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Lecture Ralf Krause


18 September 2009 FWN-Building 5118.-152, Nijenborgh 4, 9747 AG, Groningen
Speaker: Dr. Ralf Krause
Affiliation: Siemens AG, Erlangen, Germany
Title: White small molecule OLEDs for lighting
Date: Fri Sep 18, 2009
Start: 16.00
Location: FWN-Building 5118.-152
Host: P.W.M. Blom/M. Kuik
Telephone: +31 50 363 8705


After a short introduction of the research topics of our department Siemens CT MM 1, the presentation will focus on the development of white organic light emitting devices (OLEDs) for lighting applications. White OLEDs are one of the emerging lighting technologies which could replace the classical light bulb in the next years.

After basic considerations concerning properties, physical processes and different concepts to make white light with organic LEDs, the efficiency staircase of OLEDs for Lighting will be discussed concerning evaporated multilayer devices. Starting point is a simple 2 colour fluorescent white. Improvements including lowering the voltage by conductivity doping, introducing of phosphorescent emitters and out coupling structures show the potential and already achieved values of OLEDs for lighting applications.

Last modified:22 October 2012 2.30 p.m.