Thermodynamic Silver Doping of Core/Shell Colloidal Quantum Wells Imparted with Paramagnetic Properties Emitting at Near-Infrared
نویسندگان
چکیده
Two-dimensional (2D) core/shell nanoplatelets (NPLs) synthesized via the hot-injection method provide excellent thermal and chemical stability for high-temperature doping, where an expanded flexible lattice is required. Here, a thermodynamic approach toward silver doping of these NPLs proposed demonstrated, which previously proved to be challenging due fast self-purification dopants with introduction shell. Maintaining procedure in reversible regime ensured integrity allowed high level doping; however, equilibrium condition further complicated by environmental factors that affect activity cations surface composition NPLs. Two main deterioration mechanisms irreversible were observed: ZnS-shelled suffered preferential etching, while CdS-shelled underwent cleavage fragmentation. Alloying shell minimized both CdZnS-shelled preserved metastable state NPLs, including their 2D shape crystalline structure. Distribution ions directly affected recombination dynamics enabled fine-tuning near-infrared emission beside exciton confinement. These silver-doped are shown exhibit enhanced paramagnetic properties Zeeman splitting Brillouin-like bound-exciton polarization as function magnetic field, critical spintronic applications.
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ژورنال
عنوان ژورنال: Chemistry of Materials
سال: 2023
ISSN: ['1520-5002', '0897-4756']
DOI: https://doi.org/10.1021/acs.chemmater.3c00058