Long persistence red phosphors

Details Long persistence red phosphors Long persistence red phosphors

1999-02-26

2000-08-08

Koslow, C. Melissa

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

2523014P, C09K 1171, C09K 1159, C09K 1155

Patent

active

060997540

ABSTRACT:
Long persistence red phosphors of alkaline earth metal phosphates, alkaline earth magnesium silicates and alkaline earth magnesium di-silicates are doubly activated with europium and manganese and contain a trivalent or quadrivalent thermal trapping agent. The thermal trapping cation feeds thermal energy to the europium ion which in turn feeds the energy to the manganese ion that emits in the red region of the spectrum.

REFERENCES:
patent: 3882041 (1975-05-01), Royce
patent: 5043096 (1991-08-01), Lindmayer
patent: 5367176 (1994-11-01), Leblans et al.
patent: 5650094 (1997-07-01), Royce et al.
Chemical Abstract citation 80:102,210; abstract for Japanese B4 patent JP48034115, published Oct. 18, 1973.

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