Vitali Krukov, Andrei Ramanenka, Anastasia Rotkovich, Olesya Vershinina, Olga Kulakovich
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Thiol ligands engineering for long-term luminescence efficiency of perovskite nanocrystals
Nanocrystals of metal halide perovskites have attracted attention due to their unique luminescent properties, making them promising for optoelectronic applications. However, the stability and emission efficiency of perovskite nanocrystals can decrease depending on the synthesis and storage conditions. To address this challenge, ligand environments around the nanocrystals have been explored. Here we propose using (3-mercaptopropyl)trimethoxysilane as a ligand in the post-synthetic treatment of CsPbBr3 nanocrystals. This treatment has been shown to increase the photoluminescence quantum yield of perovskites as well as their long-term luminescence efficiency. These effects are attributed to stronger interactions of the -SH group with lead compared to the amino group and the formation of bonds between ligand molecules, leading to a more stable ligand shell. The results obtained are useful in the development of perovskite-based LEDs.
期刊介绍：
The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size.
Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology.
The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.
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