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Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles
Published on: June 25, 2018
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Primitive Ligands Drive 1D CsPbI3 Nanostructures with Strongly Polarized Photoluminescence
Juan Xie1, Kang Feng1, Chuo Yin1
1Colloidal Physics Group, Key Laboratory of Materials Physics, Ministry of Education, School of Physics and Laboratory of Zhongyuan Light, Zhengzhou University, Zhengzhou, 450001, P.R. China.
Angewandte Chemie (International Ed. in English)
|December 31, 2025
Summary
Researchers synthesized diverse CsPbI3 perovskite nanocrystals by adjusting ligand concentrations. This control over morphology and crystal structure opens new avenues for tunable optical properties in advanced materials.
Area of Science:
- Materials Science
- Nanotechnology
- Solid State Chemistry
Background:
- Understanding nucleation and growth kinetics of inorganic lead halide perovskite nanocrystals is crucial for controlling morphology and crystal structure.
- Current synthetic strategies often lack the precision needed for targeted control over these properties.
Purpose of the Study:
- To investigate the influence of primitive ligand concentrations on the synthesis of cesium lead iodide (CsPbI3) perovskite nanocrystals.
- To achieve precise control over the morphology and crystal structure of CsPbI3 perovskites.
- To explore the resulting optical properties and their relationship with structural and morphological characteristics.
Main Methods:
- Modulating concentrations of primitive ligands (iodide ions and oleylamine) in conventional synthetic methods.
- Utilizing density functional theory (DFT) calculations to understand ligand-surface interactions.
- Conducting temperature-dependent photoluminescence studies to analyze electron-phonon coupling.
- Investigating polarization dependence of photoluminescence.
Main Results:
- Achieved diverse CsPbI3 perovskite morphologies, including quantum dots, nanowires/nanorods, and ginkgo leaf-like structures, by tuning ligand concentrations.
- Demonstrated ligand competition for adsorption on specific crystal facets, influencing growth.
- Observed a cubic to orthorhombic phase transition driven by lattice distortion.
- Identified lower electron-phonon coupling in CsPbI3 nanorods compared to ginkgo leaf-like superstructures, leading to reduced non-radiative pathways.
- CsPbI3 nanorods exhibited strong polarization dependence (up to ~0.49).
Conclusions:
- Ligand modulation offers a versatile strategy for controlling CsPbI3 perovskite nanocrystal morphology and crystal structure.
- The findings provide a platform for designing perovskite nanocrystals with tailored optical properties.
- Understanding the interplay between morphology, crystal structure, and optical characteristics is key for future applications.
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