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Persistent Luminescence in Strontium Aluminate: A Roadmap to a Brighter Future

机译：Persistent Luminescence in Strontium Aluminate: A Roadmap to a Brighter Future

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摘要

Glow-in-the-dark materials have been around for a long time. While formerlymaterials had to be mixed with radioactive elements to achieve a sufficientlylong and bright afterglow, these have now been replaced by much saferalternatives. Notably strontium aluminate, SrAl_2O_4, doped with europiumand dysprosium, has been discovered over two decades ago and since thenthe phosphor has transcended its popular use in watch dials, safety signage,or toys with more niche applications such as stress sensing, photocatalysis,medical imaging, or flicker-free light-emitting diodes. A lot of research effortsare focused on further improving the storage capacity of SrAl_2O_4:Eu~(2+),Dy~(3+),including in nanosized particles, and on finding the underlying physicalmechanism to fully explain the afterglow in this material and related compounds.Here an overview of the most important results from the research onSrAl_2O_4:Eu~(2+),Dy~(3+) is presented and different models and the underlying physicsare discussed to explain the trapping mechanism at play in these materials.

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