Magazine with Solar Cell Device Groups in Boats

The magazines are used in ConTEC for the feed and removal of samples from equipment during processing.

Concentrator Assemblies

R&D Services

Our R&D services comprise:

Integrating and connecting different cell concepts

Developing bespoke assembly designs

  • Planning and designing substrates (e.g. conductive path structure, substrate materials, active cooling)
  • Electrical contacting of components (bonding, welding and soldering processes)

Assembling small solar cell batches and developing production processes

Reliability and long-term stability testing

Concentrator photovoltaics employs cheap optics to focus light onto small solar cell surfaces, with different systems distinguished by their solar concentration factor. Our work primarily centers on low concentration (>1 - 50x) and high concentration (300 - 1000x) systems.

The solar cell assembly, comprising a substrate, solar cell and electrical contacts, is a key component in concentrator systems. Different system designs utilize different solar cell assembly structures, and we produce such assemblies with active and passive cooling systems in various sizes.

High concentration systems employ III-V multi-junction solar cells, and the development of such systems at Fraunhofer ISE is based at the Concentrator Technology Evaluation Center (ConTEC).

Modified silicon or thin-film solar cells are used in low concentration modules. We develop these in our PV Module Technology Evaluation Center (ModuleTEC) and at ConTEC, thus combining expertise in silicon flat-plate module technology and high concentration photovoltaics.

Research at ConTEC and the ModuleTEC primarily focuses on optimizing design, manufacturing processes and CPV module reliability. Our expertise in the field of thermal, optical and electrical simulation is shared with our clients, and we optimize and develop both manufacturing processes and innovative systems.

A variety of experimental methods are available for characterizing CPV components.

Selcted Research Projects


CPV-T System

CPV-T system combined with desalination systems




Highly efficient concentrator module with GaSb-based four-junction solar cell



CPV Module in Modular Design; Subproject: Module Design and Module Performance


Current publications - Concentrator Assemblies: