Publication date: 22nd July 2026
Very high efficiencies for Perovskite-based single junction and tandem solar cells have been reached by research institutes and industry, shifting the research focus to long-term operational stability. Our longest data series for a single-junction Perovskite solar cell, currently 5.5 years long, shows pronounced seasonal variations in device performance. We investigated how this seasonal behavior can be attributed to changes in the solar spectrum, unconventional temperature-dependent behavior of aged perovskite-based devices and material metastability effects (specifically the light-soaking effect).
We show that these factors affect the two-terminal perovskite-based tandem solar cells (produced in-house) as well. However, tandem solar cells are more sensitive to changes in solar spectrum. The current mismatch between the top and bottom cell can reduce the device performance due to series connection of the sub-cells. We use indoor measurements under controlled conditions using different light spectra and operating temperatures to support the analysis.
Finally, we present the results from a one-year long dataset for six MPP-tracked industrial-size Perovskite-Silicon tandem modules (installed at an optimal 35° inclination, facing South) acquired at HZB’s test field in Berlin, Germany. Data will be presented together with monitoring results of a Silicon module as a reference, quantifying the possible gain in annual energy yield. All of the modules operated stably throughout the monitoring period, with no abnormal performance changes. Seasonal variations in relative performance were observed in the tandem modules. These changes are consistent with the changes in irradiance and module temperature.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.