Publication date: 15th May 2025
Tin sulfide (SnS) and tin selenide (SnSe) are promising 2D metal chalcogenides known for their low toxicity, natural abundance, and optoelectronic properties. Orthorhombic α-SnS and SnSe are particularly suitable for solar light absorption due to their availability, high absorption coefficients and bandgap, which is positioned within the Shockley-Queisser limit for optimal solar cell efficiency. The control of size, shape, and composition of SnS- and SnSe-nanostructures is therefore important for both basic science and potential applications.
Here we demonstrate that 2D SnSe- and SnS-nanosheets, and SnSe/SnS core/crown heterostructured nanosheets (HNSs) can be synthesized by colloidal wet chemistry methods. We demonstrate that especially the reactivity of anionic S- and Se-precursors plays a crucial in the formation of 2D HNSs. The addition of a highly reactive S-oleylamine precursor during the growth of SnSe nanosheets leads to intermediate formation of a SnS-crown inside a SnSe nanosheet and the formation of HNSs. Furthermore, we show that also multiple crown HNSs can be produced through subsequent additions of S-Oleylamine.
The SnSe/SnS HNSs were investigated via TEM, and UV–Vis-NIR spectroscopy. STEM, HRTEM, EDX and XRD measurements were utilized to determine the elemental composition and the crystal structure of the nanosheets.
Literature: Schulz, J.; Schindelhauer, L.; Ruhmlieb, C.; Wehrmeister, M.; Tsangas, T.; Mews, A. Controlled Growth of Two-Dimensional SnSe/SnS Core/Crown Heterostructures. Nano Lett 2024. https://doi.org/10.1021/acs.nanolett.4c03393.
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.