A5063774606- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Optical properties and cooling technologies in crystalline materials
- Luminescence Properties of Advanced Materials
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced biosensing and bioanalysis techniques
- Scientific Measurement and Uncertainty Evaluation
- Near-Field Optical Microscopy
- Nanowire Synthesis and Applications
- Advanced Photocatalysis Techniques
- Laser Design and Applications
- Planetary Science and Exploration
- Nuclear Physics and Applications
- High-pressure geophysics and materials
University of Colorado Boulder
2024-2025
University of Colorado System
2024-2025
Oak Ridge National Laboratory
1996
Photoluminescence intermittency remains one of the biggest challenges in realizing perovskite quantum dots (QDs) as scalable single photon emitters. We compare CsPbBr3 QDs capped with different ligands, lecithin, and a combination oleic acid oleylamine, to elucidate role surface chemistry on photoluminescence intermittency. employ widefield microscopy sample blinking behavior hundreds QDs. Using change point analysis, we achieve robust classification trajectories, analyze representative...
Single-photon sources are essential for advancing quantum technologies with scalable integration being a crucial requirement. To date, deterministic positioning of single-photon in large-scale photonic structures remains challenge. In this context, colloidal dots (QDs), particularly core/shell configurations, attractive due to their solution processability. However, traditional QDs typically small, about 3 6 nm, which restricts placement and utility devices, within optical cavities. The...
Anchoring of molecules to the surfaces semiconductor nanocrystals (NCs) presents an opportunity leverage precise synthetic tunability molecular function and remarkable light harvesting properties NCs drive photochemical reactions. However, charge transfer between two species depends not only on energy level alignments but also details their binding interactions, which are difficult probe. Here, we characterize CdSe quantum dots (QDs) a new phosphonated derivative electron acceptor methyl...
The morphology of quantum dots plays an important role in governing their photophysics. Here, we explore the photoluminescence spheroidal CsPbBr3 synthesized via room-temperature trioctylphosphine oxide/PbBr2 method. Despite yields nearing 100%, these exhibit elongated red tail not observed typical cubic hot injection. We origins this through structural and optical characterization including small-angle X-ray scattering, transmission electron microscopy time-resolved, steady-state, single...
Colloidal quantum dots, with their size-tunable optoelectronic properties and scalable synthesis, enable applications in which inexpensive high-performance semiconductors are needed. Synthesis science breakthroughs have been key to the realization of dot technologies, but important group III–group V semiconductors, including colloidal gallium arsenide (GaAs), still cannot be synthesized existing approaches. The high-temperature molten salt synthesis introduced this work enables preparation...
Single-photon sources are essential for advancing quantum technologies, with scalable integration being a crucial requirement. To date, deterministic positioning of single-photon in large-scale photonic structures remains challenge. In this context, colloidal dots (QDs), particularly core/shell configurations, attractive due to their solution processability. However, traditional QDs typically small, about 3 6 nm, which restricts placement and utility devices. The largest existing the family...
Aluminum nanocrystals created by catalyst-driven colloidal synthesis support excellent plasmonic properties, due to their high level of elemental purity, monocrystallinity, and controlled size shape. Reduction in the rate nanocrystal growth enables highly anisotropic Al nanowires, nanobars, singly twinned "nanomoustaches". Electron energy loss spectroscopy was used study properties these nanocrystals, spanning broad range needed map modes. The coupling between other metal nanostructures,...
The morphology of quantum dots plays an important role in governing their photophysics. Here, we explore the photoluminescence spheroidal CsPbBr3 synthesized via room-temperature trioctlyphosphine oxide/PbBr2 method. Despite yields nearing 100%, these exhibit elongated red tail not observed typical cubic hot injection. We this through structural and optical characterization including small-angle x-ray scattering, transmission electron microscopy time-resolved, steady-state, single dot...