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  • Dual energy converting nano-phosphors: upconversion luminescence and X-ray excited scintillation from a single composition of lanthanide-doped yttrium oxide.

Dual energy converting nano-phosphors: upconversion luminescence and X-ray excited scintillation from a single composition of lanthanide-doped yttrium oxide.

Dalton transactions (Cambridge, England : 2003) (2012-09-04)
Ian N Stanton, Jennifer A Ayres, Michael J Therien
ABSTRACT

We report an upconverting nanomaterial composition, [Y(2)O(3); Yb (2%), Er (1%)], that converts both X-ray and high-fluence NIR irradiation to visible light. This composition is compared to a higher Yb(3+) doped composition, [Y(2)O(3); Yb (10%), Er (1%)], that displays diminished visible X-ray scintillation, but shows enhanced red wavelength centered upconversion emission. These nanocrystals have been characterized by TEM, X-ray diffraction, power-dependent upconversion luminescence, and X-ray scintillation spectroscopy. We further demonstrate that lithium ion doping of the [Y(2)O(3); Yb (2%), Er (1%)] nanoscale composition leads to enhanced X-ray and NIR excited emission intensities through the production of nanoparticles that feature slightly enhanced sizes and increased crystallinity.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Yttrium(III) oxide, 99.99% trace metals basis
Sigma-Aldrich
Yttrium(III) oxide, 99.999% trace metals basis
Sigma-Aldrich
Yttrium(III) oxide, nanopowder, <50 nm particle size
Sigma-Aldrich
Yttrium(III) oxide, dispersion, 10 wt. % in isopropanol, nanoparticles, <100 nm (DLS), ≥99.9% trace metals basis