Coactivated yttrium phosphate phosphor and lamp containing same

Details Coactivated yttrium phosphate phosphor and lamp containing same Coactivated yttrium phosphate phosphor and lamp containing same

C - Chemistry, Metallurgy

09

K

C09K 11/81 (2006.01) H01J 61/44 (2006.01) A61N 5/06 (2006.01)

Patent

CA 2590819

The sensitivity of YPO4:Ce phosphors to 185 nm radiation may be increased by incorporating a praseodymium coactivator. The use of Ce and Pr as co- activators in a YPO4 phosphor improves the sensitivity of the phosphor to excitation by both 185 nm and 254 nm radiation and should increase total UVA and UVB output in fluorescent lamps. The co-activated phosphor has emission peaks at about 355 nm and about 335 nm.

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