Mr Giuseppe GALBIATI

Mr Giuseppe GALBIATI

Zebra Cells and Module Technology for Bifacial System 

In this work, we present an overview of the recent results obtained at ISC Konstanz on interdigitated back-contact (IBC) ZEBRA cells and their module interconnection. We demonstrated the transfer and scaling-up of the cell process to the pilot line production for more than 1100 solar cells with best efficiency of 22 %.  The stability of the process for different Cz Si-wafer suppliers and the key-factors to achieve high-efficiency cells -i.e., material quality, doping profiles, patterning geometry, etc.- has been investigated: a clear insight of the features and performance of the cells will be presented.

With the clear aim to launch the BC technology to the market, ISC konstanz is currently working on several projects aiming to optimise a simple module manufacture process. In our last achievement, we obtained 300 Wp on 60 Zebra-cells module, using Eurotron back-contact module assembly line. An overview of the different projects for the module integration of the Zebra cells will be discussed with particular focus to the advantages introduced by the bifacial characteristic of the Zebra cells, a rare feature for the IBC cell architectures. In the end, we demonstrate the cost-effective of the technology presenting COO calculation between 0.4-0.7 US$/Wp for module of 300-310 Wp; these results makes the Zebra concept one of the most low-cost and high-efficiency PV technology currently available on the market. 

Biography

Giuseppe Galbiati graduated in Materials Science at the University of Milan, where he focused his studies on the characterization of silicon materials for optoelectronic devices. His expertise extends over interdisciplinary areas between research, engineering and project management. Since 2010, Mr. Galbiati has been working at ISC Konstanz's Advanced Cell Concepts Department, focusing his research on developing low-cost industrial processes for high-efficiency n-type based silicon solar cells focusing mainly on Back-Contact cell architectures (IBC and MWT). Recently he is also working on the optimization of devises for c-PV application in the low-medium intensity ranges.