Proceedings of nanoGe Fall Meeting19 (NFM19)
DOI: https://doi.org/10.29363/nanoge.nfm.2019.109
Publication date: 18th July 2019
Recombination is a key parameter to stablish the performance of a Solar Cell and stablish their limitations for a further optimization process. On the other hand, charge transport processes are usually not considered in the limitation of perovskite solar cell performance as 3D halide perovskites presents good transport properties. However, selective contact or the use of bulky cations in 2D/3D perovskite can also introduce a transport limitation in the cell performance. These parameters can be easily determined in other kind of solar cells as in dye sensitized solar cells (DSSCs) by impedance spectroscopy, but in the case of Perovskite Solar Cells (PSCs) this determination have been elusive. Impedance spectroscopy is a non-destructive characterization technique that can help in the understanding of these devices. Impedance spectroscopy is a characterization method in the frequency domain that allows to decouple physical processes with different characteristic times at the working conditions i.e. under illumination and applied bias. In this talk we show as solar cells using mesoporous TiO2scaffold can behave as DSSCs when the amount of deposited perovskite is low enough. As the amount of perovskite in the cell increases the behavior resembles the observed for PSCs. The analysis by impedance spectroscopy of these samples have allow as to connect both kind of devices and determine that transport and recombination are coupled in PSCs. Despite this limitation we show different examples in which impedance spectroscopy provide an excellent guide to determine the limiting processes in different kind of PSCs, providing consequently important clues to experimentalist to optimize its performance.
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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.
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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.
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