Low rare earth mineral photoluminescent compositions and structures for generating long-persistent luminescence
First Claim
1. A low rare earth mineral photoluminescent structure for generating long-persistent luminescence, said low rare earth mineral photoluminescent structure comprising:
- a phosphorescent layer that substantially converts at least a portion of incident electromagnetic radiation to a primary emission, said phosphorescent layer comprising one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent with an absorption spectrum that at least partially overlaps with incident electromagnetic radiation, andone or more fluorescent layers that wholly or partially convert at least said primary emission to a secondary emission, said one or more fluorescent layers having an absorption spectrum that overlaps with at least a portion of said primary emission, andwherein said primary emission and said secondary emission being of long-persistent luminescence.
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Abstract
A low rare earth mineral photoluminescent structure for generating long-persistent luminescence that utilizes at least a phosphorescent layer comprising one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent, and one or more fluorescent layers is disclosed. Further disclosed are methods for fabricating and using the inventive low rare earth mineral photoluminescent structure. A low rare earth mineral photoluminescent composition for generating long-persistent luminescence that utilizes at least one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent and one or more fluorescent materials is also disclosed, as well as, the methods for fabricating and using the inventive low rare earth mineral photoluminescent composition.
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Citations
51 Claims
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1. A low rare earth mineral photoluminescent structure for generating long-persistent luminescence, said low rare earth mineral photoluminescent structure comprising:
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a phosphorescent layer that substantially converts at least a portion of incident electromagnetic radiation to a primary emission, said phosphorescent layer comprising one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent with an absorption spectrum that at least partially overlaps with incident electromagnetic radiation, and one or more fluorescent layers that wholly or partially convert at least said primary emission to a secondary emission, said one or more fluorescent layers having an absorption spectrum that overlaps with at least a portion of said primary emission, and wherein said primary emission and said secondary emission being of long-persistent luminescence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for fabricating a low rare earth mineral photoluminescent structure for generating long-persistent luminescence, said method comprising:
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forming a phosphorescent layer that substantially converts at least a portion of incident electromagnetic radiation to a primary emission, said phosphorescent layer comprising one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent with an absorption spectrum that at least partially overlaps with incident electromagnetic radiation, and forming one or more fluorescent layers that wholly or partially convert at least said primary emission to a secondary emission, said one or more fluorescent layers having an absorption spectrum that overlaps with at least a portion of said primary emission, and wherein said primary emission and said secondary emission being of long-persistent luminescence. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for generating long-persistent luminescence, said method comprising:
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providing a low rare earth mineral photoluminescent structure, said low rare earth mineral photoluminescent structure comprising; (i) a phosphorescent layer comprising one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent with an absorption spectrum that at least partially overlaps with incident electromagnetic radiation, and (ii) one or more fluorescent layers having an absorption spectrum that overlaps with at least a portion of a primary emission, and wherein said low rare earth mineral photoluminescent structure is subsequently exposed to incident electromagnetic radiation and said phosphorescent layer substantially converts at least a portion of incident electromagnetic radiation to said primary emission, and said one or more fluorescent layers wholly or partially convert at least said primary emission to a secondary emission, and wherein said primary emission and said secondary emission being of long-persistent luminescence. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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33. A low rare earth mineral photoluminescent composition for generating long-persistent luminescence, said low rare earth mineral photoluminescent composition comprising:
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one or more phosphorescent materials that substantially convert at least a portion of incident electromagnetic radiation to a primary emission, said one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent with an absorption spectrum that at least partially overlaps with incident electromagnetic radiation, and one or more fluorescent materials that wholly or partially convert at least said primary emission to a secondary emission, said one or more fluorescent materials having an absorption spectrum that overlaps with at least a portion of said primary emission, and wherein said one or more phosphorescent materials substantially enhance stability of said one or more fluorescent materials, and wherein said primary emission and said secondary emission being of long-persistent luminescence. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40)
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41. A method for fabricating a composition for generating long-persistent luminescence, said method comprising:
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incorporating one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent with an absorption spectrum that at least partially overlaps with incident electromagnetic radiation, and one or more fluorescent materials having an absorption spectrum that overlaps with at least a portion of a primary emission into the composition, the composition being a low rare earth mineral photoluminescent composition, wherein said low rare earth mineral photoluminescent composition, when subsequently exposed to incident electromagnetic radiation, said one or more phosphorescent materials substantially convert at least a portion of incident electromagnetic radiation to said primary emission, and said one or more fluorescent materials wholly or partially convert at least said primary emission to a secondary emission, and wherein said one or more phosphorescent materials substantially enhance stability of said one or more fluorescent materials, and wherein said primary emission and said secondary emission being of long-persistent luminescence. - View Dependent Claims (42, 43, 44)
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45. A method for generating long-persistent luminescence, said method comprising:
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providing a low rare earth mineral photoluminescent composition, said low rare earth mineral photoluminescent composition comprising; (i) one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent with an absorption spectrum that at least partially overlaps with incident electromagnetic radiation, and (ii) one or more fluorescent materials having an absorption spectrum that overlaps with at least a portion of a primary emission, and wherein said low rare earth mineral photoluminescent composition is subsequently exposed to incident electromagnetic radiation, and said one or more phosphorescent materials substantially convert at least a portion of incident electromagnetic radiation to said primary emission, and said one or more fluorescent materials wholly or partially convert at least said primary emission to a secondary emission, and wherein said one or more phosphorescent materials substantially enhance stability of said one or more fluorescent materials, and wherein said primary emission and said secondary emission being of long-persistent luminescence. - View Dependent Claims (46, 47, 48, 49, 50, 51)
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Specification