DOI: https://doi.org/10.29363/nanoge.emlem.2024.029
Publication date: 13th July 2024
One of the most distinctive characteristics of semiconductor nanocrystals is their large surface-to-volume ratio. This makes their properties strongly dependent on their size, shape and surface termination (i.e., both stoichiometry and nature of passivating ligands).
The effect of these structural characteristics can be such as to significantly affect the symmetry and nature of the electronic states, modify the radiative lifetimes by orders of magnitude, and even determine the character (direct or indirect) of the optical transitions in these nanostructures.
However, owing to the chemistry involved in their synthesis, in experimental samples these effects are often masked by other factors, such as averages over a large number of dots (in ensemble measurements), shape/size/composition inhomogeneities, incomplete passivation and the presence of trap states, which make it difficult to unambiguously determine the origin of the different features observed, even in single dot experiments.
Theoretical modelling can however come to the rescue by enabling a complete decoupling of all of these effects and the isolation of specific factors.
In this talk I will give an overview of the theoretical work carried out in my group over the last few years on nanocrystals of different materials, shapes and surface termination, highlighting some unexpected properties of these versatile nanostructures and providing guidelines for their effective exploitation in devices.
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.