Accession Number : ADA303387

Title :   Preparation and Investigation of Phosphors for Emissive Displays.

Descriptive Note : Annual technical rept. Aug 94-Sep 95,

Corporate Author : GREENWICH UNIV LONDON (UNITED KINGDOM)

Personal Author(s) : Vecht, Aron

PDF Url : ADA303387

Report Date : OCT 1995

Pagination or Media Count : 48

Abstract : We have supplied two major FED manufacturers with appreciable quantities of phosphor (Micron and SI Diamond Technology). New methods for the preparation of fine particle phosphors, based on novel microwave techniques and 'new' milling systems have been developed. Phosphors in the range of 1.7-3.2 microns have been made with efficiencies and brightnesses better than those available commercially, more especially, Y2O3:Eu and Y2(Al/Ga5)O12:Tb. Improved efficiency and stability has been achieved in ZnO:Zn by a range of novel surface modifications. Within the limits of our testing facility, it would appear that the maintenance of these phosphors would now make them commercially useful. Of new lattices investigated, barium substituted ZnO:Zn, which produced a red shift, and lanthanide activated YNbO4 were of most interest. Aerosol spray pyrolysis methods previously developed have been refined and improved to yield the best ZnO:Zn and Y2O:Eu films reported so far. The results from different thickness films in simple and composite thin film layers indicate a definite relationship between phosphor volume and efficiency. (AN)

Descriptors :   *CATHODE RAY TUBES, *PHOSPHORS, YTTRIUM ALUMINUM GARNET, PREPARATION, SYNTHESIS(CHEMISTRY), THIN FILMS, EFFICIENCY, OPTICAL MATERIALS, HIGH RESOLUTION, BRIGHTNESS, FIELD EMISSION, ZINC OXIDES, CATHODOLUMINESCENCE, LOW VOLTAGE, REFRACTORY MATERIALS, PYROLYSIS, GREAT BRITAIN, CATHODE RAY TUBE SCREENS, LUMINANCE, HIGH VOLTAGE, YTTRIUM OXIDES, FINE GRAINED MATERIALS, EUROPIUM, NIOBATES, SOL GEL PROCESSES.

Subject Categories : Radiation and Nuclear Chemistry
      Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE