Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.055
Publication date: 22nd December 2022
Photonic architectures provide means to manage light which can greatly improve the performance of many optoelectronic devices. These nanostructures bring novel pathways to couple more sunlight into solar cells or they can help light escape the bulk of an LED. However, traditional nanofabrication routes are costly, cumbersome and incompatible with high throughput processes. This is why in our group we work with soft nanoimprinting lithography, a scalable, fast and inexpensive way to produce nanostructures from a variety of materials. In this presentation I will show how we use our pre-patterned stamps to induce the long-range ordering of different types of colloids (gold colloids and perovskite nanocrystals) and exploit the optical properties of the resulting metasurface. The combination of templated induced assembly and metal colloids [1],enables 2D plasmonic crystals exhibiting surface plasmon lattice resonances in the visible with high quality factors (> 60), which can be applied to enable lasing from an organic dye. Similarly, nanoimprinting lithography can be applied to cesium lead halide perovskite nanocrystals [2,3] (CsPbBr3 NCs) to produce a photonic structure that improves photoluminescence from the material and even enables a reduced threshold for ASE (amplified spontaneous emission). In addition, the use of stamps with pre-patterned chiral motifs results in the seamless production of chiral perovskite metasurfaces exhibiting high circularly polarized photoluminescence with dissymmetry factors (glum) as high as 0.3 for unmodified green or red emitting NCs.
This project has received funding (AEI/FEDER,-UE) from the Spanish Ministerio de Ciencia e Innovación through grants PID2019-106860GB-I00/AEI/10.13039/501100011033(HIGHN), and CEX2019-000917-S (FUNFUTURE, Spanish Severo Ochoa Centre of Excellence program) and from the Generalitat de Catalunya (2017-SGR-00488). This research was also supported by the EIC PATHFINDER OPEN project 101046489 (DYNAMO), funded by the European Union.
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