EASi – Epitaxy-free absorber for cost-efficient tandem solar cells based on silicon

Prof. Dr. Tobias Wietler
Tel.: +49(0)5151-999 644
E-Mail: t.wietler@isfh.de

Tandem solar cells based on silicon are an attractive option for future Si-PV applications as they combine cost-efficient silicon technology with significant improvements of the energy conversion efficiency. In EASi, we are developing cost-efficient components for the fabrication of tandem solar cells based on silicon. The aims of the project are:

  • Development of a robust bottom solar cell with passivating contacts that can be combined with different top solar cells
  • Development and characterization of the functional interface between the passivating front side contact of the silicon solar cell and a top solar cell
  • Evaluation and development of the synthesis of epitaxy-free semiconductors on silicon

At the end of the project, we will combine all components to demonstrate an epitaxy-free tandem solar cell based on silicon with an energy conversion efficiency of 25%.

Associated partners

Meyer Burger Logo
Evonik Logo
Heraeus Logo

Duration of the project

01.06.2016 – 30.11.2019


The project is funded by the Federal Ministry for Economic Affairs and Energy under grant no 0324040. The responsibility for the content of this publication lies with the authors.

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