Publication date: 15th December 2025
As Si cells are reaching their fundamental limits, silicon/perovskite tandem solar cells are considered to be the next-generation mainstream technology. These and other perovskite-based tandem solar cells usually rely on wide-bandgap (WBG) mixed halide perovskites. However, these cells are always more or less limited by ion migration and halide segregation (HS), which is a critical factor for operational stability.[1] In this talk, I will discuss the intriguing correlation between HS, ion density, and ionic loss evolution in wide-bandgap perovskite solar cells. This also includes how recovery effects seen in HS segregation relate to a recovery in ion density and ionic losses. Related to this, I will also discuss irreversible ionic losses, which stay “locked-in” after prolonged illumination and are therefore critical for the operational stability. I will then elaborate on strategies to mitigate mobile ion-induced performance degradation. This includes pure-iodine, dimethylammonium (DMA)-stabilized WBG perovskites, which are not only efficient (>22% certified) and stable under maximum power point tracking (T80 lifetimes exceeding 8700 h), but also demonstrate notable performances under combined photothermal stressors (light + 85 °C).
M.S. acknowledges funding support from The Chinese University of Hong Kong (CUHK) through the Vice-Chancellor Early Career Professorship Scheme, the Research Grants Council (RGC) under the NSCF/RGC Joint Research Scheme (N_CUHK414/24), and the Innovation and Technology Commission (ITC) via the ITF Seed Fund (ITS/239/23).
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.