Proceedings of nanoGe Spring Meeting 2022 (NSM22)
DOI: https://doi.org/10.29363/nanoge.nsm.2022.233
Publication date: 7th February 2022
Colloidal 2D semiconductors (nanosheets (NSs) and nanoplatelets (NPLs)) are only a few atom layers thick and strongly quantum-confined in their thickness dimension. This leads to increased exciton binding energies in the structures and optical properties that are wet-chemically tunable from visible to infrared wavelengths. Synthetic fine-tuning of the NS and NPL to control their narrow absorption and efficient emission is highly interesting for photonic and optoelectronic applications.[1,2]
In the first part of my talk, I will touch on our recent results on the synthesis of colloidal 2D transition metal dichalcogenides (WS2 and MoS2). By adjusting the Mo- and W-precursor concentration and reaction times, a control on the formation of the semiconducting vs. the metallic TMDC crystal phase during the reaction is gained and followed by XPS. We applied micro-photoluminescence spectroscopy to study semiconducting WS2 mono- and multilayer photoluminescence comparable to exfoliated WS2 for the first time.[3]
The second part of my talk is dedicated to our results on the direct synthesis of infrared-emitting 2D PbSe NPLs. By synthetically tuning the lateral size of the NPLs through the addition of small amounts of octylamine to the reaction, we obtain efficient emission of the NPLs covering the telecom O-, E- and S-band, respectively.[4] Infrared emitting NPLs are highly interesting for emerging photonic quantum technologies, e.g. single photon emission at technologically relevant wavelengths.
Funding by the German Research Foundation (DFG) under the Excellence Strategy of the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453) is greatfully acknowledged.
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.