Upconversion luminescence properties and ...
Type de document :
Article dans une revue scientifique
URL permanente :
Titre :
Upconversion luminescence properties and thermal quenching mechanisms in the layered perovskite La 1.9 Er 0.1 Ti 2 O 7 towards an application as optical temperature sensor
Auteur(s) :
Bayart, Alexandre [Auteur]
Szczepanski, Fabien [Auteur]
Blach, Jean-Francois [Auteur]
UCCS Équipe Couches Minces & Nanomatériaux
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Rousseau, Jolanta [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
UCCS Équipe Catalyse Supramoléculaire
Katelnikovas, Arturas [Auteur]
Saitzek, Sebastien [Auteur]
UCCS Équipe Couches Minces & Nanomatériaux
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Szczepanski, Fabien [Auteur]
Blach, Jean-Francois [Auteur]
UCCS Équipe Couches Minces & Nanomatériaux
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Rousseau, Jolanta [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
UCCS Équipe Catalyse Supramoléculaire
Katelnikovas, Arturas [Auteur]
Saitzek, Sebastien [Auteur]
UCCS Équipe Couches Minces & Nanomatériaux
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Titre de la revue :
Journal of Alloys and Compounds
Numéro :
744
Pagination :
516-527
Éditeur :
Elsevier
Date de publication :
2018-05-05
Mot(s)-clé(s) en anglais :
Layered-perovskite
X-ray diffraction
Luminescence properties
Upconversion properties
Thermal quenching
X-ray diffraction
Luminescence properties
Upconversion properties
Thermal quenching
Discipline(s) HAL :
Chimie/Catalyse
Chimie/Chimie inorganique
Chimie/Chimie inorganique
Résumé en anglais : [en]
The structural evolution between the monoclinic (layered-perovskite) and cubic (pyrochlore) structures is studied for the complete series of La2-xErxTi2O7 synthetized by solid-state reaction. A partial solid solution with ...
Lire la suite >The structural evolution between the monoclinic (layered-perovskite) and cubic (pyrochlore) structures is studied for the complete series of La2-xErxTi2O7 synthetized by solid-state reaction. A partial solid solution with layered perovskite structure is achieved until x = 0.10. The luminescence properties of these oxides show a low quantum efficiency and the concentration quenching is observed for x = 0.10. However, La1.9Er0.1Ti2O7 oxide exhibits interesting UpConversion (UC) properties at multiple excitation wavelengths (784, 808 and 980 nm). Laser power studies have demonstrated a two-photon upconversion process for 808 and 980 nm excitations. Moreover, the measurement of the lifetimes on the 4F9/2 → 4I15/2 and 4S3/2 → 4I15/2 transitions makes it possible to identify an Energy Transfer (ET) mechanism. The thermal effect on upconversion properties is also studied under 808 nm excitation. The UC intensity shows atypical evolutions: 4F9/2 → 4I15/2 transition follows a continuous decrease as a function of temperature, while 4S3/2 → 4I15/2 and 2H11/2 → 4I15/2 transitions reach maxima at 150 and 450 K, respectively. The calculation of temperature dependent Fluorescence Intensity Ratio and CIE 1931 color coordinates indicated that La1.9Er0.1Ti2O7 oxide could serve as a temperature sensor.Lire moins >
Lire la suite >The structural evolution between the monoclinic (layered-perovskite) and cubic (pyrochlore) structures is studied for the complete series of La2-xErxTi2O7 synthetized by solid-state reaction. A partial solid solution with layered perovskite structure is achieved until x = 0.10. The luminescence properties of these oxides show a low quantum efficiency and the concentration quenching is observed for x = 0.10. However, La1.9Er0.1Ti2O7 oxide exhibits interesting UpConversion (UC) properties at multiple excitation wavelengths (784, 808 and 980 nm). Laser power studies have demonstrated a two-photon upconversion process for 808 and 980 nm excitations. Moreover, the measurement of the lifetimes on the 4F9/2 → 4I15/2 and 4S3/2 → 4I15/2 transitions makes it possible to identify an Energy Transfer (ET) mechanism. The thermal effect on upconversion properties is also studied under 808 nm excitation. The UC intensity shows atypical evolutions: 4F9/2 → 4I15/2 transition follows a continuous decrease as a function of temperature, while 4S3/2 → 4I15/2 and 2H11/2 → 4I15/2 transitions reach maxima at 150 and 450 K, respectively. The calculation of temperature dependent Fluorescence Intensity Ratio and CIE 1931 color coordinates indicated that La1.9Er0.1Ti2O7 oxide could serve as a temperature sensor.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Université de Lille
Collections :
Équipe(s) de recherche :
Catalyse et chimie supramoléculaire (CASU)
Couches minces & nanomatériaux (CMNM)
Couches minces & nanomatériaux (CMNM)
Date de dépôt :
2019-09-25T14:37:49Z
2021-02-26T08:55:33Z
2021-02-26T08:55:33Z