Proceedings of Online seminar on properties of perovskite solar cells (CPPSC20)
Publication date: 12th March 2020
Impedance Spectroscopy (IS) has been widely used as a powerful tool to study electrochemical and solid-state devices under operational conditions. In particular, this AC perturbation technique made possible to unveil internal mechanisms occurring in Perovskite Solar Cells (PSCs). Despite that, there are still many open questions to answer. Especially, a unique equivalent circuit capable of explaining the large number of different mechanisms observed is missing. Lately, other electro-optical AC disturbance techniques, such as Intensity Modulated Photocurrent (IMPS) and Photovoltage (IMVS) Spectroscopy, have been shown to have potential to aid in understanding internal processes, when combined with IS. But the combined use of these techniques is currently limited by a lack of understanding in their relationship.
With this work, we contribute to the understanding of the relationship between IS and IMPS techniques, facilitating its combination. With the aim of improving our understanding of the internal mechanisms that dominate PSCs behaviour and contributing in the search of a unique equivalent circuit that describes the electrical response these PSCs. First, we proposed a generalized circuit valid for both techniques. Then, we show the simplification for each particular technique and the relationship between the results. In such a way, it is possible to test the proposed general equivalent circuit with different measurements (IS and IMPS).
Finally, we measured IMPS and IS in two different devises, a silicon solar cells and a PSC, and we applied the theoretical results on the measurements results. We find that in the cases of silicon both techniques complement each other. And, in the case of the PSC, we reproduced results previously found in the literature, founding also some limitations in the determination of key electrical parameters of the perovskites that need to be studied in detail.
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.