OSRAM Opto Semiconductors Achieves High Efficiency Level of OLED

OSRAM Opto Semiconductors announced that it has achieved record values in the laboratory for organic light emitting diodes in warm white after only two years of development. With a 46 lm/W the organic light emitting diodes for lighting applications (OLED Lighting) have a brightness of 1000 cd/m² and last more than 5000 hours. The color rendering index (CRI) of the almost 100 cm² large prototype is 80. By March 2009, development should be so far advanced that a demonstrator for an energy-saving OLED flat light module comprising several tiles will be able to deliver an overall luminous flux of 500 lm from a power consumption of less than 10 W.



The OLED light sources will be particularly welcome where their special properties as flat light sources offering high quality of light make a real impression, for example in illuminated wall coverings, atmospheric canopies of light and light partitions. For widespread applications it will be necessary to produce efficient OLEDs in large numbers at reasonably low cost – an essential objective of the research project. The project is focusing on the optimization of the layer system comprising small molecules, in which the layers are produced by means of vacuum evaporation. In addition to OSRAM, this project involves Siemens Corporate Technology, the universities in Darmstadt, Braunschweig and Augsburg and the IPMS Dresden.