Compositions – Inorganic luminescent compositions – Zinc or cadmium containing
Patent
1996-04-24
1997-12-30
Bonner, Melissa
Compositions
Inorganic luminescent compositions
Zinc or cadmium containing
313509, 313503, 428690, C09K 1154, C09K 1156
Patent
active
057026432
ABSTRACT:
A improved ZnS:Cu electroluminescent phosphor having a halflife of at least about 900 hours. The halflife improvement is made by doping the phosphor with minor amounts of gold and substantially increasing the amount of low intensity milling between firing steps. The improved phosphor has a dramatically longer halflife without sacrificing brightness or exhibiting large shifts in emission color.
REFERENCES:
patent: 4859361 (1989-08-01), Reilly et al.
patent: 5110499 (1992-05-01), Reilly
Reddy Vaddi Butchi
Reilly Kenneth T.
Bonner Melissa
McNeill William H.
Osram Sylvania Inc.
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