Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
Publication date: 11th July 2022
The exceptional optical features of metal halide-based perovskites nanocrystals (PS-NCs), including their adjustable size, tuneable band gap, capacity for light-induced electron transfer, and ease of synthesis have made them promising candidates for applications as visible-light photocatalysts.1 These materials' high quantum yields and long lifetimes have sparked a lot of interest in the development of new lighting technologies. However, the applications of PS-NCs are severely constrained by their susceptibility to heat, humidity, and water. Researchers have shown that embedding perovskites in a polymeric matrix can increase their stability.2 Within this context, polymeric ionic liquids (PILs) stand out due to their tuneable properties and their ability to stabilize molecular and nanostructured materials.3 These polymerizable compounds can be synergistically combined with advanced materials to design cost-effective smart materials for next generation devices. Furthermore, PILs can be specially formulated for additive manufacturing what opens up new opportunities in multiple fields, from biomedicine to electrochemistry and optoelectronics.4 This work demonstrates the possibility to encapsulate PS-NCs into PILs (PILs@PS) and directly translate the advanced properties of the PS-NCs across the scales into smart devices employing 3D printing techniques. The stability of the nanocrystals after encapsulation was enhanced, showing better stability under light, moisture, water conditions and at high temperatures. The photoluminescence (PL) and quantum yield (PLQY) remained stable for months, while that of pristine PS-NCs was fully quenched along with structure degradation in few days or even hours. As a proof-of-concept, a selected PIL@PS printed film was implemented as photocatalyst in the degradation of organic dyes using simulated solar energy.
This project has received funding from the Generalitat Valenciana (CIDEGENT 2018/036) and the European Social Fonds under the ACIF-2020 grant agreement No ACIF/2020/338.
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