Publication date: 17th July 2025
Copper halides are non-toxic, optically active semiconductors that can form various structural dimensionalities and dimensions. In this research, we focus on 0D (Cs3Cu2I5), and 1D (CsCu2I3) compounds based on copper-iodide complexes that show efficient broad emission in the visible range. We study these compounds both as bulk and as colloidal nanocrystals. It is known from the bulk that these compounds can change their dimensionality (0D↔1D), based on stoichiometry. We found that for colloidal nanocrystals, a reversible phase transition can occur simply by introducing a polar or non-polar dispersion medium. This phase transition is accompanied by a significant modification of the morphology from round nanocrystals for the 0D phase to micron-sized rods for the 1D phase. We explore this phase transition's reversibility and kinetics using different optical probes. In addition, we present a study of the excited-state processes associated with the broad emission in these compounds. Specifically, we studied the structural modifications associated with excited-state dynamics by synchrotron transient XRD. In these experiments, we optically pump a sample of colloidal nanocrystals with an ultra-fast laser and probe them with a pulsed X-ray beam at different delays. This method can record the transient powder X-ray pattern at a temporal resolution of ~100 ps.
This research is supported by Grant 2022066 from the United States-Israel Binational Science Foundation (BSF)
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.