title: Dual energy converting nano-phosphors: upconversion luminescence and X-ray excited scintillation from a single composition of lanthanide-doped yttrium oxide.
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.
authors.affiliation: Department of Chemistry, French Family Science Center, Duke University, 124 Science Drive, Durham, North Carolina 27708, USA.
authors.forename: Ian N
authors.initials: IN
authors.lastname: Stanton
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: Ayres
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Therien
mesh_terms: D004583:Electrons; D005456:Fluorescent Dyes / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D056928:X-Ray Absorption Spectroscopy; D015019:Yttrium / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D007477:Ions; D028581:Lanthanoid Series Elements; D015019:Yttrium; D008094:Lithium; C091417:yttria