A5050990141- Organic Electronics and Photovoltaics
- Thin-Film Transistor Technologies
- Conducting polymers and applications
- Optical Coatings and Gratings
- Photonic Crystals and Applications
- Photonic and Optical Devices
- ZnO doping and properties
- Silicon and Solar Cell Technologies
- Chalcogenide Semiconductor Thin Films
- Plasmonic and Surface Plasmon Research
- Gold and Silver Nanoparticles Synthesis and Applications
- Copper-based nanomaterials and applications
- Near-Field Optical Microscopy
- Semiconductor materials and interfaces
- Quantum Dots Synthesis And Properties
- solar cell performance optimization
- Silicon Nanostructures and Photoluminescence
- Nanowire Synthesis and Applications
- Nonlinear Optical Materials Studies
- Calibration and Measurement Techniques
- Semiconductor Lasers and Optical Devices
- Optical and Acousto-Optic Technologies
- Adaptive optics and wavefront sensing
- Advanced X-ray Imaging Techniques
- Surface Roughness and Optical Measurements
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence
2012-2021
Aix-Marseille Université
2011-2021
Centre National de la Recherche Scientifique
2011-2021
Ahmed Draia University
2018
Institut Fresnel
2003-2018
Opto Eletrônica (Brazil)
2009-2017
Cegep de Saint Jerome
2016
Délégation Provence et Corse
2016
Université de Toulon
2011-2013
Architecture, Territoire, Environnement
2008
Tetrahedral nanopyramids made of silver and gold over ITO/glass surfaces are fabricated. Our protocol is based on nanosphere lithography (NSL) with the deposition thicker metal layers. After removing microspheres used in NSL process, an array metallic tetrahedral nanostructures ∼350–400 nm height formed. The reported procedure avoids use any stabilizing surfactant molecules that generally necessary to segregate individual particles onto surfaces. We focus here optical physical properties...
This paper deals with the improvement of “light harvesting” in photovoltaic cells by using photonic nanostructures. We theoretically study a poly-3-hexylthiophene/[6,6]-phenyl-C61-butyric acid methyl ester (P3HT/PCBM) thin film periodically nanostructured order to increase its absorption. The periodic nanostructuration allows “slow Bloch modes” (group velocity close zero) be coupled inside material. P3HT/PCBM crystal parameters are adjusted maximize density modes and obtain flat dispersion...
The electrical and optical properties of MoO3/Ag/MoO3 multilayer structures have been studied using the Ag deposition rate layer thicknesses as parameters. When silver film is deposited at 0.20 nm/s rate, thickness necessary to achieve percolation threshold resistivity ρ towards conductive 10 nm. Below nm, films are semiconductor above conductors. In present work, variation top bottom MoO3 layers shown strongly modify structures. By a we demonstrate an increasing transmittance by optimizing...
High-reflectivity dense multilayer coatings were produced for the ultraviolet spectral region. Thin-film single layers and UV mirrors deposited by ion plating plasma ion-assisted deposition high-energetic technologies. Optical characterizations of HfO2 SiO2 are made. The optical constants obtained these two materials presented. with a reflectance approximately 99% near 250 nm reported.
We present a theoretical and experimental study of simple layer-by-layer photonic crystal structure designed for the control thermal emission in infrared wavelength domain. show that relatively made alternated ZnSe homogenous layers gold microstructured grids can act as source itself giving us unique opportunity to tailor its spectra. Comparisons between computed measured transmission emissivity spectra illustrate relevance our approach.
Large arrays of sub-micrometre blind holes and with a filling ratio up to 60% on areas millimetre square are realized silicon. The structuration ensues from combining both Langmuir–Blodgett deposition technique ultraviolet nanosecond laser-assisted photonic nanojet ablation through C18 functionalized silica microspheres. Different laser fluence ranges numbers shots studied understand the tradeoff between size, quality craters surface morphology after irradiation. In particular, tuning...
We have investigated the influence of poly(3,4-ethylenedioxythiophene)-blend-poly(styrene-sulfonate) (PEDOT:PSS) layer on short-circuit current density (Jsc) single planar heterojunction organic solar cells based a copper phthalocyanine (CuPc)-buckminsterfullerene (C60) active layer. Complete optical and electrical modeling cell has been performed taking into account interferences exciton diffusion. Comparison experimental simulated external quantum efficiency allowed us to estimate...
This paper aims at modeling bi-periodic micro-structured silicon surfaces exhibiting broadband antireflection properties in the infrared range using Rigorous Coupled-Wave Analysis (RCWA). These structures of pyramidal shape, which typical dimensions are smaller than wavelength, not Effective Medium Theory (EMT) validity domain. The influence various opto-geometrical parameters such as period, depth, shape pattern is examined. antireflective patterned then discussed photonic crystal theory...
Optimization of metal-based transparent conductors (MTCs) made silver and aluminium-doped zinc oxide (AZO) prepared by radio-frequency (r.f.) sputtering has been carried out through tuning metal film properties. The influence morphology related plasmonic features AZO/Ag/AZO MTCs on their optical electrical performance is demonstrated it shown that the nominal thickness layer itself not most crucial value determining MTC performance. optimized a search deposition conditions ensuring...
The workfunction of dielectric|metal|dielectric transparent and conductive electrodes, promising candidates for replacing ITO in thin film solar cells, is measured by Kelvin probe force microscopy (KPFM). Measurement on commercial gives a 4.74 eV, which agreement with the values reported literature. Measurements are then performed optically optimised multilayer electrodes fabricated glass e-beam evaporation, using three different dielectrics. For TiO2(37 nm)|Ag(13 nm)|TiO2(42 nm), SnOx(45...
Undoped and Ba‐doped ZnO nanoparticles were successfully synthesized using microwave hydrothermal method. The influence of Barium concentration on physical optical properties was investigated. X‐Ray Diffraction (XRD) analysis revealed that the are polycrystalline with hexagonal wurtzite crystal structure their average crystallite sizes found to vary from 20 21.5 nm in diameter. SEM images showed surface morphology samples influenced by presence Ba impurities. Ultraviolet green emission bands...
A quasi-continuous ultrathin silver film allows obtaining broadband ZnS/Ag/TiO<sub>2</sub> transparent conductive electrodes.
A SnOx | Ag multilayer deposited by E-beam evaporation is proposed as transparent anode for a (poly-3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM) bulk heterojunction based Organic Solar Cell (OSC). Such multilayers are studied and manufactured with the objective to give electrode its best conductivity transparency in visible spectral range. transfer matrix method numerical optimization of thicknesses each layer developed limit number test samples which would have...
Molecular blends of pentacene: N, N′-ditridecylperylene-3, 4, 9, 10-tetracarboxylic diimide (PTCDI-C13H27) permit to cover the visible part solar spectrum with an absorption onset at 730nm. Although charge mobilities pentacene and PTCDI are rather large, efficiency pentacene:PTCDI-C13H27 blended devices is still lower than that poly(3-hexylthiophene):[6,6]-phenyl C61-butyric acid methyl ester devices. Comparisons between experimental results optical modeling indicate more 30% photocurrent...