Contribution presented at the TandemPV Workshop 2025. This work is licensed under the Creative Commons Atribution-NonCommercial-NoDerivatives 4.0 International License, except where otherwise noted. For other uses, please approach the relevant copyright holder. Funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or RIA. Neither the European Union nor the granting authority can be held responsible for them. NEXUS project has received funding from the European Union’s Horizon Europe research and innovation program under grant agreement No. 101075330. Note that these are not yet results from the TANDEM project, but give a good introduction to the technology and research in the project. Project results will be presented at the 2026 TandemPV and EUPVSEC conferences.