Prof. Dr. Laurens D.A. Siebbeles
Research of Laurens Siebbeles focuses on providing understanding of the nature and dynamics of charge carriers and photoexcited states in materials with potential applications in e.g. solar cells, photodiodes, light-emitting diodes, field-effect transistors and nanoscale molecular electronics. Materials of interest include conjugated polymers, molecular materials, semiconductor nanoparticles, and DNA. Charges and excitons are produced by (ultra)short laser or high-energy electron pulses, and detected by time-resolved optical and microwave or terahertz conductivity techniques. The world-wide unique combination of techniques allows us to monitor the formation, mobility and decay of excitons and charge carriers from the sub-picosecond to the millisecond time domain. The experimental research is supported by theoretical calculations of charge and exciton motion. The information obtained about the relation between material structure and the properties of charges and excitons is used to give direction to synthesis of new materials with improved functionality. The research is carried out with numerous academic and industrial (Toyota, Merck UK, BASF) partners that are involved in synthesis, structural characterization or device development.