Improving the water resistance of Bi-based perovskite-inspired materials for vapor-phase photocatalytic overall water splitting
[EN] Lead halide perovskites are well known for their exceptional photophysical and electronic properties, which have placed them at the forefront of challenging optoelectronic applications and solar-to-fuel conversion. However, their air/water instability, combined with their toxicity, is still a c...
| Autores: | , , , , , , , , , , |
|---|---|
| Tipo de documento: | artigo |
| Data de publicação: | 2024 |
| País: | España |
| Recursos: | Universitat Politècnica de València (UPV) |
| Repositório: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglês |
| OAI Identifier: | oai:riunet.upv.es:10251/221725 |
| Acesso em linha: | https://riunet.upv.es/handle/10251/221725 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Lead halide perovskites Photophysical properties Electronic properties Optoelectronic applications Solar-to-fuel conversion |
| Resumo: | [EN] Lead halide perovskites are well known for their exceptional photophysical and electronic properties, which have placed them at the forefront of challenging optoelectronic applications and solar-to-fuel conversion. However, their air/water instability, combined with their toxicity, is still a critical problem that has slowed down their commercialization. In this sense, bismuth-based halide derivatives attract much interest as a potentially safer, air-stable alternative. Herein, a novel Bi-based perovskite-inspired material, IEF-19 (IEF stands for IMDEA Energy Framework), which contains a bulky aromatic cation (1,5-diammonium naphthalene), is prepared. Additionally, an N-alkylation strategy is successfully employed to achieve four water-stable perovskite-inspired materials, which contains diammonium naphthalene cations that are tetra-alkylated by methyl, ethyl, propyl, and butyl groups. Moreover, computational studies are performed to gain a deeper understanding of the intrinsic structural stability and affinity of water molecules for Bi-based perovskite-inspired materials. Importantly, the air- and water-stable IEF-19-Et (i.e., stable at least 12 months under ambient conditions and 3 weeks in contact with water) is found to be an active photocatalyst for vapor-phase overall water splitting in the absence of any sacrificial agent under both ultraviolet-visible or simulated sunlight irradiation. This material exhibits an estimated apparent quantum yield of 0.08% at 400 nm, partially explained by its adequate energy band level diagram. |
|---|