However, whereas LEDs create points of light from a tiny luminescent chip, OLEDs generate illuminated surfaces using so-called OLED panels. Initial OLED products in the form of thin tiles have been on the market for two years now, and bendable variants are currently being developed.
In the rigid OLED variant, this layer and thin metal contact points are affixed to a glass panel. An inactive OLED has a hazy white or reflective surface. Transparent OLED variants are also being developed that can serve as windows during the day and sources of light in the evening. Because an OLED’s luminescent layer is flexible, researchers are also working on bendable OLED variants. Still, the flexible luminescent surfaces need to be made more efficient if they’re to be successful on the mass market.
The 32 lumens per watt achieved by the Osram scientists was in part due to a special design for the vacuum-metallized electrical contacts. The record efficiency values were measured using a large-area sample under the most realistic conditions possible, and without any lenses or other devices to increase the light yield.
One of the challenges associated with the design of flexible OLEDs involves protecting the sensitive luminescent layer against oxygen and humidity. That’s why flexible OLEDs are sealed using a special thin-film process rather than with a glass cover. A flexible steel foil no thicker than a sheet of paper, is used instead of the glass sheet on the back of the OLED.
Siemens’ Osram subsidiary has invested roughly €50 million in the development of OLEDs over the last five years. The company presented Orbeos, its first OLED product for this sector, two years ago and launched the world’s first pilot production facility in August 2011.
In an effort to rapidly prepare the technology for mass-market success, Osram recently began offering an introductory product known as Orbeos Dance that comes with an electrical ballast and connection accessories.
Dr. Norbert Aschenbrenner | Siemens InnovationNews
Researchers use light to remotely control curvature of plastics
23.03.2017 | North Carolina State University
TU Graz researchers show that enzyme function inhibits battery ageing
21.03.2017 | Technische Universität Graz
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
27.03.2017 | Earth Sciences
27.03.2017 | Life Sciences
27.03.2017 | Life Sciences