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: Tags: Research Article Source Type: research