Simple Postsynthesis Thermal Treatment toward High Luminescence Performance of Rare Earth Vanadate Nanoparticles - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Crystal Growth & Design Année : 2023

Simple Postsynthesis Thermal Treatment toward High Luminescence Performance of Rare Earth Vanadate Nanoparticles

Résumé

Optical applications of colloidal oxide nanoparticles are often limited by low luminescence efficiencies caused by poor crystallinity and surface quenching. Bulk oxides prepared via conventional high-temperature annealing offer intense luminescence but commonly fail to yield stable colloidal dispersions. Coupling the best of these two situations to afford highly crystalline, dispersible nanoparticles with luminescence performance exceeding bulk solids is still challenging, thus requiring new safe, scalable, and reproducible methodologies. Herein we report a silicate-coating strategy followed by aggregate elimination to recover stable colloids of 40-150 nm single crystalline rare earth vanadates after unprotected annealing (800-1000 °C). Eu3+-doped nanoparticles showed enhanced photostability and ~50% emission quantum yields in water (λexc=280 nm), while Dy3+-, Tm3+-, and Yb3+/Er3+-doped vanadates provided remarkably intense multicolour emissions via downshift or upconversion luminescence. We correlated spectroscopic properties of pristine and annealed solids to microstructural characteristics to explain the superior emission features, opening new perspectives for sensing applications.

Domaines

Matériaux
Fichier principal
Vignette du fichier
Recuit non protégé.pdf (2.85 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04305852 , version 1 (24-11-2023)

Identifiants

Citer

Rafael Vieira Perrella, Rabei Mohammedi, Robin Kuhner, Christophe Cardone, Eric Larquet, et al.. Simple Postsynthesis Thermal Treatment toward High Luminescence Performance of Rare Earth Vanadate Nanoparticles. Crystal Growth & Design, 2023, 23 (8), pp.5389-5396. ⟨10.1021/acs.cgd.3c00308⟩. ⟨hal-04305852⟩
28 Consultations
43 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More