Journal
NANOMATERIALS
Volume 8, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/nano8040260
Keywords
persistent luminescence; afterglow; spectral tuning; nanophosphor; nanocomposite
Categories
Funding
- National Natural Science Foundation of China [21701052]
- National Natural Science Foundation of Guangdong Province of China [32217073]
- Special Funds for Basic Scientific Research Operations of Central Universities of China [11617323]
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Colorful spectra are important for the diverse applications of persistent phosphors. A color conversion concept is developed to obtain abundant persistent luminescence color by mining capacities of known persistent phosphors with the most efficient persistent properties. Here, SiO2/Sr2MgSi2O7:Eu,Dy nanoparticles are chosen as a blue persistent luminescence donor nanophosphor, while ultrafine CaAlSiN3:Eu is utilized as a red conversion phosphor to tune the persistent luminescence spectra from blue to red. The red afterglow emission can persist for more than 5 h. The decay of the red afterglow follows nearly the same kinetics as that of the blue one. Continuous color tuning can be successfully obtained by simply changing the mass ratio of the donor/conversion phosphor pair. This color conversion strategy may be significant in indicating numerous persistent/conversion nanocomposites or nanostructures and advance the development of persistent phosphors in diverse fields which need colorful spectral properties.
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