|Project:||ESR-4: PhD at Chemnitz University of Technology, Germany|
|Topic:||Characterisation of spin dependent loss mechanisms in organic solar cells|
|Research (ESR)||Ms. Maria Saladina|
|Supervisor:||Prof. Dr. Carsten Deibel|
Characterisation of spin dependent loss mechanisms in organic solar cells
Background: Organic solar cells can be processed at low temperatures, for instance by printing or by thermal evaporation of suitable organic semiconductors. The devices can be made with high throughput at low cost. On the lab scale, power conversion efficiencies of 12% have been achieved. In order to improve the performance and lifetime, intense research is needed to understand and exploit the physics of organic solar cells. The project work proposed here intends to contribute to this purpose.
Topic: The researcher will be trained in fast spectroscopic techniques, namely nanosecond transient absorption (an all-optical pump–probe technique) and time delayed collection field technique (a fast optical pump–electrical probe technique) with the aim to study photogeneration and recombination of charge carriers in organic solar cells. These investigations will be done in dependence on parameters such as the electric field and temperature. The experimental results will be modelled and related to experimental and theoretical findings by partners in the European project SEPOMO. The researcher will perform secondments of at least one month length at some of the project partners: the organic solar cell company Heliatek in Dresden for the processing of solar cells; the University of Würzburg for performing spin-sensitive experimental techniques; the University of Mons doe the design and synthesis of organic molecules.
Group web: www.tu-chemnitz.de/physik/OPKM