Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.125
Publication date: 16th December 2024
Double perovskites and chalcogenide perovskites: variations on the theme.
Lead halide perovskites are photovoltaic absorbers with excellent optoelectronic properties and impressive efficiencies. However, their instability in air and moisture, and the presence of lead (which raises health concerns), pushed the research community for searching for alternatives. Lead-free perovskites have therefore attracted the researchers’ interest, thanks to their varied compositions and diverse properties. In this talk, two different types of lead-free perovskites will be discussed: double perovskites and chalcogenide perovskites. Double perovskites are obtained through heterovalent substitution of Pb2+ with a mono and trivalent cation, with a resulting “doubling” of the structure. Cs2AgBiBr6, the representative of this family, presents excellent stability in air atmosphere, but low solar cell. On the other hand, chalcogenide perovskites present the traditional perovskite ABX3 structure but, being X=S2-, the cations have higher valency (such as Ba2+ and Zr4+ in BaZrS3). Even if these chalcogenide perovskites have promising optoelectronic features, their synthesis is challenging, resulting in little characterization available and no devices reported.
In this talk, I will present these materials, the reasons behind the discussed limitations and possible strategies to overcome them.
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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.
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