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23 results on '"Cornier, Thibaut"'

1. Enhanced Photoluminescence of Europium-Doped TiO 2 Nanoparticles Using a Single-Source Precursor Strategy.

Author

Mendez, Violaine, Fabre, Marlène, Cornier, Thibaut, Bosselet, Françoise, Loridant, Stéphane, Asaad, Sarah, and Daniele, Stéphane

Subjects
SCANNING transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray powder diffraction, CRYSTALLINE interfaces, ELEMENTAL analysis
Abstract

TiO2:Eu3+ nanoparticles with varying europium concentrations were successfully synthesized via a one-pot sol–gel approach using a molecular heterometallic single-source precursor (SSP) Eu-Ti. For comparison, nanomaterials with similar europium levels were also produced by impregnating europium salts onto the same TiO2 substrate. All the nanomaterials were thoroughly characterized using Eu elemental analysis, powder X-ray diffraction (XRD), scanning (SEM), transmission (TEM), scanning transmission electron microscopy (STEM), Brunauer–Emmett–Teller (BET) analysis, thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and photoluminescence (PL). This low-temperature synthesis yielded crystalline powders, and calcination at 400 °C was performed to remove surface organic impurities, enabling a precise comparison of the final nanomaterials. While both preparation methods produced materials with similarly dispersed and localized dopants on the TiO2 surface, photoluminescence studies revealed that the SSP-derived nanomaterials exhibited significantly superior electro-optical properties. This enhanced efficiency is attributed to the co-hydrolysis of both reactants, which facilitates an optimized interface between the crystalline TiO2 core and the dopant-rich amorphous surface, thereby enabling far more effective charge transfer than that achieved by impregnation. [ABSTRACT FROM AUTHOR]

Published
2024
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6. Fluorinated Zirconia Prepared by Anionic Exchange of Zirconium Oxo/Hydroxide with Trifluoroacetic Acid: Structure, Acid‐Base and Catalytic Properties.

Author

Ben Salem, Roua, Cornier, Thibaut, Bargiela, Pascal, Lebeau, Bénédicte, Mishra, Shashank, and Essayem, Nadine

Subjects
*TRIFLUOROACETIC acid, *HYDROPHOBIC surfaces, *ZIRCONIUM, *HYDROXIDES, *ACETONE, *LACTIC acid, *ZIRCONIUM oxide
Abstract

Fluorinated zirconia were prepared by anionic exchange between commercial zirconium oxo/hydroxide of high surface area and trifluoracetic acid solutions. The new fluoride‐based catalysts contained high amount of F with superficial Zr/F ratio of 0.9 and 1.2 after calcination at 300 °C and 400 °C, respectively, and retained high surface areas. The impact of F insertion on the catalyst's acid‐base properties was studied by calorimetry of NH3 and CO2 adsorption and FTIR of pyridine adsorption. The insertion of F species was shown to inhibit the basicity of zirconia and to generate Brønsted acidity ascribed to the electron withdrawing of Fluorine. This is consistent with the selectivity changes observed in the gas phase isopropanol conversion leading to formation of propene at the expense of acetone over zirconia and selective aqueous phase dihydroxyacetone conversion into pyruvaldehyde with reduced formation of hexoses and Lactic acid upon F loading within zirconia framework. Fluorine atoms also made the catalyst's surface more hydrophobic. [ABSTRACT FROM AUTHOR]

Published
2023
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7. Doping zinc oxide nanohybrids for application in white light emitting diodes

Author

Apostoluk, Aleksandra, Zhang, Yu, Theron, Christophe, Cornier, Thibaut, Derkowska, Beata, Sypniewska, Malgorzata, Daniele, S., Masenelli, Bruno, Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Department of Semiconductor and Carbon Physics, Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicholas Copernicus University, and École supérieure de Chimie Physique Electronique de Lyon (CPE)

Subjects
[PHYS]Physics [physics], [SPI]Engineering Sciences [physics]
Abstract

International audience; We present a study concerning the effect of doping in inorganic/organic ZnO/PAAH (polyacrylic acid) nanohybrids. The doping atoms vary in their ionic size, electronic valence and concentration. Some of them have been are known to provide ZnO with magnetic properties. The effect on the optical properties of the ZnO nanoparticles of three different concentrations (0.1 %, 1 % and 5 %) of dopants is compared. The luminescent properties of the undoped and doped nanohybrids are reported.

Published
2021

9. Doped ZnO in Hybrid Nanostructure for White Lighting Applications

Author

Zhang, Yu, Apostoluk, Aleksandra, Masenelli, Bruno, Daniele, S., Lebail, Nicolas, Theron, Christophe, Cornier, Thibaut, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), IRCELYON-C'Durable (CDURABLE), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Apostoluk, Alexandra

Subjects
[SPI]Engineering Sciences [physics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI] Engineering Sciences [physics], [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.MAT] Engineering Sciences [physics]/Materials, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

International audience

Published
2019

10. ZnO nanoparticles and rare earth-doped oxides as phosphors for application in white light emitting diodes and other light emitters

Author

Apostoluk, Aleksandra, Zhang, Yu, Sosna-Glebska, Aleksandra, cornier, thibaut, Daniele, S., Znajdek, Katarzyna, Szczecińska, Natalia, Sibiński, Maciej, Masenelli, Bruno, Apostoluk, Alexandra, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), Łódź University of Technology, Department of Semiconductor and Optoelectronics Devices (DSOD), IRCELYON-C'Durable (CDURABLE), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SPI]Engineering Sciences [physics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI] Engineering Sciences [physics], [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.MAT] Engineering Sciences [physics]/Materials, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

International audience; We demonstrate white light emission from rare earth (RE)-free ZnO nanopowders and layers (undoped or doped with semiconducting and metallic ions) and RE–doped oxides (SrAl2O4:Eu,Dy and Sr4Al14O25:Eu,Dy) for comparison. The RE-free ZnO-based nanopowders and RE-based oxides exhibit white light emission, maintaining a high value of photoluminescent quantum efficiency (PL QE). It is noteworthy that the high PL QE value is obtained for a material without RE and that the broad light emission can be tuned by or the amount or valence of the incorporated metallic ion. We propose the use of these phosphors in a novel organic-inorganic white-light-emitting device in combination with a solid state UV light-emitting source.

Published
2019

11. Doped ZnO nanoparticles for WLED application

Author

Zhang, Yu, Apostoluk, Aleksandra, Masenelli, Bruno, Daniele, S., Lebail, Nicolas, Theron, Christophe, cornier, thibaut, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), IRCELYON-C'Durable (CDURABLE), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Apostoluk, Alexandra

Subjects
[SPI]Engineering Sciences [physics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI] Engineering Sciences [physics], [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.MAT] Engineering Sciences [physics]/Materials, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

International audience; ZnO can have excellent optical properties as a wide bandgap semiconductor with numerous intrinsic defects. The visible photoluminescence (PL) of ZnO originating from defects makes it a promising candidate for optoelectronic applications, such as white light emitting diodes (WLEDs). Since the industrialized WLEDs materials are dominated by rare-earth based phosphors, which are expensive and environmentally-unfriendly, ZnO provides a cheap and “green” way out for lighting devices. In our previous study, a hybrid sphere structure of ZnO nanoparticles and polyacrylic acid (PAA) matrix fabricated through a hydrolysis method has proven an efficient material emitting intensively in the visible range. [1] Herein, various dopants are introduced into ZnO hybrid structure in the same manner in order to optimize the photoluminescence of ZnO nanoparticles. Effects of dopant nature, size and valence are investigated at different doping concentrations at room temperature. The emission color of doped ZnO nanoparticles can be tuned in a wide visible range between yellow and green and the photoluminescent quantum yield (PL QY) can be improved by specific doping.References[1] Zhu, Y., A. Apostoluk, P. Gautier, A. Valette, L. Omar, T. Cornier, J. M. Bluet, K. Masenelli-Varlot, S. Daniele, and B. Masenelli. Scientific reports 6 (2016): 23557.

Published
2018

12. Doping ZnO inorganic-organic nanohybrids with metal elements

Author

Yu, Zhang, Apostoluk, Aleksandra, Theron, Christophe, cornier, thibaut, Canut, B., Daniele, S., Masenelli, Bruno, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), IRCELYON-C'Durable (CDURABLE), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Masenelli, Bruno

Subjects
[SPI]Engineering Sciences [physics], [SPI] Engineering Sciences [physics], [SPI.MAT] Engineering Sciences [physics]/Materials, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

International audience

Published
2018

13. Doped ZnO nanoparticles for lightning applications

Author

Apostoluk, Aleksandra, Masenelli, Bruno, Yu, Zhang, Daniele, S., Lebail, Nicolas, Théron, Christophe, cornier, thibaut, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), MATERIAUX (MATERIAUX), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), IRCELYON-C'Durable (CDURABLE), Institute of Physics, Polish Academy of Sciences, and Apostoluk, Alexandra

Subjects
[CHIM.MATE] Chemical Sciences/Material chemistry, [SPI]Engineering Sciences [physics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI] Engineering Sciences [physics], [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [CHIM] Chemical Sciences, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [CHIM]Chemical Sciences, [CHIM.MATE]Chemical Sciences/Material chemistry, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics
Abstract

International audience; The market of White Light Emitting Diodes (WLEDs) has known a tremendous development in the recent years, due to the possibility of the reduction of the energy consumption when compared to fluorescent or incandescent lamps. The materials most commonly used as phosphors in these diodes are based on rare-earth elements. Knowing that 95 % of rare earth elements are produced by China, it becomes clear that it is necessary to develop rare earthfree phosphors for future WLEDs. High photoluminescent quantum yield (PLQY), thermally stable green/yellow/red emission and easy scale–up process are required for the industrial applications of such new phosphors. Zinc oxide is a potential candidate for the replacement of rare earth-based phosphors for the application in WLEDs. ZnO nanoparticles (NPs) have recently aroused a growing interest as down-shifting materials as they exhibit luminescence in the visible due to various intrinsic crystalline defects or surface defects after the absorption of the UV light. The photoluminescence, internal PL quantum efficiency, morphology and crystal structure of ZnO nanoparticles doped with various atoms (metallic or not), synthesized by the sol-gel method have been studied.We show that the luminescent and colorimetric characteristics of doped ZnO nanoparticles depend on the choice of the corresponding doping atom and the doping concentration. Prospects for using zinc oxide as a phosphor in WLEDs are discussed, together with theircolor rendering index (to control the color of the WLEDs emission), correlated color temperature and PLQY.

Published
2018

14. Doped ZnO nanoparticles for WLEDs application

Author

Zhang, Y, Apostoluk, Aleksandra, Masenelli, Bruno, Daniele, S., Lebail, Nicolas, Theron, Christophe, cornier, thibaut, Masenelli, Bruno, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), IRCELYON-C'Durable (CDURABLE), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SPI]Engineering Sciences [physics], [SPI] Engineering Sciences [physics], [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

15. Livret de résumés Atelier 'Couplages à l'échelle nano dans les matériaux pour la santé et l'énergie-applications pour les Biocapteurs et le Photovoltaïque '

Author

Apostoluk, Aleksandra, Zhu, Y., Zhang, Y., Lebail, Nicolas, Theron, Christophe, cornier, thibaut, Daniele, S., Masenelli, Bruno, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), IRCELYON-C'Durable (CDURABLE), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), MATERIAUX (MATERIAUX), Groupement de Recherche (GDR) NACRE - Nanocristaux dans des diélectriques pour l’électronique et pour l’optique, and Apostoluk, Alexandra

Subjects
[SPI]Engineering Sciences [physics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI] Engineering Sciences [physics], [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.MAT] Engineering Sciences [physics]/Materials, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

National audience

Published
2017

16. Solution processing of hybrid ZnO nanophosphors assembled in mesosphere for LED applications

Author

Daniele, S., Lama, O., Lebail, Nicolas, Cornier, Thibaut, Zhang, Y., Apostoluk, Aleksandra, Masenelli, Bruno, Chadeyron, Geneviève, Audrey, Potdevin, MATERIAUX (MATERIAUX), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), IRCELYON-C'Durable (CDURABLE), INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de Clermont-Ferrand (ICCF), SIGMA Clermont (SIGMA Clermont)-Institut de Chimie du CNRS (INC)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Apostoluk, Alexandra

Subjects
[CHIM.MATE] Chemical Sciences/Material chemistry, [SPI]Engineering Sciences [physics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI] Engineering Sciences [physics], [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [CHIM] Chemical Sciences, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [CHIM]Chemical Sciences, [CHIM.MATE]Chemical Sciences/Material chemistry, [SPI.MAT] Engineering Sciences [physics]/Materials, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

National audience

Published
2017

18. ZnO nanoparticles as luminophores for LEDs and solar cells

Author

Apostoluk, Aleksandra, Zhang, Y., Lebail, Nicolas, Theron, Christophe, cornier, thibaut, Daniele, S., Masenelli, Bruno, Apostoluk, Alexandra, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), IRCELYON-C'Durable (CDURABLE), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), and MATERIAUX (MATERIAUX)

Subjects
[SPI]Engineering Sciences [physics], [CHIM.MATE] Chemical Sciences/Material chemistry, [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI] Engineering Sciences [physics], [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [CHIM] Chemical Sciences, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [CHIM]Chemical Sciences, [CHIM.MATE]Chemical Sciences/Material chemistry, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.MAT] Engineering Sciences [physics]/Materials, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

National audience

Published
2017

19. A rapidly developing market of white LEDs requires new solutions for replacing the rare earth-based phosphors, as 95 % of these materials come from China, creating a monopoly disadvantageous for other countries and a risk for the wide deployment of white LED technology in the coming years. Ona alternative to these rare-earth based phosphors is ZnO. It is a wide bandgap semiconductor, cheap, non-harmful and abundant in nature and it can emit visible light, from yellow to red, depending on the nature of the crystalline and surface defects [1]. IRCELyon recently developed a quick and convenient chemical sol-gel approach to obtain a unique mesospheric self-assembly of ZnO nanoparticles in a hybrid system with intense and stable photoluminescent quantum yield (PL QY) of 40-75 % [1]. This high PL QY is possible thanks to a so-called down-shifting (DS) process, a variant of the down-conversion. This synthesis route uses the mixture of commercially available polyacrylic acid (PAA)-based polymers and can provide large scale amounts of ZnO NPs in clear water suspensions which can be dried and dispersed again in water without compromising the performance (e.g. transparency and PL QY) of the final DS layer. We present the effects of the ZnO NPs surface functionalization and the influence of various doping atoms in ZnO NPs on their photoluminescence spectrum and the PL QY, in order to be able to favor and boost a desired color of emission.References:1.Y. Zhu, A. Apostoluk, P. Gautier, A. Valette, T. Cornier, J. Bluet, K. Masenelli-Varlot, S. Danièle, B. Masenelli, Scientific Reports 6, pp. 23557 (1-11), 2016

Author

Apostoluk, Aleksandra, Zhang, Yu, Le Bail, Nicolas, cornier, thibaut, Daniele, S., Masenelli, Bruno, Masenelli, Bruno, INL - Spectroscopies et Nanomatériaux (INL - S&N), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), IRCELYON-C'Durable (CDURABLE), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)

Subjects
[SPI]Engineering Sciences [physics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI] Engineering Sciences [physics], [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.MAT] Engineering Sciences [physics]/Materials, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

International audience

Published
2017

20. Pressure-Induced Disordering in SnO2 Nanoparticles

Author

Girão, Helainne T., primary, Cornier, Thibaut, additional, Daniele, Stéphane, additional, Debord, Régis, additional, Caravaca, Maria A., additional, Casali, Ricardo A., additional, Mélinon, Patrice, additional, and Machon, Denis, additional

Published
2017
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22. Pressure-Induced Phase Transitions in TiO2Rutile Nanorods

Author

Machon, Denis, Le Bail, Nicolas, Hermet, Patrick, Cornier, Thibaut, Daniele, Stéphane, and Vignoli, Stéphane

Abstract

TiO2nanorods (diameter of 6–8 nm) with the rutile-type structure have been investigated by Raman spectroscopy under high pressure. Additional bands in the Raman spectrum at ambient pressure are interpreted as resulting from defects that break the Raman selection rules as the simulated vibrational density of states (vDOS) is in good agreement with the experimental spectrum. Under pressure, the rutile structure transforms to the baddeleyite one at P∼ 16 GPa. After the pressure cycle, the α-PbO2phase is recovered. The sequence of phases is discussed in terms of thermodynamics and kinetics based on crystallographic relationships. In contrast to other one-dimensional TiO2nanomaterials that adopt a metastable structure, the nanorods studied in this work show little impact of the morphology on the phase transitions sequence compared to that of the bulk TiO2.

Published
2018
Full Text
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