Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
Publication date: 22nd December 2022
Two-dimensional layered perovskites (2DLPs) represent an emerging class of materials where a semiconducting metal-halide octahedral layer is sandwiched between two layers of bulky organic cations [1], [2]. The most commonly studied cations are aliphatic or aromatic ammonium molecules with no additional functional groups, like butylammonium or phenethylammonium. However, introducing a second functional group on the non-ammonium terminus could enable strong surface interactions between 2DLPs and other nanomaterials, ultimately leading to the formation of heterostructures. Here, we report on the synthesis of lead-based 2DLPs with cysteamine as the organic ammonium cation, where the thiol group acts as a potential anchoring site for the post-synthetic treatment with Au nanoparticles. We found that both, the chain length of the thiol ligand covering the Au nanoparticle surface and partial ligand stripping influence the decoration process and yield. Furthermore, we show the light-driven deposition of Ag nanoparticles as an alternative route toward the decoration of 2DLPs. The fabrication of such metal-2DLPs heterostructures offers an opportunity to investigate electron-transfer phenomena at the surface of 2DLPs and the interchange between these materials that could lead to their application in photocatalytic reactions among others.
Funded by the European Union under grant agreement No 101067869.
Funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Executive Agency (REA) as granting authority. Neither the European Union nor the granting authority can be held responsible for them.
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