Osram
has announced a record-breaking flexible OLED, while a EU-funded group
headed up by Imec will also pursue flexible OLEDs with built-in
intelligence. NanoMarkets has published an OLED materials market report
and the OSA has published a volume of OLED research papers.
Osram achieves record efficiency using for OLEDs
Researchers from Osram have developed a flexible OLED technology which reached an efficiency of 32 lm/W – a record value according to the company.
The OLED design uses a top-emitter approach, where light is emitted out the top of the device rather than through the substrate as in traditional rigid OLEDs. The highly-reflective substrate is a thin steel foil (~100 µm). Top-emitter designs have traditionally been a more challenging approach to producing high-quality white light.
Osram achieves record efficiency using for OLEDs
Researchers from Osram have developed a flexible OLED technology which reached an efficiency of 32 lm/W – a record value according to the company.
The OLED design uses a top-emitter approach, where light is emitted out the top of the device rather than through the substrate as in traditional rigid OLEDs. The highly-reflective substrate is a thin steel foil (~100 µm). Top-emitter designs have traditionally been a more challenging approach to producing high-quality white light.
To ensure product consistency and scalability, the OLED approach was tested on a large-surface OLED sample using a fixed brightness setting of 1000 cd/m2. The measurements were made in an integrating sphere – without using any manipulating macroextractors such as lens assemblies to help increase the light yield.
Osram’s head of technology, Thomas Dobbertin, stated that “with this sample, we are able to demonstrate that flexible OLED can already be significantly more efficient than halogen lamps. This was only made possible thanks to our ability to transfer our strong competence in the field of vacuum processing of organic functional materials and space-saving thin-film encapsulation onto flexible OLED.”
In related news, Osram was the OLED provider behind a very large, interactive OLED installation at the Qubique design fair at the Tempelhof airport in Berlin. The 6-meter-high cubic structure (12 x 12 m total) contains numerous 2-mm thick OLED panels arranged in a three-dimensional interactive display. The display uses sound and motion sensors to respond to a viewer’s approach. The installation was designed by Simon Brünner and contains 1362 OLED light modules.
Osram also recently opened its first OLED pilot production line in Regensburg, where it expects to reduce production OLED manufacturing cost by 90%.
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