A5018841237- Semiconductor Quantum Structures and Devices
- Quantum and electron transport phenomena
- Spectroscopy and Laser Applications
- GaN-based semiconductor devices and materials
- Quantum Dots Synthesis And Properties
- Terahertz technology and applications
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- 2D Materials and Applications
- ZnO doping and properties
- Graphene research and applications
- Silicon Nanostructures and Photoluminescence
- Advanced Semiconductor Detectors and Materials
- Surface and Thin Film Phenomena
- Acoustic Wave Resonator Technologies
- Chalcogenide Semiconductor Thin Films
- MXene and MAX Phase Materials
- Carbon and Quantum Dots Applications
- Transition Metal Oxide Nanomaterials
- Luminescence and Fluorescent Materials
- Laser-Matter Interactions and Applications
- Solid-state spectroscopy and crystallography
- COVID-19 epidemiological studies
- Nonlinear Optical Materials Research
- Copper-based nanomaterials and applications
University of Tarapacá
2019-2025
Universidad Bernardo O'Higgins
2022
Catholic University of the Maule
2022
Universidad Autónoma del Estado de Morelos
2017-2019
Universidad de Antioquia
2014-2018
Donbass State Engineering Academy
2014-2016
Abstract We have theoretically investigated the electronic states in a core/shell pyramidal quantum dot with GaAs core embedded AlGaAs matrix. This system has quite similar recent experimental realization through cone/shell structure [Phys. Status Solidi-RRL 13, 1800245 (2018)]. The research been performed within effective mass approximation taking into account position-dependent masses and presence of external electric magnetic fields. For numerical solution resulting three-dimensional...
Cu2ZnSn(S,Se)4 (CZT(S,Se)) thin films exhibit the characteristics necessary to be effective absorbers in solar cells. In this report, room temperature experimental Raman scattering spectra, recorded at different excitation wavelengths, are systematically analyzed theoretically using results of DFT harmonic frequencies calculations Γ-point for various modifications kesterite (KS), stannite (ST), and pre-mixed Cu-Au (PMCA) crystal structures. The specific anharmonism‐induced features spectra...
In recent years, two‐dimensional (2D) materials with unique mechanical, optical, and electrical properties have attracted extensive attention. terms of mechanical properties, 2D molybdenum disulfide (MoS 2 ) can perform larger strains than traditional semiconductor materials. this contribution, the chemical vapor deposition technique to grow MoS films on a Si wafer transfer them onto flexible substrate is used. The controlled deformation samples realized by encapsulating acrylate film via...
Following the chronological stages of calculations imposed by WIEN2K code, we have performed a series density functional theory calculations, from which were able to study effect strain on kesterite structures for two quaternary semiconductor compounds Cu2ZnGeS4 and Cu2ZnGeSe4. Remarkable changes found in electronic optical properties these materials during application biaxial strain. Indeed, band gap energy both decreases equilibrium state, applied is more pronounced. The main features are...
Abstract The article provides and discusses details of numerical proceeding for the expansion method to calculate energy positions wave functions localized resonant electronic states emerging in quantum well-type semiconductor nanostructures because perturbation confined by Coulomb potential hydrogenic impurity center. Effective mass approximation is used. Several excited both non-resonant are calculated classified case a simple rectangular GaAs/AlGaAs well. Results compared ones literature.
Boronate esters are a class of compounds containing boron atom bonded to two oxygen atoms in an ester group, often being used as precursors the synthesis other materials. The characterization structure and properties is usually carried out by UV-visible, infrared, nuclear magnetic resonance (NMR) spectroscopic techniques. With aim better understand our experimental data, this article, density functional theory (DFT) analyze UV-visible infrared spectra, well isotropic shielding chemical...
Abstract In this study, an analysis of the Chilean public health response to mitigate spread COVID-19 is presented. The based on daily transmission rate (DTR). has been dynamic quarantines, which are established, lifted or prolonged percentage infected individuals in fundamental administrative sections, called communes. This performed at a national level, level Metropolitan Region (MR) and commune MR according whether did not enter quarantine between late March mid-May 2020. shows certain...
A theoretical investigation on electronic states in triangular MoS 2 quantum dots of different sizes is performed within density functional theory first‐principles formalism. Herein, the associated interband optical response from real and imaginary parts dielectric function calculated. The study considers both undoped Al‐, Si‐, P‐doped systems. Spin‐related magnetic properties are considered through evaluation total moment. It revealed that small enough structures have a semiconductor...
This theoretical study is devoted to the effects of pressure and temperature on optoelectronic properties assigned first lowest transition (D+,X) excitonic complex (exciton-ionized donor) inside a single AlAs/GaAs/AlAs spherical quantum dot. Calculations are performed within effective mass approximation theory using variational method. Optical absorption refractive index as function degree confinement, pressure, investigated. Numerical calculation shows that favors electron-hole...
<title>Abstract</title> The energy positions and wave function shapes of ground excited impurity states including resonant ones are studied using expansion method. structures under study GaAs/AlGaAs rectangular quantum wells with four different widths. In all cases binding (with respect to related subband) has a maximum at or near the center well, decreases when approaching barrier seemingly limit 0 if moves away from well. If is displaced well center, then non-resonant functions within move...