Ultra ‐Small YPO4‐YAG:Ce Composite Nanophosphors with a Photoluminescence Quantum Yield Exceeding 50%
The ultra-small YPO4-YAG:Ce nanocomposite phosphor particles having an exceptional quantum yield (QY)-to-size performance with an QY up to 53% while maintaining the particle size ≈10 nm have been synthesized. Distribution of P/extra Y entities played un essential role on the optic property and morphology of the material. AbstractSynthesis of high quality colloidal Cerium(III) doped yttrium aluminum garnet (Y3Al5O12:Ce3+, “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 col loidal 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 YPO4-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 YPO4 and YA...
Source: Small - Category: Nanotechnology Authors: Yige Yan,
Adel Mesbah,
Lhoussain Khrouz,
Corinne Bouillet,
Chantal Lorentz,
Nicholas Blanchard,
Anne C. Berends,
Marie Anne van de Haar,
Fr édéric Lerouge,
Michael R. Krames,
Ovidiu Ersen,
Frédéric Chaput,
Stephane Parola Tags: Research Article Source Type: research