title: Ultra-broadband near-infrared excitable upconversion core/shell nanocrystals.
abstract: Monodisperse Er(3+):NaGdF(4)@Ho(3+):NaGdF(4)@NaGdF(4) active-core/active-shell/inert-shell nanocrystals, which can extend the near-infrared wavelength excitable range for upconversion (UC) emissions, were successfully fabricated for the first time. Importantly, doping of Er(3+) and Ho(3+) into the core and shell respectively suppresses adverse energy transfers between them, resulting in intense UC emissions for both Er(3+) and Ho(3+) dopants.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
authors.forename: Daqin
authors.initials: D
authors.lastname: Chen
authors.forename: Lei
authors.initials: L
authors.lastname: Lei
authors.forename: Anping
authors.initials: A
authors.lastname: Yang
authors.forename: Zhaoxing
authors.initials: Z
authors.lastname: Wang
authors.forename: Yuansheng
authors.initials: Y
authors.lastname: Wang