This symposium focuses on the fast-evolving field of multijunction perovskite solar cells, emphasizing materials innovation and deeper physical understanding enabled by advanced characterization. The rise of perovskite-based tandem and triple-junction architectures continues to redefine efficiency benchmarks, accelerating progress from laboratory demonstrations toward scalable technologies. As these complex heterostructures mature, interface energetics, defect tolerance, and long-term stability emerge as central challenges. To address these issues, the symposium will highlight recent advances in synthesis, device engineering, and characterization. We welcome contributions that push beyond state-of-the-art methods, including thin-film growth, device development, structural and chemical analysis, as well as in-situ and operando probes of carrier dynamics, degradation pathways, and subcell-resolved performance. A particular emphasis will be placed on interfaces, which increasingly require correlative, multimodal, and data-driven approaches linking processing parameters and local structure to macroscopic performance and stability. The symposium also aims to explore materials discovery and interlayer design as key levers for improving efficiency and durability. Studies introducing novel wide- or narrow-bandgap perovskite absorbers, selective contact materials, and interface modifiers will be featured, complemented by computational insights that guide materials selection. Together, these perspectives will support a comprehensive discussion on the rational design of next-generation multijunction perovskite devices.
- Emerging perovskite compositions and wide/narrow bandgap absorbers
- Correlative and data-driven approaches linking processing and performance
- Interface energetics, band alignment, and interlayer engineering
- Silicon/perovskite and thin-film/perovskite tandem solar cells
- From single-junction to all-perovskite multijunction device architectures
- Stability and degradation pathways in complex heterostructures
- Scalable fabrication and industrial translation of multijunction devices
- Structural, optical, and electronic characterization across scales
- Advanced microscopy and diffraction for thin-film and interface analysis
- Operando and time-resolved measurements of device functionality
Philip Schulz holds a position as Research Director for Physical Chemistry and New Concepts for Photovoltaics at CNRS. In this capacity he leads the “Interfaces and Hybrid Materials for Photovoltaics” group at IPVF via the “Make Our Planet Great Again” program, which was initiated by the French President Emmanuel Macron. Before that, Philip Schulz has been a postdoctoral researcher at NREL from 2014 to 2017, and in the Department of Electrical Engineering of Princeton University from 2012 to 2014. He received his Ph.D. in physics from RWTH Aachen University in Germany in 2012.
Stefan Weber (born 1981) studied Physics at the University of Konstanz. Already as an undergrad student he started to work with an SFM in the group of Prof. Leiderer. For his diploma thesis under the supervision of Prof. Dr. Johannes Boneberg he studied the interaction of gold nanoparticles with pulsed laser light. In 2007, he joined the group of Prof. Butt at the Max Planck Institute for Polymer Reaearch (MPI-P), Mainz. During his PhD, he spent six months at Seoul National University, Korea, in the groups of Prof. K. Char and Prof. C. Lee. In 2010 he received a joint doctoral degree from Mainz University and SNU. In 2011 he went to University College Dublin as a Feodor Lynen Fellow (Alexander von Humboldt Foundation) to join Prof. Brian Rodriguez and Prof. Suzi Jarvis. In 2012 he became a group leader in the Physics of Interfaces group in the department of Prof. Hans-Jürgen Butt at the Max Planck Institute for Polymer Research (MPI-P), Mainz. From 2015 to 2023 he held a junior professor postition in the Physics department of Mainz University. Sind June 2023, he is a permament group leader at the Institute for Photovoltaics at University Stuttgart, where he heads the Nanoscale Microscopy and Characterization group. In 2024, he won an ERC Consolidator grant for the development of a Photovoltaic Microscope that combines nanoscale electrical imaging with high-resolution optical microscopy and ultrafast spectroscopy