Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)
Publication date: 6th February 2024
Sn-based perovskites have a large processing window, rapid crystallization, and variable bandgap [1]. This makes them an ideal material to function as the low-bandgap cell for roll-to-roll flexible all perovskite tandem foils. In roll-to-roll processing, ambient conditions are ideal in terms of scalability and affordability. However, Sn-based halide perovskites struggle with rapid oxidation of Sn2+ to Sn4+. The formation of Sn4+ leads to rapid and severe degradation of the semiconductor quality, presumably by causing Sn-vacancies [2]. Therefore, to perform roll-to-roll processing in ambient conditions, a strategy to prevent the oxidation of Sn during deposition is necessary, as ambient air would oxidate conventional perovskite precursors.
In this work, Sn-based perovskites are made from a stable intermediate, where the intermediate prevents oxidation. The stable intermediates are combined with methylammonium iodide (MAI), formamidinium iodide (FAI), or cesium iodide (CsI), and can be encapsulated before transforming them into perovskite. Two different routes are explored, one with a stable Sn-intermediate in the Sn(0) oxidation state, and one with a stable Sn-intermediate in the Sn(II) oxidation state. Different transformation methods are shown to successfully transform Sn-based intermediates into perovskites. In a simple one-step vapor deposition procedure, commercially available Sn(0) foil and a Sn(II):EDTA complex are transformed into fully cubic perovskite. Additionally, transformation into perovskite is demonstrated by laser annealing with a 405 nm CW laser, and perovskites are formed by heating precursors with a flat iron.
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.