Publication date: 17th July 2025
The assembly of monodisperse nanocrystals (NCs) into long-range ordered superlattices (SLs) provides a platform for engineering materials with programmable and distinct optoelectronic properties compared to those of the constituent building blocks [1]. SLs that integrate NCs of different materials can unite the different functionalities and generate new light-matter interactions [2], expanding the potential for integration into the next-generation optoelectronic devices. This work studies the novel collective optical properties in binary SLs comprising of cubic CsPbBr3 NCs co-assembled with spherical Au nanoparticles (NPs). The study reveals modifications in the absorption and photoluminescence spectra of the binary SLs with reference to the respective single-component CsPbBr3 SLs, attributed to electronic interactions between the nanocrystal excitons and the localized surface plasmons. The dependency of the collective optical properties to the size of the nanocrystal building blocks (5-26 nm) and the perovskite - plasmonic intercomponent distance (2-22 nm) is also presented.
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