Suppression of luminescence quenching at the nanometer scale in Gd2O3 doped with Eu3+ or Tb3+: Systematic comparison between nanometric and macroscopic samples of life-time, quantum yield, radiative and non-radiative decay rates

Abstract

International audienc

Structure and photoluminescent properties of (200)-oriented Eu-doped CeO2 thin films fabricated on fused silica substrates by chemical solution deposition

“…This is the so-called concentration quenching effect. Similar quenching phenomenon has been reported in various rareearth doped phosphors, and differs for different rare-earth ions, hosts, structures, grain sizes and annealing temperatures [27]. The quenching effect of Eu 3+ ions has been considered to be contributed by Eu-Eu energy transfer, phonon-assisted dipole and multi-pole energy transfer [28].…”

Optical and rheological study of gamma irradiated rare-earth nanoparticle based ferrofluids

“…In fact, the suspended nanoparticles are in a state of random movement (Brownian motion) due to thermal agitation and are allowed to interact with each other [10]. The RE oxide based phosphors are widely used in high-performance luminescent devices, catalysts, and other functional devices based on the electronic, optical, and optoelectronic features arising from the participation of 4f electrons [11,12].…”

Multispectral Emissions of Lanthanide-Doped Gadolinium Oxide Nanophosphors for Cathodoluminescence and Near-Infrared Upconversion/Downconversion Imaging

“…To investigate the spectral distinction of lanthanide-doped NPPs for correlating CL and NIR, Tm 3+ /Yb 3+ , Ho 3+ /Yb 3+ , and Er 3+ /Yb 3+ ions were selected for the activator/sensitizer association in this work. An appropriate activator/sensitizer dopant concentration is one of the most important factors for getting the highest emission intensity at a distinct wavelength for NIR, as it is well known that the luminescence intensity depends on the sensitizer/activator concentration in NIR emissions [34,35,36]. The concentration quenching varies among the sensitizer/activator combinations.…”