2023 - 2026


Project: Sustainable Antimony Chalcogenide Thin-Film TAndem Solar Technology (ACT-FAST)
Project ID: PCI2023-145986-2
IREC Role: Partner
Main IREC Group: Solar Energy Materials and Systems, Alejandro Pérez-Rodríguez

The main objective of ACT-FAST is to develop the first high efficiency fully thin film tandem solar cells. Cells will be based on emerging earth abundant antimony chalcogenides, using novel and low-cost techniques, low environmental impact materials and scalable depositions processes. This will yield a technology compatible with future upscaling for mass deployment. The project aims to exploit the key benefits of antimony chalcogenides:

  • low fabrication temperatures
  • high stability
  • low environmental impact
  • low carbon footprint
  • high versatility, to deliver on the vast potential for novel high efficiency TF tandem devices


ACT-FAST brings together top research groups from Tallinn University of Technology, University of Liverpool , UPC, IREC, and Università degli Studi di Verona. The consortium has a strong support from the involvement of industrial partners in Advisory Board (AB) and directly supporting the R&D activities in the project.

Acknowledgements (in Spanish)

El proyecto ACT-FAST (PCI2023-145986-2) está financiado por MICIU/AEI /10.13039/501100011033 y Cofinanciado por la Unión Europea.