title: Y₂O₃:Yb³⁺/Er³⁺ Hollow Spheres with Controlled Inner Structures and Enhanced Upconverted Photoluminescence.
abstract: Multishell Y2 O3 :Yb(3+) /Er(3+) hollow spheres with uniform morphologies and controllable inner structures are prepared successfully by using a glucose-template hydrothermal process followed by temperature-programmed calcination. Much enhanced upconverted photoluminescence of these Y2 O3 :Yb(3+) /Er(3+) are observed, which are due to the multiple reflections and the enhanced light-harvesting efficiency of the NIR light resulting from the special features of the multishell structures.
authors.affiliation: Department of Physical Chemistry, School of Metallurgical & Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
authors.forename: Lingbo
authors.initials: L
authors.lastname: Zong
authors.affiliation: Department of Physical Chemistry, School of Metallurgical & Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Xu
authors.affiliation: Department of Physical Chemistry, School of Metallurgical & Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
authors.forename: Yunji
authors.initials: Y
authors.lastname: Ding
authors.affiliation: Department of Physical Chemistry, School of Metallurgical & Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Zhao
authors.affiliation: Department of Physical Chemistry, School of Metallurgical & Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
authors.forename: Zumin
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, QLD, 4111, Australia.
authors.forename: Xuecheng
authors.initials: X
authors.lastname: Yan
authors.affiliation: Department of Physical Chemistry, School of Metallurgical & Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
authors.forename: Ranbo
authors.initials: R
authors.lastname: Yu
authors.affiliation: Department of Physical Chemistry, School of Metallurgical & Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.affiliation: Department of Physical Chemistry, School of Metallurgical & Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
authors.forename: Xianran
authors.initials: X
authors.lastname: Xing
keywords: hollow spheres; hydrothermal synthesis; multishell structure; photoluminescence; upconversion