Publication date: 17th February 2025
The crystallisation dynamics of Sn-containing perovskites occur on significantly faster timescales, posing challenges for their synthesis[1]. Despite the similarity in perovskite formability between Pb and Sn perovskites according to the Bartel tolerance factor, Sn-based compositions more readily form 3D, corner-sharing architectures[2]. Moreover, intermediate phases - such as solvates and hexagonal polytypes – that are often observed in Pb-based systems are typically absent during the processing of Sn-containing perovskites. In this work, we investigate the crystallisation kinetics of blade-coated, pure-Pb and mixed PbSn perovskite solutions using in situ GIWAXS. Whilst typical crystalline intermediates are observed for pure Pb compositions, none are observed for PbSn compositions apart from high Cs compositions. This indicates stronger Sn-halide bonding networks and an inherent preference for corner-sharing architectures in Sn-containing compositions. Reactive force-field machine learning simulations further support this, revealing a suppression of non-corner-sharing Sn phases. To overcome this, we introduce a larger cation; DMA+ into the lattice to modulate crystallisation[3], promoting a transient 2H polytype that facilitates formation of the desired, final 3D perovskite phase. This leads to the growth of larger crystal grains, demonstrating a viable pathway to control the crystallisation of Sn-containing perovskites through engineered intermediate phases.
We acknowledge Diamond Light Source for measurements taken on the i07 beamline during sessions si30612-1, si33462-1 and si36427-1, and beamline scientist Dr. Jonathan Rawle for assistance with these measurements.
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.