Patent ID: 7372196
Filing Date: 2008-05-13
Classification: C09K,H01J

Abstract:
1. A plasma display screen comprising a carrier plate, a transparent front plate, a ribbed structure which divides the space between the carrier plate and the front plate into plasma cells which are filled with a gas, one or more electrode arrays for generating corona discharges in the plasma cells, and a phosphor layer comprising a phosphor selected from the group composed of doped terbium(III)-activated phosphors of the general formula (In 1-x-y-z Gd y Y z )BO 3 :Tb x where 0<x≦0.5, 0<y≦0.5, 0≦z≦0.5 and 1-x-y-z>0, wherein the phosphor comprises a vaterite structure host lattice with two crystallographically independent lattice sites which are doped with the terbium(III) activator, wherein one lattice site has an inversion center and another lattice site does not have the inversion center, and wherein the terbium(III) activator occupies the two lattice sites.