Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
DOI: https://doi.org/10.29363/nanoge.hopv.2022.172
Publication date: 20th April 2022
The chemical instability of hybrid halide perovskites in protic solvents remains the main obstacle for their application including solar fuels generation. In our work, we successfully stabilize Ruddlesson-Poppler perovskite PEA2PbI4 in aqueous solutions. Dissolved phenylethylammonium iodide salt forms a dynamic equilibrium preventing the perovskite degradation in water. In-situ UVvis spectroscopy and in-situ photoluminescence spectroscopy enable to monitor the respective process behind the perovskite stability. Additionally, inductive coupled mass spectroscopy (ICP-MS) reveals the compositional changes of the electrolyte after perovskite immersion. Furthermore, the hydrogen evolution reaction was studied in a three-electrode setup with the iodine evolution as counter reaction. This result denotes the possibility to use perovskite absorbers for solar fuels generation in aqueous media, providing valuable information on the general understanding of the degradation of perovskites and opening an exciting window to novel applications of perovskite absorbers.
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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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