Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
DOI: https://doi.org/10.29363/nanoge.hopv.2022.211
Publication date: 20th April 2022
Impedance spectroscopy (IS) is a powerful technique to characterize the internal electrical processes during the operation of the devices. Intensity-modulated photocurrent (IMPS) and photovoltage (IMVS) spectroscopies have been also used to characterize the internal electronic processes, including the optical properties as well. These three techniques are usually implemented independently, generally employing an Equivalent Circuit (EC) for IS,[1] and the characteristic frequencies for IMPS and IMVS.[2] Recent studies have shown that the combination of these techniques has great potential,[3]but at the same time, implementing this procedure is a challenge.[4] In this talk, we will present the characterization of different kinds of optoelectronic devices, such as solar cells and photoelectrochemical cells, by combining the three techniques into a joint model. We will first introduce a general equivalent circuit, suitable for the three techniques and different devices. We will show how it can be used to identify a more accurate model for the device, exposing limitation processes, and how it can be used to fit the three techniques, extracting quantitative parameters.[5] As an alternative method, we will also present the deduction of the three transfer functions from fundamental equations, using the results to fit the experimental data of three techniques simultaneously. Whith this talk, we will expose the limitations of each technique when used independently and how to combine them to overcome these limitations and obtain more detailed information.
This project has received funding from the European Union’s Horizon 2020 MSCA Innovative Training Network under grant agreement No 764787. A.O.A., E.M.M. and F.F.-S. the authors want to acknowledge Ministerio de Economía y Competitividad (MINECO) from Spain under the project, ENE2017-85087-C3-1-R. S.R. acknowledges funding from the Helmholtz association via the project PEROSEED.
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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.
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