Proceedings of International Conference on Perovskite Thin Film Photovoltaics and Perovskite Photonics and Optoelectronics (NIPHO23)
DOI: https://doi.org/10.29363/nanoge.nipho.2023.013
Publication date: 3rd April 2023
Ruddlesden Popper 2D layered hybrid perovskites (HP) are gaining growing importance in optoelectronics, for applications ranging from photovoltaics to lighting, especially due to their improved stability. Despite their success, the dynamics of photocarriers in these materials still need to be assessed. We exploited out technique of ultrafast optical spectroscopy, combining the measurement of differential transmission (DT) and time resolved photoluminescence (TRPL) in the same spot of the sample, to probe 2D HP single crystal (phenethylammonium (PEA)2PbI4). We compared the response of single crystals and thin films under different excitation regimes, under one-photon and two-photon excitation, both resonant and non-resonant [1]. The results that we found in the single crystal show a sharp drop of DT signal in the first picosecond, combined with the constant relation between DT^2 and TRPL decays, compatibly with what already reported in [2]. The phenomenology that we report here can be interpreted as a dissociation of excitons on a sub-ps timescale, bringing to an ultrafast formation of unbound carriers until a situation of equilibrium is reached, that governs the decay of both bright and dark species. The fact that the same behaviour was observed in thin films and single crystals can give an important clue about the real impact of edge states in 2D hybrid perovskites, suggesting that the dynamics in this material may be not governed by extrinsic effects.
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.