Susana Fernandez de Avila

Susana Fernandez de Avila
Universidad Miguel Hernández de Elche | UMH · Department of Communications Engineering

About

42
Publications
4,350
Reads
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294
Citations
Citations since 2016
16 Research Items
128 Citations
2016201720182019202020212022051015202530
2016201720182019202020212022051015202530
2016201720182019202020212022051015202530
2016201720182019202020212022051015202530
Additional affiliations
January 2011 - May 2016
Universidad Miguel Hernández de Elche
Position
  • Head of Department
January 2011 - May 2016
Universidad Miguel Hernández de Elche
Position
  • Head of Department
January 2002 - present
Universidad Miguel Hernández de Elche

Publications

Publications (42)
Article
Full-text available
Beyond 5G networks, and for short distance but high-speed communication systems, there is an incipient growing interest in visible light communications (VLC). Furthermore, it is an interesting alternative within the framework of the Internet of Things (IoT). However, there is a problem on the part of the receiver in these systems, motivated by the...
Article
Full-text available
In Visible Light Communication (VLC) Systems, data are transmitted by modulating light from an illumination source, that could be an ordinary lamp or light-emitting diodes (LEDs). Photovoltaic cells based on massive heterojunctions of semiconductor polymers have focused the attention of researchers due to several potential advantages over their ino...
Article
Full-text available
In this study, poly(9-vinylcarbazole) (PVK)-based LEDs doped with reduced graphene oxide (rGO) and cadmium sulphide (CdS) nanocrystals were fabricated by spin-coating. The hybrid LED structure was a layer sequence of glass/indium tin oxide (ITO)/PEDOT:PSS|rGO/PVK/Al. rGO was included in the poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (P...
Chapter
Nowadays general learning programs in Bachelor’s degrees in engineering have gradually adapted towards the inclusion of more electronics oriented subjects. The prominent growth of technology applications reveals its influence on the design of such education plans at university. Most of them introduce advanced methodologies, which in most cases, are...
Article
Full-text available
In this paper, we compare four different methods to estimate nanoparticle diameters from optical absorption measurements, using transmission electron microscopy (TEM) images as a reference for the nanoparticle size. Three solutions of colloidal nanoparticles coated with thiophenol with different diameters were synthesized by thiolate decomposition....
Article
Full-text available
In this article, we compare two different kinds of commercial light-emitting diodes (LEDs) in transmission and organic photodetectors based on poly(3-hexylthiophene) (P3HT) and a phenyl-C61-butyric acid methyl ester (PCBM) blend used as active layer in reception. Photovoltaic cells based on massive heterojunctions of semiconductor polymers have foc...
Article
Full-text available
Immiscibility between dimethyl sulfoxide (DMSO) and polar solvents used for poly(N-vinylcarbazole) (PVK) solutions, leads to failed light-emitting diodes when colloidal cadmium sulfide (CdS) nanoparticles capped with thiophenol are incorporated to their active layer. To prevent this, a heat treatment is applied to the CdS nanoparticles in order to...
Article
Full-text available
Over the past few decades, the incipient growth of technology applications sustained by electronics has contributed to the adaption of learning programs in many engineering degrees at university, fostering the presence of electronics subjects. This highlights the paramount importance of improving the teaching of electronics, especially in the first...
Article
Full-text available
Lead sulfide nanoparticles (PbS NPs) have been synthesized directly in poly[2-methoxy-5-(3 í®í° ,7 í®í° -dimethyloctyloxy)-1,4-phenylenevinylene] (MDMO-PPV) semiconducting polymer by a simple low temperature method. Hybrid solutions with different concentrations of PbS with respect to the polymer have been prepared and characterized first in soluti...
Conference Paper
We present a simple technique for selective deposition of a periodic electrode in one kind of up or down ferroelectric domains alone in a periodically poled lithium niobate crystal for electro-optic control of second harmonic generation.
Article
Full-text available
This paper presents the electrical characteristics of solution-processed organic photodetectors based on poly(3-hexylthiophene-2,5-diyl) semiconducting polymer layers deposited by spin-coating on interdigitated metal electrodes. Four different electrode shapes have been used for this study in order to appraise the optimum electrode geometry. The me...
Article
Polymeric light emitting diodes with active layer cast from different mixtures of solvents have been fabricated. Poly(9-vinylcarbazole) has been used as a reliable emissive polymer. Mixtures of toluene and tetrahydrofuran solvents in several proportions are used to process it. A lower turn-on voltage has been found for devices in which the active l...
Article
We report on a simple chemical route to directly synthesize PbS nanocrystals capped with 4-fluorothiophenol in poly[2-methoxy-5-(3',7'-dimethyloctyloxy)-1,4-phenylenevinylene] semiconducting polymer. An intermediate composite, which has been characterized by X-ray photoelectron spectroscopy, has been synthesized to be used as nanocrystal precursor...
Article
Full-text available
Quantum dots of cadmium sulfide have been synthesized in a series of aqueous solutions of two stabilizers: a fixed concentration of polyvinyl alcohol polymer with a variable amount of sodium polyphosphate. Optical absorption and photoluminescence measurements have been performed in order to assess the optical properties of the colloidal solutions....
Article
Nanocrystals of cadmium sulfide have been synthesized in a series of aqueous solutions with a fixed concentration of polyvinyl alcohol and a variable amount of sodium polyphosphate. Optical absorption and photoluminescence measurements have been performed in order to determine the optical properties of the colloidal solutions. Transmission electron...
Article
An experimental study about the influence of the thickness of electrochemically deposited polyaniline (PANI), used as hole-transporting layer, on the behaviour of polymer light emitting diodes is presented. Two sets of devices with a different conjugated polymer used as active layer were prepared. Poly(9-vinylcarbazole) was used for the first type...
Article
We report on a simple method to synthesize PbS quantum dots directly in poly[2-methoxy-5-(3',7'dimethyloctyloxy)-1,4-phenylenevinylene] conducting polymer. Optical absorption, photoluminescence and transmission electron microscopy measurements have been performed in order to characterize the colloidal suspension with different proportions of PbS na...
Article
Full-text available
Polymeric light emitting diodes based on Poly(9-vinylcarbazole) have been fabricated. Electrochemically deposited polyani-line (PANI) films of several thicknesses have been used onto the ITO-covered glass substrates as buffer layers. An experi-mental study about the dependence of the Electroluminescence on the excitation voltage of these devices wi...
Article
Full-text available
Polymeric light emitting diodes (PLEDs) as potential light detector devices, have been studied. Two different polymers: one commercially available Poly(9,9-dihexiffluorene) (PFC6) and other one -synthesized specially for optoelectronic applications-Poly(9,9-bis(6 -brominehexil)-fluorene phenylene) (PFBr2), have been used as active layer for the dio...
Article
Multilayer structures of alternating polymers, poly(9-vinylcarbazole) and poly(vinyl alcohol), with reflectance peaks centered in the range 500-610nm, have been deposited on silica glass substrates by spin-coating. The dependence of their reflectance, transmittance and absorbance on the incident wavelength have been characterized by spectrophotomet...
Article
Full-text available
Multilayer structures of two commercial polymers, poly(9-vinylcarbazole) and poly(vinyl alcohol), have been deposited on silica glass substrates by spin-coating. A study of the transmittance of single layers provides a determination of the refractive index and absorption coefficient dispersion curves for those materials, in the range 400–1100 nm. T...
Article
Full-text available
Amplified spontaneous emission (ASE) in optically pumped polymeric films containing the luminescent and hole-transporting organic molecule N,N<sup>′</sup>-Bis(3-methylphenyl)-N,N<sup>′</sup>diphenylbenzidine (TPD) is demonstrated. ASE is observed in polymer films of polystyrene and poly(N-vinylcarbazole) doped up to 20% with TPD. From these results...
Article
The drain current in a pseudomorphic heterostructure FET (P-HFET) has a negative temperature dependence which is correctly predicted when the electron transport through the barriers is taken into account. In order to compare simulation with experimental results, the static output characteristics on a long gate P-HFET have been measured over the tem...
Article
Nonparaxial diffraction-limited propagation of light with amplitude distribution in hyperbolic functions through an inhomogeneous planar medium with a hyperbolic secant refractive-index profile is studied by means of the stationary phase method. The irradiance distribution at geometrical shadow, edge of shadow, and a geometrically illuminated regio...
Article
A study of non-paraxial diffraction-free propagation of light with transverse amplitude in sech through a planar waveguide with hyperbolic secant refractive profile is presented. Analytical solution by the stationary phase method is obtained. A particular case is analysed.
Article
The effective mass in the two-dimensional electron gas of a delta-doped InxGa1−xAs HEMT structure from the variation of the amplitude of the Shubnikov–de Haas oscillations was determined; with the temperature from measurements obtained as a function of the magnetic field and the gate voltage. The effective mass shows at intermediate magnetic fields...
Article
Deep levels have been characterized in Si-doped and undoped InAlAs layers lattice matched to InP. At ambient pressure and low temperature, the Schottky junction capacitance shows a small persistent photocapacitance effect, related to photoionization thresholds at 0.6 and 1.1 eV. Deep-level transient spectroscopy spectra show a dominant, low-density...
Article
We measured the diagonal component of the transverse magnetoresistance in two pseudomorphic InxGa1−xAs HEMT structures. The quantum lifetime is obtained from the variation of the amplitude of the Shubnikov–de Hass oscillations with the magnetic field, from Landau levels index between 22 and 5, using a modified Dingle plot method which takes into ac...
Article
We obtained the non-classical term of the Hall magnetoconductivity combining experimental measurements of both components of the transverse magnetoresistance with a model based on the Streda equation. σxy appears as the addition of two oscillatory terms. The first one related to σxx gives the contribution of the 2D bulk electrons. The other one obt...
Article
Local vibrational modes (LVM) of Si in substitutional sites have been observed by resonant Raman spectroscopy in highly doped (≥8×1018 cm−3) InxGa1−xAs layers, either relaxed or under strain, on [100] GaAs substrates. The peak frequency ωLVM of the Si on Ga site (SiGa) LVM in unstrained samples shifts to lower values with increasing In content. For...
Article
Thickness effects of the InGaAs channel on photoluminescence and transport properties of δ‐doped Al 0.3 Ga 0.7 As/In 0.3 Ga 0.7 As heterostructures are investigated. The spreading of the Si δ‐doping layer is deduced from a comparison of the measured charge with self‐consistent calculations assuming a Gaussian Si distribution profile and a definite...
Article
Full-text available
This paper describes an application, based on a FPGA (Field Programmable Gate Array), that computes stereo correspondence on a pair of images coming from a stereo rig. In this work, stereo vision is used as a way to provide a mobile robot with depth information of its surroundings. The algorithm implemented first extracts significant points in the...

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