title: Cathodo- and photoluminescence in Yb(3+)-Er(3+) co-doped PbF(2) nanoparticles.
abstract: We have prepared and studied the PbF(2):(Yb(3+),Er(3+)) co-doped nanoparticles, with chemical formula (Yb-Er)(x)Pb(1-x)F(2+x), where x = 0.29, Yb(3+)/Er(3+) = 6, and estimated the energy efficiency for their cathodoluminescence, mostly of Yb(3+), and up-conversion photoluminescence of Er(3+) to reach more than 0.5% and 20%, respectively, which may be the highest to date for rare-earth doped nanoparticles. Electron beam induced temperature rise in the nanoparticles has been estimated by measuring the ratio of green emission bands of Er(3+). These high efficiencies are due to high doping level of nanoparticles and due to low phonon energy of the PbF(2) host.
authors.affiliation: INPAC - Institute for Nanoscale Physics and Chemistry, Catholic University Leuven, Belgium. Victor.Tikhomirov@fys.kuleuven.be
authors.forename: V K
authors.initials: VK
authors.lastname: Tikhomirov
authors.forename: G
authors.initials: G
authors.lastname: Adamo
authors.forename: A E
authors.initials: AE
authors.lastname: Nikolaenko
authors.forename: V D
authors.initials: VD
authors.lastname: Rodriguez
authors.forename: P
authors.initials: P
authors.lastname: Gredin
authors.forename: M
authors.initials: M
authors.lastname: Mortier
authors.forename: N I
authors.initials: NI
authors.lastname: Zheludev
authors.forename: V V
authors.initials: VV
authors.lastname: Moshchalkov