| People | Locations | Statistics |
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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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Sánchez Royo, Juan Francisco
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024Origin of discrete donor–acceptor pair transitions in 2D Ruddlesden–Popper perovskitescitations
- 2024Origin of discrete donor–acceptor pair transitions in 2D Ruddlesden–Popper perovskitescitations
- 2024Elastic and inelastic strain in submicron-thick ZnO epilayers grown on r-sapphire substrates by metal-organic vapour phase depositioncitations
- 2024Elastic and inelastic strain in submicron-thick ZnO epilayers grown on <i>r</i>-sapphire substrates by metal–organic vapour phase depositioncitations
- 2024Origin of discrete donor-acceptor pair transitions in 2D Ruddlesden-Popper perovskitescitations
- 2022Tin perovskite solar cells with >1,300 h of operational stability in N2 through a synergistic chemical engineering approachcitations
- 2022In Situ Synthesis of Polythiophene and Silver Nanoparticles within a PMMA Matrix: A Nanocomposite Approach to Thermoelectricscitations
- 2021Solution-Processed Ni-Based Nanocomposite Electrocatalysts: An Approach to Highly Efficient Electrochemical Water Splittingcitations
- 2016111 oriented gold nanoplatelets on multilayer graphene as visible light photocatalyst for overall water splittingcitations
- 2001Optical and photovoltaic properties of indium selenide thin films prepared by van der Waals epitaxycitations
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article
Elastic and inelastic strain in submicron-thick ZnO epilayers grown on <i>r</i>-sapphire substrates by metal–organic vapour phase deposition
Abstract
<jats:p>A significant part of the present and future of optoelectronic devices lies on thin multilayer heterostructures. Their optical properties depend strongly on strain, being essential to the knowledge of the stress level to optimize the growth process. Here the structural and microstructural characteristics of sub-micron <jats:italic>a</jats:italic>-ZnO epilayers (12 to 770 nm) grown on <jats:italic>r</jats:italic>-sapphire by metal–organic chemical vapour deposition are studied. Morphological and structural studies have been made using scanning electron microscopy and high-resolution X-ray diffraction. Plastic unit-cell distortion and corresponding strain have been determined as a function of film thickness. A critical thickness has been observed as separating the non-elastic/elastic states with an experimental value of 150–200 nm. This behaviour has been confirmed from ultraviolet photoelectron spectroscopy, X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy measurements. An equation that gives the balance of strains is proposed as an interesting method to experimentally determine this critical thickness. It is concluded that in the thinnest films an elongation of the Zn—O bond takes place and that the plastic strained ZnO films relax through nucleation of misfit dislocations, which is a consequence of three-dimensional surface morphology.</jats:p>