title: Near-field measurement of ZnS:Mn nanocrystal and bulk thin-film electroluminescent devices.
abstract: A near-field study of the electro-optical phenomena and aging characteristics of nanostructured and bulk ZnS:Mn alternating-current thin-film electro-optical devices is presented. ZnS:Mn nanocrystals embedded in the glass matrices as well as ZnS:Mn thin-film phosphors contain four different concentrations of Mn (from 0.05 to 1.0 mol%). The activator impurity in the phosphor influences the spectral properties and, to a large extent, the temporal properties of optical emission and an aging process of the devices. Therefore, a local photoluminescence and electroluminescence investigation using a scanning near-field optical microscope technique is provided and the aging characteristics of ZnS:Mn nanocrystal structure also presented.
authors.affiliation: Brno University of Technology, Faculty of Electrical Engineering and Communication, Physics Department, Technicka 8, 616 00 Brno, Czech Republic. grmela@feec.vutbr.cz
authors.forename: L
authors.initials: L
authors.lastname: Grmela
authors.forename: R
authors.initials: R
authors.lastname: Macku
authors.forename: P
authors.initials: P
authors.lastname: Tomanek