White organic light-emitting diodes with fluorescent tube efficiency

Sebastian Reineke, Frank Lindner, Gregor Schwartz, Nico Seidler, Karsten Walzer, Björn Lüssem and Karl Leo ()
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Sebastian Reineke: Institut für Angewandte Photophysik, George-Bähr-Strasse 1, D-01062 Dresden, Germany
Frank Lindner: Institut für Angewandte Photophysik, George-Bähr-Strasse 1, D-01062 Dresden, Germany
Gregor Schwartz: Institut für Angewandte Photophysik, George-Bähr-Strasse 1, D-01062 Dresden, Germany
Nico Seidler: Institut für Angewandte Photophysik, George-Bähr-Strasse 1, D-01062 Dresden, Germany
Karsten Walzer: Institut für Angewandte Photophysik, George-Bähr-Strasse 1, D-01062 Dresden, Germany
Björn Lüssem: Institut für Angewandte Photophysik, George-Bähr-Strasse 1, D-01062 Dresden, Germany
Karl Leo: Institut für Angewandte Photophysik, George-Bähr-Strasse 1, D-01062 Dresden, Germany

Nature, 2009, vol. 459, issue 7244, 234-238

Abstract: The white light of technology Light-emitting diodes based on organic materials (known as OLEDs) are emerging as an attractive technology for a variety of lighting and display applications. If the performances of white-light OLEDs are improved, for example, they could be used to produce large-area lighting sources. That will require efficiencies on a par with existing technologies such as fluorescent tubes, which produce around 70 lumens per watt. That benchmark — 90 lumens per watt in fact — has now been achieved with OLEDs that make use of a novel emitter layer structure with high internal quantum efficiency, and high-index glass substrates to boost outcoupling efficiency. Before practical applications are possible, matters of cost, manufacturing methods and longevity need to be addressed, but the goal would be a future light source with a potentially smaller carbon footprint than today's technologies.

Date: 2009
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DOI: 10.1038/nature08003

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