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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Horwat, David
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (34/34 displayed)
- 2024Influence of chemistry and topography on the wettability of copper
- 2024Rapid ellipsometric imaging characterization of alloy and nanocomposite films with an articificial neural network
- 2024High quality ZnMgAlO thin films by ultrasonic spray pyrolysis: tuning of optoelectronic properties for use as TCO, window layer, and buffer layer in all-oxide solar cellscitations
- 2024ZnMgO Thin Films by Ultrasonic Spray Pyrolysis: Modulation of Optical and Electrical Properties by Post‐annealing and Magnesium Compositioncitations
- 2023Nanostructured Zr-Cu metallic glass thin films with tailored electrical and optical propertiescitations
- 2023Development of a two-step process based on ultrasonic spray pyrolysis to optimize optical and electrical properties of ZnMgAlO
- 2022Tuning the photoluminescence spectral properties of Ce and Sm co-doped YAG ceramic for optical applicationscitations
- 2022Rapid ellipsometric determination and mapping of alloy stoichiometry with a neural networkcitations
- 2022One-Step Formation of Plasmonic Cu Nanodomains in p-Type Cu 2 O Matrix Films for Enhanced Photoconversion of n-ZnO/p-Cu 2 O Heterojunctionscitations
- 2021Influence of magnesium doping on microstructure, optical and photocatalytic activity of zinc oxide thin films synthesis by sol–gel routecitations
- 2021Composition-driven transition from amorphous to crystalline films enables bottom-up design of functional surfacescitations
- 2021Blue emission and twin structure of p-type copper iodide thin filmscitations
- 2021Growth kinetics and origin of residual stress of two-phase crystalline-amorphous nanostructured filmscitations
- 2021Effect of the precursor concentration on structural properties of ZnO thin films by ultrasonic spray pyrolysis
- 2021Elaboration of high-transparency ZnO thin films by ultrasonic spray pyrolysis with fast growth ratecitations
- 2019Ultraviolet to infrared downshifting in Ce and Yb co-doped aluminum oxynitride thin films
- 2019Optimization of the performances of textured segmented solar cells: achievements and challenges
- 2018Local structure and point defects-dependent Area-Selective Atomic Layer Deposition Approach for Facile Synthesis of p-Cu₂O/n-ZnO Segmented Nano-junctionscitations
- 2018Ultraviolet optical excitation of near infrared emission of Yb-doped crystalline aluminum oxynitride thin filmscitations
- 2018Local Structure and Point-Defect-Dependent Area-Selective Atomic Layer Deposition Approach for Facile Synthesis of p-Cu2O/n-ZnO Segmented Nanojunctionscitations
- 2018From Blue to White luminescence in Cerium-doped Aluminum Oxynitride: Electronic Structure and Local Chemistry Perspectivescitations
- 2018Local structure and point defects-dependent Area-Selective Atomic Layer Deposition Approach for Facile Synthesis of p-Cu 2 O/n-ZnO Segmented Nano-junctionscitations
- 2017Controlling refractive index in AlN films by texture and crystallinity manipulationcitations
- 2017Bacterial adhesion on biomedical surfaces covered by yttria stabilized zirconiacitations
- 2017Strong room-temperature blue emission from rapid-thermal annealed cerium-doped aluminum (oxy)nitride thin filmscitations
- 2016Local Structure-Driven Localized Surface Plasmon Absorption and Enhanced Photoluminescence in ZnO-Au Thin Filmscitations
- 2016Bacterial adhesion on biomedical surfaces covered by yttria stabilized zirconiacitations
- 2015Tuning the structure and preferred orientation in reactively sputtered copper oxide thin filmscitations
- 2014Probing temperature-induced ordering in supersaturated Ti-1 (-) xAlxN coatings by electronic structurecitations
- 2014Transmittance enhancement and optical band gap widening of Cu2O thin films after air annealingcitations
- 2014Controlling the preferred orientation in sputter-deposited Cu2O thin films: Influence of the initial growth stage and homoepitaxial growth mechanismcitations
- 2014Electrochemical activation of Au nanoparticles for the selective partial oxidation of methanolcitations
- 2014Local modification of the microstructure and electrical properties of multifunctional Au-YSZ nanocomposite thin films by laser interference patterningcitations
- 2012Influence of laser interference patterning on microstructure and friction behavior of gold/yttria-stabilized zirconia nanocomposite thin filmscitations
Places of action
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document
Development of a two-step process based on ultrasonic spray pyrolysis to optimize optical and electrical properties of ZnMgAlO
Abstract
Metal-oxide materials based on Earth-abundant elements such as Zn, Mg and Al are crucial for next-generation materials of optoelectronic devices. For instance, the co-incorporation of various elements in ZnO gives the ability to tune the optical and electrical properties for the targeted application by using a simple and cost-effective technique such as Ultrasonic Spray Pyrolysis (USP) using only water-based precursors solution and sodalime glass substrates. In particular, for transparent conductive oxide (TCO) films and buffer layers in solar cells, it is necessary to modulate the conductivity, for TCO, and the bandgap for optimal band alignment for buffer films.Therefore, the incorporation of Al in ZnO can increase the conductivity while the incorporation of Mg can increase the bandgap. However, the co-incorporation of Al and Mg in ZnO is particularly challenging. First, Mg can decrease the conductivity and, second, the poor miscibility of Al precursor in water and the high-density of defects degrade the electrical and optical properties of thin films deposited by USP.We have therefore developed a two-step process to address these issues. The first step consists in the optimization of the precursors solution parameters, mainly the concentrations and the pH, and the USP deposition parameters: the substrate temperature, the flow rate, the nozzle speed and the shaping air pressure. The second step of this process is based on a post-annealing treatment for which we optimized the temperature, the duration and the controlled atmosphere. The structural, optical and electrical properties of the deposited ZnMgAlO thin films, with Mg compositions up to 10% and Al compositions up to 5%, have been investigated using high-resolution X-Ray diffraction, UV-Vis. transmission spectroscopy and Hall Effect measurements, in addition to profilometry and microscopy for the surfaces analysis. The XRD results show that with using this process, the films exhibit a controlled single wurtzite phase when increasing Mg composition with a high preferential orientation along c-axis. The surface morphology of the films is uniform and homogeneous with a low roughness and an increase in the crystallite size for the optimized set of deposition and annealing parameters using the developed process, which well correlated to the XRD results. The transparency of the films increases up to almost 90%. The bandgap increases as expected when the Al and Mg compositions were increased. The electrical measurements show an increase in carrier concentration upon Al incorporation. However, this increase of free carrier concentration is balanced by the incorporation of Mg, which induces an increase in the band gap and passivation mechanism of the shallow donors. The developed process can be used to tune the optoelectronic properties of Zn(Mg,Al)O thin films for application as window and buffer layers in the next generation all-oxide solar cells based on Earth-abundant elements.