Física Aplicada: Envíos recientes
Mostrando ítems 201-220 de 556
Anomalous crystallization of hydrogenated amorphous silicon during fast heating ramps
Thermal crystallization experiments carried out using calorimetry on several a-Si:H materials with different microstructures are reported. The samples were crystallized during heating ramps at constant heating rates up to ...
Multiple Characteristics of Precipitation Inferred from Wind Profiler Radar Doppler Spectra
A methodology to process radar wind profiler Doppler spectra is presented and implemented for an UHF Degreane PCL1300 system. First, double peak signal detection is conducted at each height level and, then, vertical ...
Design strategies for optimizing holographic optical tweezers set-ups
We provide a detailed account of the construction of a system of holographic optical tweezers. While a lot of information is available on the design, alignment and calibration of other optical trapping configurations, those ...
Analysis of the role of mobility-lifetime products in the performance of amorphous silicon p-i-n solar cells
An analytical model of an amorphous silicon p-i-n solar cell is presented to describe its photovoltaic behavior under short-circuit conditions. It has been developed from the analysis of numerical simulation results. These ...
Polymeric interlayer in CdS-free Electron-Selective Contact for Sb2Se3 thin-film solar cells
High open-circuit voltage in Sb2Se3 thin-film solar cells is a key challenge in the development of earth-abundant photovoltaic devices. CdS selective layers have been used as the standard electron contact in this technology. ...
Adding functionalities to precomputed holograms with random mask multiplexing in holographic optical tweezers
In this study, we present a method designed to generate dynamic holograms in holographic optical tweezers. The approach combines our random mask encoding method with iterative high-efficiency algorithms. This hybrid method ...
Seasonal prediction of climate-driven fire risk for decision-making and operational applications in a Mediterranean Region
In this paper, we assess and develop a climate service focused on the production of seasonal predictions for summer wildfires in a Mediterranean region through a participatory approach with end-users. We start by building ...
Effect of substrate temperature on deposition rate of rf plasma-deposited hydrogenated amorphous silicon thin films
We present a study about the influence of substrate temperature on deposition rate of hydrogenated amorphous silicon thin films prepared by rf glow discharge decomposition of pure silane gas in a capacitively coupled plasma ...
Tribological Properties of Fluorinated Amorphous Carbon Thin Films
The peculiar electronic configuration of carbon atoms, 1s2 2s2 2p2, and the small energy difference between their 2p and 2s orbitals, compared to the binding energy of the carbon bonds, allow the electrons to rearrange ...
Three-dimensional polarimetric integral imaging in photon-starved conditions: performance comparison between visible and long wave infrared imaging
Three-dimensional (3D) polarimetric integral imaging (InIm) to extract the 3D polarimetric information of objects in photon-starved conditions is investigated using a low noise visible range camera and a long wave infrared ...
Light-activated electroforming in ITO/ZnO/p-Si resistive switching devices
We report on light-activated electroforming of ZnO/p-Si heterojunction memristors with transparent indium tin oxide as the top electrode. Light-generated electron-hole pairs in the p-type substrate are separated by the ...
Homogeneous Fe2O3 coatings on carbon nanotube structures for supercapacitors
The combination of carbon nanotubes with transition metal oxides can exhibit complementary charge storage properties for use as electrode materials for next generation energy storage devices. One of the biggest challenges ...
Artifact-free holographic light shaping through moving acousto-optic holograms
Holographic light modulation is the most efcient method to shape laser light into well-defned patterns and is therefore the means of choice for many intensity demanding applications. During the last two decades, spatial ...
Bayesian trend analysis for daily rainfall series of Barcelona
A Point-Over-Threshold approach using a reparameterization of the Generalized Pareto Distribution (GPD) has been used to assess changes in the daily rainfall Barcelona series (1854-2006). A Bayesian approach, considering ...
Mapping Flood-Related Mortality in the Mediterranean Basin. Results from the MEFF v2.0 DB
Recent events in Western Attica in Greece (24 deaths in November 2017), in the Balearic Islands (13 deaths in October 2018), and in southern France (15 deaths in October 2018) show that flood-related mortality remains a ...
Infrared characterization of a-Si:H/a-Si1-xCx:H interfaces
Infrared spectroscopy was used to characterize three series of a-Si:H/a-Si1-xCx:H multilayers in which their geometrical parameters were varied. The infrared active vibrational groups in their spectra and the interference ...
Optical Encryption using Photon-Counting Polarimetric Imaging
We present a polarimetric-based optical encoder for image encryption and verification. A system for generating random polarized vector keys based on a Mach-Zehnder configuration combined with translucent liquid crystal ...
Thermally-Induced Structural Transformations on Polymorphous Silicon
Polymorphous Si is a nanostructured form of hydrogenated amorphous Si that contains a small fraction of Si nanocrystals or clusters. Its thermally induced transformations such as relaxation, dehydrogenation, and crystallization ...
Development of laser-fired contacts for amorphous silicon layers obtained by Hot-Wire CVD
In this work we study aluminium laser-fired contacts for intrinsic amorphous silicon layers deposited by Hot-Wire CVD. This structure could be used as an alternative low temperature back contact for rear passivated ...
In situ spectroellipsometric study of the nucleation and growth of amorphous silicon
A detailed in situ spectroellipsometric analysis of the nucleation and growth of hydrogenated amorphous silicon (a:Si:H) is presented. Photoelectronic quality a‐Si:H films are deposited by plasma‐enhanced chemical vapor ...
