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Issue 13, 2017
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Composites of BaAl2O4:Eu2+,Dy3+/organic dye encapsulated in mesoporous silica as multicolor long persistent phosphors based on radiative energy transfer

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Abstract

A multicolor BaAl2O4:Eu2+,Dy3+/dye encapsulated in mesoporous SiO2 composite long persistent phosphor is developed based on a radiative energy transfer process. Multicolor long persistence luminescence is achieved through radiative energy transfer from BaAl2O4:Eu2+,Dy3+ to rhodamine 6G or rhodamine B dye encapsulated in mesoporous silica nanoparticles. BaAl2O4:Eu2+,Dy3+ (BAO) is a cyan-emitting long persistent phosphor with high brightness and a long afterglow time. For color tuning, rhodamine 6G dye encapsulated in mesoporous silica (MSNP-Rh6G) or rhodamine B dye encapsulated in mesoporous silica (MSNP-RhB) nanoparticles are mixed with BAO phosphor in different weight ratios to afford BAO/MSNP-Rh6G and BAO/MSNP-RhB composite phosphors. BAO/MSNP-Rh6G shows a long persistent emission with colors varying from cyan to yellow, with similar color tuning observed for BAO/MSNP-RhB. A possible afterglow mechanism is described. The multicolor long persistent phosphors are potentially applicable in displays, bio-imaging, and luminous paints.

Graphical abstract: Composites of BaAl2O4:Eu2+,Dy3+/organic dye encapsulated in mesoporous silica as multicolor long persistent phosphors based on radiative energy transfer

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Publication details

The article was received on 18 Jan 2017, accepted on 27 May 2017 and first published on 29 May 2017


Article type: Paper
DOI: 10.1039/C7NJ00209B
Citation: New J. Chem., 2017,41, 5934-5941
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    Composites of BaAl2O4:Eu2+,Dy3+/organic dye encapsulated in mesoporous silica as multicolor long persistent phosphors based on radiative energy transfer

    S. Das, J. Manam and S. K. Sharma, New J. Chem., 2017, 41, 5934
    DOI: 10.1039/C7NJ00209B

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