Contact Press / Media
Dr. Ralf Preu
Phone +49 761 4588-5260
The PV-TEC – Photovoltaic Technology Evaluation Center at Fraunhofer ISE was established in 2005 to fill the gap between laboratory research and industrial application. State-of-the-art processing and characterization equipment is available in this large laboratory for the development of silicon solar cells.
PV-TEC focuses on the following core topics in the fields of production and measurement technology for crystalline silicon solar cells:
PV-TEC supports enterprises from all parts of the PV value chain, such as manufacturers of solar cells, modules, processing equipment and materials (silicon and processing materials).
In PV-TEC at Fraunhofer ISE, we are working on continuous further development and optimization of the standard process to produce silicon solar cells, and extend this with innovative processes such as diffusion and laser processes to create selective emitters or printing processes for fine linear contacts with contact widths of less than 30 μm. This ensures that a high-quality, continually optimized baseline process is available in PV-TEC, which forms the reference for process development. PV-TEC is also able to use partly processed solar cells in all industrially widespread formats and to evaluate selected processes and processing sequences.
The current focus of work is on the PERC solar cell (passivated emitter and rear cell), which enables a significant increase in efficiency and is currently being introduced to the market by numerous companies. A further emphasis is on solar cells with passivated contacts with a potential efficiency value exceeding 25 %, which represent the next developmental step.
Wet-chemical batch and inline equipment for texturing, purification and single-sided surface processing
Fully automated tubular furnace facility for diffusion, oxidation and deposition of polycrystalline Si layers
Fully and partly automated PECVD equipment to deposit dielectric and intrinsic and doped amorphous Si films
PVD (physical vapor deposition) equipment to deposit layers of metals and transparent conductive oxides (TCO)
PV-TEC back end
Printing and laser technology processing equipment
Inline furnaces equipped with very flexible cell testers
Fully automated screen-printing line including a dispensing unit for fine linear metal contacts on the front surface
Numerous partly automated printing processing systems: screen-printing, dispensing, ink-jet and rotary printing