VUV photoemission using synchrotron light: a tool for characterising surfaces and interfaces occurring in OLEDs
|Jacques Ghijsen 1, Robert L. Johnson 4, Andreas Elschner 3, Norbert Koch 2|
1. University of Namur, Laboratoire Interdisciplinaire de Spectroscopie Electronique (LISE), 61 rue de Bruxelles, Namur 5000, Belgium
In principle, organic light-emitting diodes (OLEDs) just need one layer of appropriate material sandwiched between two metal electrodes in order to create light when the device is polarized. Real life is more complicated: in order to create a long-lived (> 10,000 hr) and efficient device (tens of lm/W), it is necessary to use more complex structures involving additional layers. Just as with more conventional inorganic devices, it is important to monitor the interfaces in order to identify possible reactions between the materials involved, to check for interdiffusion, and to determine the alignment of electronic levels.
Presentation: invited oral at E-MRS Fall Meeting 2003, Pre-School of Symposium B, by Jacques Ghijsen
See On-line Journal of E-MRS Fall Meeting 2003
Submitted: 2003-06-17 14:35 Revised: 2009-06-08 12:55