OSRAM Opto achieves high levels of efficiency and lifetime of OLED

OSRAM Opto Semiconductors has achieved record values in the laboratory for organic light emitting diodes in warm white after only two years of development. With an efficiency of 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. With this, it is now possible to improve two crucial OLED characteristics simultaneously as up to now these have generally changed in inverse proportion to one another. Higher efficiency used to mean shorter life, and vice versa.

Says Dr. Karsten Heuser, director of OLED lighting technology at OSRAM Opto Semiconductors, “Our development team has reached a real milestone for warm white OLEDs with an efficiency of 46 lm/W (CIE of 0.46/0.42 measured in the integrating sphere) and a life of more than 5000 hours. With this significant increase in efficiency and life, OLED flat light sources are approaching the values of conventional lighting solutions and are therefore becoming attractive for a wide variety of applications.”

These results were achieved as part of the “500 lm Multi-OLED Module” project under the OPAL research consortium. This 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 involved Siemens Corporate Technology, the universities in Darmstadt, Braunschweig and Augsburg, and the IPMS Dresden.

OSRAM Opto Semiconductors, www.osram-os.com.




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OSRAM’s OLED flat light sources is particularly suited to illuminated wall coverings, atmospheric canopies of light and light partitions.