New Helmholtz Young Investigator Group at HZB on perovskite solar cells

Silvia Mariotti aims to advance the development of multi-junction solar cells made from different perovskite layers.

Silvia Mariotti aims to advance the development of multi-junction solar cells made from different perovskite layers. © arö/HZB

Silvia Mariotti starts building up the new Helmholtz Young Investigator Group ‘Perovskite-based multi-junction solar cells’. The perovskite expert, who was previously based at Okinawa University in Japan, aims to advance the development of multi-junction solar cells made from different perovskite layers.

‘My goal is to fabricate all-perovskite triple junction solar cells with efficiencies well above 30% and extrapolated stability of more than five years,’ says Silvia Mariotti. Perovskite-based triple junction solar cells are a relatively new area of research, with the current efficiency record standing at 28.7%. Mariotti’s first step is to develop molecularly engineered perovskite materials with tailor-made band gaps that are stable and resilient to multi-stacking processes. ‘Then, we will develop innovative deposition techniques that enable us to produce prototypes of bifacial and flexible all-perovskite triple junction solar cells,’ says the expert.

Silvia Mariotti holds a Master's degree in Industrial Chemistry from the University of Bologna and subsequently completed her PhD in physics on perovskite solar cells at the University of Liverpool. She then continued with postdoctoral positions at the University of Bordeaux, the University of Tokyo, HZB and the Okinawa Institute of Science and Technology in Japan.

‘HZB is an ideal environment for my research. Here, I have access to well-equipped laboratories, such as the Hysprint Lab, and a wide range of instruments for characterising multi-junction solar cells. And since exchange is crucial, here I can count on collaborating with several excellent research groups who are working on every aspect of perovskites. I am very much looking forward to inspiring discussions and to building my own team here,’ says Silvia Mariotti. She will also work closely with Humboldt University of Berlin.

Helmholtz Young Investigator Groups

A Helmholtz Young Investigators Group leadership position is awarded following a rigorous selection process. In addition to scientific excellence, international experience is required. Helmholtz Young Investigators Groups receive a total of at least 1.5 million euros in funding for five years and collaborate closely with a partner university. The programme offers reliable prospects for a scientific career: after a positive evaluation, a permanent position is offered.

arö

  • Copy link

You might also be interested in

  • The twisted nanotubes that tell a story
    News
    09.12.2025
    The twisted nanotubes that tell a story
    In collaboration with scientists in Germany, EPFL researchers have demonstrated that the spiral geometry of tiny, twisted magnetic tubes can be leveraged to transmit data based on quasiparticles called magnons, rather than electrons.
  • Bright prospects for tin perovskite solar cells
    Science Highlight
    03.12.2025
    Bright prospects for tin perovskite solar cells
    Perovskite solar cells are widely regarded as the next generation photovoltaic technology. However, they are not yet stable enough in the long term for widespread commercial use. One reason for this is migrating ions, which cause degradation of the semiconducting material over time. A team from HZB and the University of Potsdam has now investigated the ion density in four different, widely used perovskite compounds and discovered significant differences. Tin perovskite semiconductors produced with an alternative solvent had a particular low ion density — only one tenth that of lead perovskite semiconductors. This suggests that tin-based perovskites could be used to make solar cells that are not only really environmentally friendly but also very stable.

  • Joint Kyiv Energy and Climate Lab goes live
    News
    28.11.2025
    Joint Kyiv Energy and Climate Lab goes live
    Helmholtz-Zentrum Berlin and the National University of Kyiv-Mohyla Academy established on 27 November a Joint Energy and Climate Lab.