Laurens Siebbeles group
Our research focuses on providing understanding of the nature and dynamics electronic excited states and charge carriers 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 semiconductor quantum dots, nanorods, nanosheets, two-dimensional layered materials and organic molecular materials.
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 dynamics. 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) partners world-wide.