Low rare earth mineral photoluminescent compositions and structures for generating long-persistent luminescence

摘要

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.

主权项

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, 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.