European Commission
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Description of the organisation

The Leibniz Institute for Crystal Growth (IKZ), part of Forschungsverbund Berlin e.V. (FVB), is a research and service institute, focusing on development and preparation of mono- and multicrystalline materials. The materials presently in development are of fundamental importance in micro- , opto- and power electronics, in photovoltaics, in opto- and laser technology, in acousto-electronics and sensor technology as well as for fundamental research. IKZ investigates the scientific-technical aspects of crystal growth, processing and physico-chemical characterization of crystalline solids. This ranges from explorative fundamental research to pre-industrial development. The research activities of the institute include bulk single crystals as well as crystalline layers and nanostructures, but also the development of comprehensive crystal growth technologies.
The research group Si/Ge nanostructures focuses on the following topics: the growth of Si and Ge nanowires by MBE, the growth of crystalline Si on glass by steady-state solution growth, and the preparation of precursors for CIGSe microconcentrator solar cells. All three topics involve the use of metallic solvent droplets to initiate controlled growth.

Main contact

Torsten Boeck




IKZ offices in Berlin


Role in the Project

The research group has long-term experience both in the low-temperature growth of microcrystalline silicon layers from metallic solutions on amorphous substrates, and in the defined arrangement of metallic microdroplets on flat substrates. Both aspects are of high significance to the CHEETAH project, where the group is involved in two topics. The first topic is the preparation of thin silicon layers for the development of low cost silicon solar cells. Porous silicon substrates are epitaxially thickened by steady-state solution growth, and the epitaxial silicon foils produced in this way can then be detached from the parent substrate, which is reused for another round of porosification and epitaxial thickening. The second topic concerns the preparation and optimization of well-defined arrays of precursors for CIGSe microconcentrator solar cells. For this purpose, parameters have been determined for adjusting the precursor size, morphology and defined arrangement to the requirements of the final solar cells.


Key people involved

Roman Bansen
PhD student since 2011, he is concerned with the deposition of silicon from metallic solutions on low cost substrates.



Dr. Torsten Boeck
Project leader in IKZ for the deposition of silicon from metallic solutions on low cost substrates and for the development of CIGS microconcentrator solar cells.



Dr. Maike Schröder
Scientific assistant of the director of IKZ and head of science management.



Dr. Franziska Ringleb
Project coordinator, Franziska Ringleb is a postdoctoral scientist concerned with preparation and characterization of CIGS absorber structures.



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