Publication date: 13th July 2024
Indium arsenide (InAs) colloidal quantum dots (CQDs) have recently attracted significant attention due to their excellent optoelectronic properties in short-wave infrared (SWIR), resulting in the fabrication of highly efficient optoelectronic devices, such as solar cells, lasers and photodetectors. Nowadays, most CQD optoelectronic devices in SWIR are based on toxic lead and mercury chalcogenides, with limited integration into the market. On the other hand, III-V semiconductor CQDs are promising candidates to complement this gap, such as InAs CQDs, which are classified as RoHS-compliant material (“Restriction of Hazardous Substances”). Nevertheless, the applications of InAs CQDs are hindered by their low photoluminescence quantum yield (PLQY) due to the intrinsic surface dangling bonds and surface trap states. To address this challenge, new synthetic approaches have recently been proposed, reaching PLQYs above 40% with the epitaxial growth of thin ZnSe shell1. Therefore, here we synthesized and studied a series of InAs/ZnSexS1-x core/shell CQDs with thin alloyed shells, aiming to further confine the carriers and reduce the Auger rates in the system. Hence, we introduce an optimized seeded-growth synthesis of InAs/ZnSexS1-x CQDs reaching PLQYs up to 70%, with high crystallinity despite the large lattice mismatch. Finally, we studied the optoelectronic response of core/shell series in both single and multi-excitonic levels, showing further suppression of the Auger rates.
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.