The Borchert lab is a group of researchers at the University of Freiburg and Fraunhofer Institute for Solar Energy Systems. Our vision is to develop and understand novel materials for the clean energy solutions of the future. We work on perovskite solar cells with a focus on perovskite-silicon tandem solar cells and perovskite thin-film deposition techniques. At Fraunhofer ISE we form the “Perovskite Materials and Interfaces” group and at the University of Freiburg the “Optoelectronic Thin Film Materials” junior research group. Both groups are interlinked and led by Dr Juliane Borchert.

• Master Thesis TopicsOctober 29, 2026
  Perovskite based solar cells have in the last years become a dynamic research field which promises to change the way we will produce electricity in the future. In our research group we work on perovskite based solar cells especially tandem solar cells. We are a team of 15 group members who come from a varietyContinue reading “Master Thesis Topics”
• New Paper: Designing Bifunctional Passivation MoleculesOctober 29, 2026
  Mitigating non-radiative recombination at the perovskite/C60 interface is critical for achieving high-efficiency perovskite solar cells. A common strategy relies on small organic, mostly amino- or ammonium-functionalized molecules as interfacial layers. Combining these functionalities with carboxylic or phosphonic acids offers a route to target multiple defect types, yet design principles for such bifunctional molecules remain poorlyContinue reading “New Paper: Designing Bifunctional Passivation Molecules”
• Renewable Energy Meets Hacker ConferenceJanuary 7, 2026
  Under the title “Recharge your batteries with us – an empowering journey through the energy transition” Juliane teamed up with Simone Herpich from Balkonsolar e.V. to talk about the energy transition to the biggest hacker conference in Europe. You can check out the talk here: Recharge your batteries with us – media.ccc.de
• New Paper: Understanding Postdeposition Treatments of HTL SAMsJuly 1, 2025
  The introduction of carbazole-based self-assembling molecules (SAMs) as hole transport layers (HTLs) has been a key step in the development of highly efficient perovskite-based solar cells. To this date, most SAM-related studies have focused on the optimization and understanding of SAMs by changing system parameters before or during the SAM formation process. Postdeposition treatments, likeContinue reading “New Paper: Understanding Postdeposition Treatments of HTL SAMs”