Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
DOI: https://doi.org/10.29363/nanoge.nfm.2022.138
Publication date: 11th July 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 2D perovskite PEA2PbI4 in aqueous solutions of phenylethyl ammonium iodide (PEAI). XPS and XRD spectroscopy allow us to determine the 2D perovskite changes before and after the water immersion. Additionally, inductive coupled mass spectroscopy (ICP-MS) reveals the compositional changes of the electrolyte after 2D perovskite immersion. Photoelectrochemical characterization was used in a three electrode setup to measure photocatalytic activity of this material toward the hydrogen evolution reaction. Furthermore, IMPS/IMVS and impedance spectroscopy was implemented to characterize the photoelectrochemical process involved in this reaction. This result denotes the possibility to use layered 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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