Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
DOI: https://doi.org/10.29363/nanoge.hopv.2022.170
Publication date: 20th April 2022
The replacement of lead by tin is potentially the most promising strategy to design efficient, lead-free perovskites for future energy conversion applications [1]. However, current tin halide perovskites (THPs) still suffer under degradation, especially by oxygen or moisture, and show limited efficiencies with respect to the lead-based counterparts [2, 3]. To date, a detailed understanding of the degradation mechanisms of THPs in water environment is still missing.
Ab initio molecular dynamics (AIMD) simulations [4] are presented to unravel atomistic details of THP/water interfaces. We compare MASnI3 with the lead-based counterpart MAPbI3 to assess the impact of the B-site metal on the water-induced degradation mechanism. In addition, we study the interface between DMASnBr3, a water-stable THP recently proposed for photocatalytic hydrogen production [5], and water to understand the origins of its unprecedented water stability and the concomitant impact of the A-site and X-site variation on the THP stability. Our results indicate a facile solvation of surface tin−iodine bonds in MASnI3, while MAPbI3 appears more robust to degradation despite strong hydration of the perovskite surface. Furthermore, AIMD simulations show the formation of amorphous surface layers at the DMASnBr3/water interface, consisting of hydrated zero-dimensional SnBr3 complexes with stable Sn-Br bonds, which protect the inner structure from degradation. This observation, in combination with the higher hydrophobicity of the DMA cation, explains the water stability of DMASnBr3. Based on our results, we discuss potential routes which may assist the design of stable THPs.
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.