Ultra-Small YPO 4 -YAG:Ce Composite Nanophosphors with a Photoluminescence Quantum Yield Exceeding 50.
Yige YanAdel MesbahLhoussain KhrouzCorinne BouilletChantal LorentzNicholas BlanchardAnne C BerendsMarie Anne van de HaarFrédéric LerougeMichael R KramesOvidiu ErsenFrédéric ChaputStéphane ParolaPublished in: Small (Weinheim an der Bergstrasse, Germany) (2023)
Synthesis of high quality colloidal Cerium(III) doped yttrium aluminum garnet (Y 3 Al 5 O 12 :Ce 3+ , "YAG:Ce") nanoparticles (NPs) meeting simultaneously both ultra-small size and high photoluminescence (PL) performance is challenging, as generally a particle size/PL trade-off has been observed for this type of nanomaterials. The glycothermal route is capable to yield ultra-fine crystalline colloidal YAG:Ce nanoparticles with a particle size as small as 10 nm but with quantum yield (QY) no more than 20%. In this paper, the first ultra-small YPO 4 -YAG:Ce nanocomposite phosphor particles having an exceptional QY-to-size performance with an QY up to 53% while maintaining the particle size ≈10 nm is reported. The NPs are produced via a phosphoric acid- and extra yttrium acetate-assisted glycothermal synthesis route. Localization of phosphate and extra yttrium entities with respect to cerium centers in the YAG host has been determined by fine structural analysis techniques such as X-ray diffration (XRD), solid state nuclear magnetic resonance (NMR), and high resolution scanning transmission electron microscopy (HR-STEM), and shows distinct YPO 4 and YAG phases. Finally, a correlation between the additive-induced physico-chemical environment change around cerium centers and the increasing PL performance has been suggested based on electron paramagnetic resonance (EPR), X-ray photoelectron spectrometry (XPS) data, and crystallographic simulation studies.
Keyphrases
- energy transfer
- high resolution
- quantum dots
- electron microscopy
- oxide nanoparticles
- magnetic resonance
- solid state
- mass spectrometry
- air pollution
- tandem mass spectrometry
- photodynamic therapy
- electronic health record
- high speed
- magnetic resonance imaging
- high glucose
- diabetic rats
- endothelial cells
- oxidative stress
- highly efficient
- data analysis
- simultaneous determination
- dual energy
- reduced graphene oxide
- contrast enhanced
- light emitting
- artificial intelligence
- gold nanoparticles
- deep learning
- computed tomography