A5026973938- Terahertz technology and applications
- Advanced Semiconductor Detectors and Materials
- Semiconductor Quantum Structures and Devices
- Nanowire Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Spectroscopy and Laser Applications
- Electron and X-Ray Spectroscopy Techniques
- Nuclear Physics and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Carbon Nanotubes in Composites
- Photonic and Optical Devices
- Semiconductor materials and interfaces
- Advanced Thermoelectric Materials and Devices
- Fiber-reinforced polymer composites
- Advanced Photocatalysis Techniques
- Nuclear reactor physics and engineering
- Perovskite Materials and Applications
- Advancements in Photolithography Techniques
- Welding Techniques and Residual Stresses
- Advanced X-ray Imaging Techniques
- Topological Materials and Phenomena
- Crystallography and Radiation Phenomena
- 2D Materials and Applications
- Strong Light-Matter Interactions
- Chalcogenide Semiconductor Thin Films
University of Alberta
2020-2024
Moxtek (United States)
2003-2009
We present a potential solution to the problem of extraction photogenerated holes from CdS nanocrystals and nanowires. The nanosheet form C3N5 is low-band-gap (Eg = 2.03 eV), azo-linked graphenic carbon nitride framework formed by polymerization melem hydrazine (MHP). nanosheets were either wrapped around nanorods (NRs) following synthesis pristine chalcogenide or intercalated among them an in situ protocol two kinds heterostructures, CdS-MHP CdS-MHPINS, respectively. improved photocatalytic...
Tin iodide phosphide (SnIP), an inorganic double-helix material, is a quasi-1D van der Waals semiconductor that shows promise in photocatalysis and flexible electronics. However, our understanding of the fundamental photophysics charge transport dynamics this new material limited. Here, we use time-resolved terahertz (THz) spectroscopy to probe transient photoconductivity SnIP nanowire films and, with insight into highly anisotropic electronic structure from quantum chemical calculations,...
We use terahertz time-domain spectroscopy to measure the complex dielectric function of long-wave infrared Hg <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1-x</sub> Cd xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> Te films (x = 0.18, 0.20, 0.22) as a temperature in non-contact manner. Using Drude-Lorentz model fit measured transmission combined with Kane description band structure, we obtain temperature-dependent conduction carrier...
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Mercury cadmium telluride (Hg1−xCdxTe or MCT) is the premier material for infrared detection. However, despite its importance, studies exploring ultrafast photoresponse in this semiconductor alloy are limited. Here, we use time-resolved terahertz spectroscopy to perform a detailed study of picosecond charge carrier dynamics long-wave Hg1−xCdxTe (x ∼ 0.2) films, providing insight into cooling and temperature-dependent scattering mechanisms. Due multilayer photoexcited sample geometry, an...
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Mercury cadmium telluride (MCT) is a well-established semiconductor alloy with widely tunable band gap in the infrared. However, there have been no comprehensive studies on its ultrafast THz photoconductivity dynamics. We report ultra-high carrier mobilities ($6 \times 10^{\mathbf{5}} \mathrm{cm}^{\mathrm{2}}$/Vs) and long lifetimes long-wave infrared MCT films as measured by time-resolved terahertz spectroscopy (TRTS). A crossover to negative at higher frequencies also observed. Our results...
We report on position-dependent measurements of photocarrier transport using time-resolved terahertz spectroscopy (TRTS) across a slot-die printed perovskite film varying morphology. Using the Drude-Smith model for photoconductivity spectra we maximum intrinsic mobilities $540 \pm 20$ ${\mathrm {cm}}^{2} {\mathrm {V}}^{-1} {s}}^{-1}$. In addition, measure variation in extracted and localization c-parameter, correlated with complementary morphology optical properties. To best our knowledge...
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We explore ultrafast photoconductivity dynamics of CdS nanowires wrapped in layers C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> N xmlns:xlink="http://www.w3.org/1999/xlink">5</sub> nanosheets using time-resolved terahertz (THz) spectroscopy. find that nanowire growth, wrapping, and carrier density impact transport these nanowires.