European pilot line for innovative photovoltaic technology based on tandem solar cells

Production line for solar cells.

Production line for solar cells. © Qcells

PEPPERONI, a four-year Research and Innovation project co-funded under Horizon Europe and jointly coordinated by Helmholtz-Zentrum Berlin and Qcells, will support Europe in reaching its renewable energy target of climate neutrality by 2050. The project will help advance perovskite/silicon tandem photovoltaics (PV) technology’s journey towards market introduction and mass manufacturing.

PEPPERONI‘s goal is to identify and address the barriers to tandem solar technology’s market introduction, and ultimately lay the foundations for new production capacity in Europe. A pilot line enabling this development will be established at Qcells’ European headquarters in Thalheim, Germany. The project began on 1 November 2022, with the long-term vision of enabling European industrial leadership on PV production in the global market.  

Within PEPPERONI, a pilot line for industrial-type tandem cells will be established at the Qcells European headquarters in Thalheim, Germany, and will feature innovative equipment, processes and materials to produce high-efficiency tandem cells and modules The project aims to scale up the active area of perovskite/Si tandems from the 1cm2 of today’s record devices to industry-relevant dimensions. PEPPERONI’s approach promises a fast and cost-competitive route to mass-production of PV modules of high performance and long durability.

Fabian Fertig, Director Global R&D Wafer & Cells at Qcells, said: “Qcells is proud to be part of the PEPPERONI consortium with its world-class technology partners. This research promises to break new ground in the advancement of perovskite-silicon tandem solar cell and module technology. At a time of unprecedented pressures on the current energy system, it is exciting to realise this first and transformative step towards industrial-scale manufacturing of next-generation PV technology in Europe.”

Bernd Stannowski, head of group Industry compatible processes, solar cells and modules at HZB added: “At HZB we have developed the tandem technology to world-record efficiency level on lab scale. We are now looking forward to cooperate in the PEPPERONI consortium with partners from science and industry to jointly scale this new and very promising technology up and transfer it to industry.”

Note: This is just an excerpt. Please read the full press release at Qcells-Website>

About the consortium

PEPPERONI combines European knowledge and expertise from fundamental research to small-scale testing and development of solar cells all the way to high-throughput industrial manufacturing of large solar modules. The PEPPERONI consortium counts 17 partners from 12 countries spanning across Europe. PEPPERONI is co-funded by the EU under Horizon Europe and supported by the Swiss State Secretariat for Education, Research and Innovation (SERI).

Qcells/red.

  • Copy link

You might also be interested in

  • 5000th patient treated with protons for eye tumours
    News
    19.08.2025
    5000th patient treated with protons for eye tumours
    For more than 20 years, Charité – Universitätsmedizin Berlin and the Helmholtz-Zentrum Berlin (HZB) have been jointly offering proton radiation therapy for eye tumours. The HZB operates a proton accelerator in Berlin-Wannsee for this purpose, while Charité provides medical care for the patients. The 5000th patient was treated at the beginning of August.
  • Iridium-free catalysts for acid water electrolysis investigated
    Science Highlight
    13.08.2025
    Iridium-free catalysts for acid water electrolysis investigated
    Hydrogen will play an important role, both as a fuel and as a raw material for industry. However, in order to produce relevant quantities of hydrogen, water electrolysis must become feasible on a multi-gigawatt scale. One bottleneck is the catalysts required, with iridium in particular being an extremely rare element. An international collaboration has therefore investigated iridium-free catalysts for acidic water electrolysis based on the element cobalt. Through investigations with various methods, among them experiments at the LiXEdrom at the BESSY II X-ray source in Berlin, they were able to elucidate processes that take place during water electrolysis in a cobalt-iron-lead oxide material as the anode. The study is published in Nature Energy.
  • Self assembling monolayer can improve lead-free perovskite solar cells too
    Science Highlight
    04.08.2025
    Self assembling monolayer can improve lead-free perovskite solar cells too
    Tin perovskite solar cells are not only non-toxic, but also potentially more stable than lead-containing perovskite solar cells. However, they are also significantly less efficient. Now, an international team has succeeded in reducing losses in the lower contact layer of tin perovskite solar cells: The scienstists identified chemical compounds that self-assemble into a molecular layer that fits very well with the lattice structure of tin perovskites. On this monolayer, tin perovskite with excellent optoelectronic quality can be grown, which increases the performance of the solar cell.