Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)
DOI: https://doi.org/10.29363/nanoge.hopv.2024.169
Publication date: 6th February 2024
Recently, two-dimensional (2D) perovskites have gained significant interest in perovskite solar cells and light-emitting diodes (LEDs) due to their combined chemical stability and tunable bandgap properties. The layer thickness and interlayer distance in 2D perovskite structures significantly influence their physical and chemical properties, such as a decreasing bandgap with increasing layer number. However, research on the dependence of ion transport properties on interlayer distance in 2D halide perovskites remains limited. This study investigates the crucial role of interlayer distance in ion transport properties of 2D perovskites. By incorporating cations of varying sizes (propylammonium iodide (PAI), hexylammonium iodide (HAI), and octylammonium iodide (OAI)), we demonstrate a strong dependence of both ionic and electronic resistivity on interlayer distance and crystallographic direction. For vertical transport (perpendicular to PbI6 layers), both resistivities increase markedly with increasing interlayer distance, with ionic resistivity exhibiting a more pronounced rise. Conversely, horizontal transport (parallel to PbI6 layers) shows decreasing ionic resistivity but increasing electronic resistivity with increasing interlayer distance. Notably, ionic resistivity and the time constant for ion migration decrease under illumination as the interlayer distance increases. This trend coincides with the observed acceleration of degradation by iodine extraction under illumination with increasing interlayer distance, suggesting faster degradation. These results provide valuable criteria for selecting 2D perovskites for surface passivation applications aimed at enhancing perovskite stability.
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MIST: 2022R1A2C1091017).
Appendix
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.