Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)
DOI: https://doi.org/10.29363/nanoge.hopv.2024.253
Publication date: 6th February 2024
Metal-halide perovskites require careful growth and defect passivation strategies to reach the highest efficiency and exhibit improved long-term operational stability in optoelectronic devices. Non-radiative defect-mediated charge-carrier recombination can be inhibited by modifying perovskites with molecular compounds as passivating agents. Recently, silanes, a new generation of passivating agents, have been shown to work excellently, not only passivating the modified surface sites but also providing a hydrophobic layer giving moisture protection. Our collaborators have shown amino-silane treated FAPbI3 based perovskite solar cells to maintain 95 per cent of their initial efficiency for more than 1,600 hours when subjected to full-spectrum simulated sunlight at 85 ℃, under open-circuit conditions in ambient air. However, the structures and interactions of these silane molecules at the perovskite surfaces are not fully understood at the atomic level. Our density functional theory and ab initio molecular dynamics simulations reveal atomic-scale details of strong passivator binding of the amino-silane molecules on the defective perovskite surface. Changes in the charge density profile around all the species show silane-surface charge transfer around the surface Pb cations. Since the surface Pb ions adjacent to iodide vacancies are severely undercoordinated, the amino-silane adsorption through both N-Pb and O-Pb bonds acts by increasing the Pb coordination and eliminating the effects of surface vacancy defects, thereby effectively passivating the perovskite surface. Overall, these ab-initio simulation results also agree with our experimental findings and provide new structural and mechanistic insights at the atomic level.
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.