Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Patent
1992-10-13
1994-06-07
Cooper, Jack
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
C09K 1180
Patent
active
053187229
ABSTRACT:
Afterglow in a luminescent material in which a significant factor in afterglow is the release of holes from hole traps in the scintillator material is substantially reduced by adding a hole-trapping species to the scintillator composition which successfully competes with the hole traps in the basic scintillator composition. In gadolinium gallium garnet activated with chromium, the addition of cerium, terbium or praseodymium reduces afterglow in this manner.
REFERENCES:
patent: 3591517 (1971-07-01), Van der Ziel et al.
patent: 4824598 (1989-04-01), Stokowski
patent: 5057692 (1991-10-01), Greskovich et al.
D. J. Robbins et al., "The Temperature Dependence of Rare Earth Activated Garnet Phosphors-I. Intensity and Lifetime Measurements on Undoped and Ce-Doped Y.sub.3 Al.sub.5 O.sub.12 ", J. Electrochemical Society, vol. 126, No. 7, Jul. 1979, pp. 1213-1220.
D. J. Robbins et al., "The Temperature Dependence of Rare-Earth Activated Garnet Phosphors-II. A Comparative Study of Ce.sup.3+ Eu.sup.3+, Tb.sup.3+, and Gd.sup.3+ in Y.sub.3 Al.sub.5 O.sub.12 ", J. Electrochemical Society, vol. 126, No. 7, Jul. 1979, pp. 1221-1228.
D. J. Robbins et al., "The Relationship Between Concentration and Efficiency in Rare Earth Activated Phosphors", vol. 126, No. 9, Sep. 1979, pp. 1556-1563.
D. J. Robbins, et al., "The Effects of Core Structure on Radiative and Non-Radiative Recombinations at Metal Ion Substituents in Semiconductors and Phosphors", Advances in Physics, vol. 27, No. 4, 1978, pp. 499-532.
Shmulovich et al "Chem. Abstracts", vol. 102, 1985, 212006f.
Mares "Chem. Abstracts", vol. 103, 1985, 186551d.
Greskovich Charles D.
Tsoukala Veneta G.
Cooper Jack
General Electric Company
Snyder Marvin
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