Advancements in Perovskite-Silicon Tandem Solar Cells | Dr. Erkan Aydin & Dr. Urs Aeberhard

Join Dr. Erkan Aydin from Ludwig Maximilian University and Fluxim's Dr. Urs Aeberhard for an in-depth webinar on the latest advancements in perovskite-silicon tandem solar cells. This session, hosted by Dr. Daniele Braga of Fluxim, covers cutting-edge techniques in the fabrication and analysis of these ultra-efficient solar cells.
Keynote Presentation:
Dr. Erkan Aydin discusses the progress and future of multijunction solar cells, including breakthrough efficiencies and applications in space and on earth.
Expert Insights:
Dr. Urs Aeberhard dives into the analysis and optimization of these tandem cells using the full opto-electronic simulation power of Setfos, Fluxim’s predictive simulation software.
Why Watch?
Learn about the forefront of tandem solar cell technology from a renowned experts.
Enhance your understanding of simulation approaches in photovoltaics.
Gain insights from leading experts in the field of solar energy research.
About the Speakers:
Dr. Erkan Aydin:
As Group Leader of the solar cell research team at LMU Munich, Dr. Aydin focuses on developing space-grade solar cells for the emerging private space industry. He has been instrumental in setting world records for perovskite-silicon tandem solar cell efficiencies. His groundbreaking work during his postdoctoral research at KAUST contributed to several efficiency milestones, pushing the limits of solar cell performance. These achievements underscore his pivotal role in advancing solar technology, making significant impacts in the field of renewable energy
Dr. Urs Aeberhard:
Dr. Aeberhard, a Senior R&D Scientist at Fluxim AG, is an expert in the field of solar cell and opto-electronic device simulation. With a PhD in condensed matter theory from ETH Zurich, his expertise is underpinned by extensive research, including pioneering work on quantum well solar cells at the Paul Scherrer Institute. His professional journey further includes significant work on nanostructure-based high-efficiency solar cells performed at Forschungszentrum Jülich, focusing on quantum transport and multiscale simulations. Since joining Fluxim in 2018 and serving as a Guest Lecturer at ETH Zurich, Dr. Aeberhard has continued working towards advancing simulation technologies for photovoltaic devices.
Hosted by Dr. Daniele Braga: Head of Sales and Marketing at Fluxim, with a research background in perovskite photovoltaics.
This webinar is essential for researchers, students, and professionals in the semiconductor and solar energy sectors.
Subscribe for more insights from industry-leading experts and stay updated on the latest in photovoltaic technology.
If you are interested in seeing how Setfos can be used in your research we offers researchers a free 1 month trial of the software.
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Here are the Q&A we didn't have time for:
Question: Hi Dr. Aeberhard, thanks for your presentation. We wonder if a similar calculation of the PCE change with the thickness or band gap change of the top PVK layer on a 1.1eV Si bottom cell in a 4T tandem can be done.
Answer: Using Setfos, you can compute the filtered bottom-cell JV curves as a function of thickness or band gap. The PCE is then found a posteriori using the voltage matching condition.
Question: For the simulation of the tandem solar cell, if I am correct for modeling the transport of carriers at the interface you use hopping from Homo to Lumo bands of adjacent layers, could you explain a bit more how this framework compares to a other interface transport models like thermionic emission or carrier tunneling.
Answer: We verified that the hopping model and trap-assisted interface recombination give very similar tandem characteristics. Eventually, what you need is a large enough rate of charge transfer around VMPP in order to avoid voltage losses (or, equivalently, losses in FF or even development of an s-shape). The main difference between junction models (especially tunneling) is the dependence on the local electric field, which can change drastically with point of operation.
Question: Thank you for a great talk by you two. I have question for Urs. How can we include surface recombination at the interface in the Setfos simulations?
Answer: There are dedicated models for interface recombination in Setfos. The full mode requires setting of the interface trap energy, trap density and capture rates for electrons and holes from either side of the interface. There is also a simplified version where you set only the interface recombination velocity and the trap energy position.
Question: Can stability analysis of the tandem can be done in this software (Setfos)?
Answer: Currently, material parameters are input quantities and do not change over time. However, assessment of lon-term stability can be supported for instance by quantifying the impact of defect evolution in the material, i.e., by analysing the state of the device at a given point in time.
Question: Can we make tandem perovskite solar cells with other semiconductors than silicon?
Answer: Indeed, there are WBG perovskite based tandems with CIGS or a narrow-band gap perovskite as the bottom cell.