title: [Upconversion of oxide Y2O3 doped with (Yb3+ , Er3+) ions with 978 nm excitation].
abstract: Two nanomaterials Y2O3 : Er3+ and Y2O3 : (Yb3+, Er3+) were prepared by combustion on the basis of reagents Y2O3, Yb2O3 and Er2O3. The corresponding host Y2O3 : (Yb3+, Er3+) was obtained by increasing calcination temperature. Upconversion emission was obtained under 978 nm LD excitation. Comparing nanopowder oxide Y2O3 : Er3+ with nanometer materials Y2O3 : (Yb3+, Er3+) with respect to upconversion spectra, the upconversion emission of the former mainly was green upconversion and that of the latter mainly red light. However, the upconversion emission of nanopowder Y2O3 : (Yb3+, Er3+) was different from that of its corresponding host, with main red upconversion emission for the former but main green upconversion emission on the latter.
authors.affiliation: Department of Applied Physics, Hunan University, Changsha 410082, China.
authors.forename: Huang-Qing
authors.initials: HQ
authors.lastname: Liu
authors.forename: Ling-Ling
authors.initials: LL
authors.lastname: Wang
authors.forename: Hong-Jian
authors.initials: HJ
authors.lastname: Li
mesh_terms: D004735:Energy Transfer; D004871:Erbium / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D008163:Luminescent Measurements / Q000379:methods*; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry; D013053:Spectrophotometry; D014961:X-Ray Diffraction; D015018:Ytterbium / Q000737:chemistry*; D015019:Yttrium / Q000737:chemistry*
chemical_list: D007477:Ions; D015019:Yttrium; D004871:Erbium; D015018:Ytterbium; C091417:yttria