the integrating sphere was matrix, only light divergence to the hemisphere, the chromaticity value is CIE (0.41/0.49). An in-depth article is also published in the prestigious journal nature.

Karl Leo director Professor IAPP said: "obviously the potential of these devices, even in the brightness of the 5000 cd/m2 as high luminous efficiency, they can still reach 74 lm/W. Therefore, high brightness and high luminous efficiency are likely to coexist. "

Novaled AG CEO Gildas Sorin said: "these results are still in the development stage, the future still need to do more research, such as how to achieve on the commercial use of acceptable product life length. Gildas Sorin added: "but the above figures clearly show that this is a major breakthrough, but also allows OLEDs to get on the stage of mainstream lighting applications. Among them Novaled PIN OLED technology is a key, especially in the combination of high efficiency and high brightness is the most important. White OLEDs will help us to reduce carbon emissions, and Novaled doping modulation photochromic technology will play a key role in this research direction. "

On OLEDs OLED (organic light emitting diode) is a semiconductor, organic material layer made of thin to several nanometers and, by diffusion in the form of light source area to emit light. In this rapidly growing display panel market, OLED is an important part of the innovation, so that the ultra-thin, ultra high efficiency, rich colors, the design of a flexible vision into reality. OLED represents a future filled with many new light-emitting applications. Organic LED takes into account the color and appearance, consumers will be able to use a new way to "light" to the surrounding environment, but also to show their own style. In addition, OLED also has the potential to save more energy than the light bulb.

On research and application of optical physics IAPP Dresden University of science and technology of organic semiconductor in basic research and applied research for a research unit of leadership. Over the past few years, the Institute has launched a number of innovative organic devices. In addition, it also founded a number of companies, including Novaled AG, HELiatek GmbH, Creaphys GmbH and sim4tec GmbH.