title: [Up-conversion luminescent materials of Y2O3: RE(RE=Er or Er/Yb) prepared by sol-gel combustion synthesis].
abstract: Y2O3 powders doped with rare-earth ions were synthesized by sol-gel combustion synthesis. Effects of different calcinating temperatures, Er+ doping concentration and Yb3+ doping concentration were investigated. It was shown that the single well crystallized Y2O3 powders could be obtained at 800 degrees C; as the calcinating temperature increased, the crystallinity and upconversion luminescence intensity were higher; the particle size was uniform around 1 microm at 900 degrees C; when Er3+ doping concentration was 1 mol%, the green upconversion luminescence intensity reached the maximum, but for red upconversion luminescence, when Er3+ doping concentration was 4 mol%, its luminescence intensity reached the maximum; as the ratio of Yb3+ to Er3+ was 4:1, the green emission intensity reached the maximum, while the red emission intensity was always increasing as Yb3+ doping concentration increased.
authors.affiliation: College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China. hanpengde@163.com
authors.forename: Peng-de
authors.initials: PD
authors.lastname: Han
authors.forename: Le
authors.initials: L
authors.lastname: Zhang
authors.forename: Xiao-gu
authors.initials: XG
authors.lastname: Huang
authors.forename: Li-xi
authors.initials: LX
authors.lastname: Wang
authors.forename: Qi-tu
authors.initials: QT
authors.lastname: Zhang