Proceedings of MATSUS Fall 2023 Conference (MATSUSFall23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.114
Publication date: 18th July 2023
Interest in pre-crystallisation of metal halide perovskite has increased in recent years because it allows for easy production of large quantities of powder perovskite. Perovskite thin film devices subsequently made from the powder exhibit high performance [1,2]. In this study we compare methanol, ethanol, 2-propanol and pentanol as solvents for precipitation reactions forming methyl ammonium lead iodide MAPbI3 and methyl ammonium formamidinium lead iodide MA0.5FA0.5PbI3 perovskites. Using time resolved in-situ small and wide X-ray scattering (SAXS and WAXS), we were able to follow the reaction of the dissolved methylammonium iodide and formamidinium iodide when a suspension of lead iodide was added to the system. The evolution of the diffraction pattern with time was determined whereby the structural assembly from precursors to perovskite could be followed. The perovskite formation was discovered to be, not surprisingly, initially fast on the surface and during small grain formation. However, the rate of total perovskite formation of the bulk was slower and clearly dependent on the polarity of the solvents and progressed via intermediate phases. The measurements were supported with scanning electron microscopy and optical spectroscopy techniques to correlate grain formation with functionality. Our results led to a deeper understanding of the intermediate steps during the reaction. The precipitation method to produce metal halide perovskite described in this work is cost-effective and has fewer safety issues due to the low solvent toxicity. Furthermore, the stoichiometric homogeneity achieved by the pre-crystallisation process in alcohol subsequently simplifies thin film deposition and therefore improves photovoltaic device performance over large areas. This work outlines an alternative processing route for stable photovoltaics based on perovskite powder.
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.