Abstract:
A method for forming a powder phosphor electroluminescent display (100, 600) includes forming a dielectric film (140, 630) on a plurality of sides of an uncoated phosphor layer (150, 640, 640', 640"), wherein the dielectric film (140, 630) is formed via a polymer multilayer process.
Abstract:
This invention provides phosphor-doped fluoroperovskite compounds that are capable of storing at least part of the energy of incident ionizing radiation and releasing at least part of the stored energy upon optical stimulation or heating. Also provided are dosimeters and radiation storage devices comprising the compounds, methods of preparing the compounds, and methods of using the compounds to determine a dose of ionizing radiation or to record and reproduce an ionizing radiation image.
Abstract:
The present invention relates to a doped calcium fluoride and in particular to a calcium fluoride precipitate doped with Eu and to a method for producing such a phosphor. Conventionally techniques such as disclosed in, "Ion-beam induced white luminescence of calcium fluoride implanted with both Eu and Tb ions", Aono et al, Jpn. J. Appl. Phys. Vol.32 (1993) pp 3851-3853, Part 1, No. 9A, September 1993 (Aono) produce Eu and Tb implanted calcium fluoride (CaF2). However, there are significant disadvantages associated with using the Aono technique such as the duration of manufacture and the quality of the resulting product. Therefore, an embodiment of the present invention provides a calcium fluoride precipitate doped with ions. Preferably, the calcium fluoride precipitate is doped with at least one of a plurality of lanthanide ions, preferably Eu , Eu , ions of Tb or Dy, or at least one group IIIb ion, preferably, ions of T1. Accordingly, an embodiment of the present invention provides a method for manufacturing a calcium fluoride precipitate, the method comprising the steps of producing a dopant solution using a salt of at least a first dopant and a solvent for that salt; producing a solution of CaCl2; mixing the dopant solution and CaCl2 solution with hydrogen fluoride to produce a calcium fluoride precipitate doped with ions of the first dopant.