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

  • Susanne Nies appointed to EU advisory group on Green Deal
    News
    12.11.2025
    Susanne Nies appointed to EU advisory group on Green Deal
    Dr. Susanne Nies heads the Green Deal Ukraina project at HZB, which aims to support the development of a sustainable energy system in Ukraine. The energy expert has now also been appointed to the European Commission's scientific advisory group to comment on regulatory burdens in connection with the net-zero target (DG GROW).

  • Long-term stability for perovskite solar cells: a big step forward
    Science Highlight
    07.11.2025
    Long-term stability for perovskite solar cells: a big step forward
    Perovskite solar cells are inexpensive to produce and generate a high amount of electric power per surface area. However, they are not yet stable enough, losing efficiency more rapidly than the silicon market standard. Now, an international team led by Prof. Dr. Antonio Abate has dramatically increased their stability by applying a novel coating to the interface between the surface of the perovskite and the top contact layer. This has even boosted efficiency to almost 27%, which represents the state-of-the-art. After 1,200 hours of continuous operation under standard illumination, no decrease in efficiency was observed. The study involved research teams from China, Italy, Switzerland and Germany and has been published in Nature Photonics.
  • Electrocatalysis with dual functionality – an overview
    Science Highlight
    31.10.2025
    Electrocatalysis with dual functionality – an overview
    Hybrid electrocatalysts can produce green hydrogen, for example, and valuable organic compounds simultaneously. This promises economically viable applications. However, the complex catalytic reactions involved in producing organic compounds are not yet fully understood. Modern X-ray methods at synchrotron sources such as BESSY II, enable catalyst materials and the reactions occurring on their surfaces to be analysed in real time, in situ and under real operating conditions. This provides insights that can be used for targeted optimisation. A team has now published an overview of the current state of knowledge in Nature Reviews Chemistry.