Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)
DOI: https://doi.org/10.29363/nanoge.hopv.2024.013
Publication date: 6th February 2024
Halide perovskites have revolutionized the field of photovoltaics through their remarkable performance in single as well as tandem solar cell devices. One intriguing property of this material class is the wide tunability of the band gap which enables a fine-tuning of optical and electronic properties. In this talk, I will I revisit some of our earlier work regarding the analysis of the valence and conduction band positions of tin and lead based 3D perovskites. Combining photoelectron spectroscopy with density functional theory we were able to distinguish influences from the atomic level positions, the bond hybridization strength, as well as lattice distortions.
Recently, we also started working on 2D perovskites, which are gaining more and more attention as a strategy to tailor interfaces; they turned out to be a key factor to unlock high efficiencies in perovskite solar cells. Here, the effect of the choice of the bulky cation on the position of the charge transport layers is less clear and published measurements often seem contradicting. I will present a systematic study on alkyl-based organic cations with varying chain length, which are selected to form Ruddlesden Popper as well as Dion-Jacobson structures.
Since such 2D perovskites are most commonly used as a thin interlayer on top of 3D films, I will also present some of our results gathered at such modified surfaces. Notably, using reflection energy loss spectroscopy (REELS) we are able to determine the surface band gap of these samples which helps us to understand the formation of such 2D surface layers.
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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.