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    Sunlight-excited infrared long persistence of SrAl2O4: Eu2+, Dy3+, Er3+/ Nd3+ nanophosphors

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    Date
    2008-08
    Author
    Yu, Naiyin
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    Abstract
    Strontium aluminate co-doped with divalent europium, trivalent dysprosium ions 2+3+(SrAl2O4: Eu, Dy) shows a green demonstrated long persistence lasting for up to 15 hours 3+3+under sunlight excitation. The research presented in this thesis focus on the Er/ Nd activated 2+infrared (IR) long persistence due to the persistent energy transfer process in SrAl2O4: Eu, 3+3+3+Dy, Er/ Nd nanophosphor system. The XRD, SEM, EDX and optical spectra analysis method are employed to characterize the phosphors synthesized by combustion route. The 2+3+3+efficient energy transfer process from sensitizer Eu to the activator Er/ Nd in SrAl2O4 host system is investigated. Meanwhile, the long persistence luminescence in IR region is obtained. To our knowledge, there is no related material system regarding sunlight-excited infrared long persistence nanophosphor reported. 2+3+3+3+
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    http://purl.galileo.usg.edu/uga_etd/yu_naiyin_200808_ms
    http://hdl.handle.net/10724/25098
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    • University of Georgia Theses and Dissertations

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