Hydrazine-mediated construction of nanocrystal self-assembly materials. One-pot synthesis of highly luminescent CdTe/CdS core/shell nanocrystals in aqueous phase. Stable aqueous ZnS quantum dots obtained using (3-mercaptopropyl)trimethoxysilane as a capping molecule. Single-dot spectroscopy of zinc-blende CdSe/CdS core/shell nanocrystals: Nonblinking and correlation with ensemble measurements. Efficient quantum dot light-emitting diodes with solution-processable molybdenum oxide as the anode buffer layer. High-efficiency quantum-dot light-emitting devices with enhanced charge injection. Near-white emitting QD-LED based on hydrophilic CdS nanocrystals. Emergence of colloidal quantum-dot light-emitting technologies. Tuning the performance of hybrid organic/inorganic quantum dot light-emitting devices. Semiconductor quantum dots as biological imaging agents. Multiexciton annihilation and dissociation in quantum confined semiconductor nanocrystals. A simple strategy for improving the energy conversion of multilayered CdTe quantum dot-sensitized solar cells. Red-emitting semiconductor quantum dot lasers. Highly efficient, color-pure, color-stable blue quantum dot light-emitting devices. ![]() Tunable electroluminescence properties in CdSe/PVK guest-host based light-emitting devices. Preparation and characterization of Fe 3O 4/CdTe magnetic/fluorescent nanocomposites and their applications in immuno-labeling and fluorescent imaging of cancer cells. ![]() Applications of quantum dots with upconverting luminescence in bioimaging. These results indicate that the proposed aqueous CdTe/CdS core/shell nanocrystals hold great promise for applications requiring efficiency and stability.Ĭhen, Y. A stability study of the QD films in air at various temperatures shows highly improved thermal stability of the shelled QDs (up to 120 ☌ in ambient air). With a systematic set of studies, the maximum PL QY is found to be almost independent of the illuminating UV intensity, while the shell formation kinetics required for reaching the maximum QY linearly depends on the illuminating UV intensity. This controlled colloidal hetero-epitaxy leads to a substantial increase in the photoluminescence (PL) quantum yield (QY) of the shelled nanocrystals in water (reaching 64%). The resulting photo-induced dissociation of S 2O 2− 3 ions conveniently triggers the formation of critical two-dimensional CdS epitaxy on the CdTe surface at room temperature, as opposed to initiating the growth of individual CdS core-only nanocrystals. We report high-efficiency CdTe/CdS core/shell nanocrystals synthesized in water by epitaxially growing CdS shells on aqueous CdTe cores at room temperature, enabled by the controlled release of S species under low-intensity ultraviolet (UV) light illumination.
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