Near infrared doped phosphors having an alkaline gallate matrix
AssigneeUniversity of Georgia Research Foundation, Inc.
InventorsZhengwei Pan, Wuzhao Yan
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Abstract
Phosphors based on doping of an activator (an emitter) into a host matrix are disclosed herein. Such phosphors include alkaline gallate phosphors doped with Cr3+ or Ni2+ ions, which in some embodiments can exhibit persistent infrared phosphorescence for as long as 200 hours. Such phosphors can be used, for example, as components of a luminescent paint.
Claims19
A phosphor comprising a material having one or more of the following formulas:
- AGa5O8:xC,yR;and
- AGaO2:xC,yR
- wherein a portion of Ga may optionally be replaced with a Group IIIA metal and/or a Group IVA metal;
- and
- wherein each A is independently an alkaline metal;
- each C is independently Cr3+, Ni2+, or a combination thereof;
- each R is independently a Zn2+ ion, an alkaline earth metal ion, or a combination thereof;
- each x is independently 0.01 to 5 and represents mol % based on the total moles of Ga and any replacements thereof;
- and
- each y is independently 0.1 to 2 and represents mol % based on the total moles of Ga and any replacements thereof.
A phosphor comprising a material having one or more of the following formulas:
- AGa5O8:xC,yR;and
- AGaO2:xC,yR
- wherein a portion of Ga may optionally be replaced with a Group IIIA metal and/or a Group IVA metal;
- and
- wherein each A is independently an alkaline metal;
- wherein each C is a combination of Cr3+ and Ni2+;
- each R is independently a Zn2+ ion, an alkaline earth metal ion, or a combination thereof;
- each x is independently 0.01 to 5 and represents mol % based on the total moles of Ga and any replacements thereof;
- and
- each y is independently 0 to 5 and represents mol % based on the total moles of Ga and any replacements thereof.
A phosphor comprising a material having one or more of the following formulas:
- AGa5O8:xC,yR;and
- AGaO2:xC,yR
- wherein a portion of Ga is substituted with a Group IVA metal;
- and
- wherein each A is independently an alkaline metal;
- each C is independently Cr3+, Ni2+, or a combination thereof;
- each R is independently a Zn2+ ion, an alkaline earth metal ion, or a combination thereof;
- each x is independently 0.01 to 5 and represents mol % based on the total moles of Ga and any replacements thereof;
- and
- each y is independently 0 to 5 and represents mol % based on the total moles of Ga and any replacements thereof.
A luminescent paint comprising a phosphor comprising a material having one or more of the following formulas:
- AGa5O8:xC,yR;and
- AGaO2:xC,yR
- wherein a portion of Ga may optionally be replaced with a Group IIIA metal and/or a Group IVA metal;
- and
- wherein each A is independently an alkaline metal;
- each C is independently Cr3+, Ni2+, or a combination thereof;
- each R is independently a Zn2+ ion, an alkaline earth metal ion, or a combination thereof;
- each x is independently 0.01 to 5 and represents mol % based on the total moles of Ga and any replacements thereof;
- and
- each y is independently 0 to 5 and represents mol % based on the total moles of Ga and any replacements thereof.
Dependencies are inferred from the claim text.