Technische Chemie - Wark

Markus Becker, M.Sc.
(PhD student)

W3 3-364

+49441 798 3727

E-Mail: markus.becker(at)

Research field: perovskite solar cells



  • Thin film technology
  • ABX3 perovskite formation
  • Material characterization
  • Computational chemistry
  • Quantum Espresso
  • Gaussian09


PhD Thesis:

Title: Solution processed planar perovskite solar cells

Hybrid organic-inorganic perovskites with the general formula ABX3 have attracted great attention as light-harvesting materials for the next generation of photovoltaics. Since their first use as photoactive material in 2009, power conversion efficiencies (PCE) have already increased to a certified value of 22.1%, thereby competing with established thin-film PV technologies. Improvements in PCE have been mostly achieved by advances in the deposition process of CH3NH3PbI3 layers. We investigate ways to easily control the morphology of planar CH3NH3PbI3 films by varying the dipping conditions of the PbI2 precursor layer into an alcoholic CH3NH3I-solution or by applying solvent-engineering techniques.

Further effort is dedicated to theoretical and experimental A-cation substitutions in order to affect the crystal structure, phase transitions and optoelectronic properties of the perovskite.