Working fields in the area of OLEDs.
Synthesis of polymers for light emitting diodes
- Synthesis of polymers for electron and hole transport
Preparation technique
- Spin-coating processes under clean-room conditions
- Deposition technique, thermal evaporation, sputtering
- Contact technique
Electrical and optical characterization
- Cyclo voltammetry to investigate the HOMO and LUMO energy levels
- Determination of the working function of the ITO-electrode
- Ellipsometric measurements for characterizing the thickness of polymer layers
- Capacitance-voltage characteristics for gaining information on the recombination depth
Device testing
- Brightness and illuminance (cd/m2, lux)
- Energy efficieny (cd/A)
- Power efficiency (lm/W)
- Life time measurements