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A Study of Energy Transfer in the Blue Emitting Fluorescence of SrAl12O19:Ce0.093+, Eu0.012+ Phosphor  

Kim, Gwang Chul (Physics Department, School of Liberal Arts, KOREATECH)
Choi, Jin Soo (Agency for Defence Development)
Publication Information
Journal of the Semiconductor & Display Technology / v.18, no.1, 2019 , pp. 48-52 More about this Journal
Abstract
The blue emitting fluorescence of $SrAl_{12}O_{19}:Ce_{0.09}{^{3+}}$, $Eu_{0.01}{^{2+}}$ phosphor includes two kinds of independent energy transfer mechanism through electric multipole interactions between donor and acceptor ions. The first energy transfer takes place between the $Ce^{3+}$ ion and the $Eu^{2+}$ion which strongly depends on the concentration $Eu^{2+}$ions. The second energy transfer occurs between the $Ce^{3+}$ ion and the $O_{Me}-Ce^{3+}$ complexes. Both energy transfer mechanisms of blue emitting peak at 410 nm were investigated by fitting of Gaussian functions. The result shows that the peak at 410 nm is two overlapping emissions originated by $Eu^{2+}$ions and $O_{Me}-Ce^{3+}$ complexes and as time elapses $Eu^{2+}$peak remains whereas $O_{Me}-Ce^{3+}$ related peak disappears.
Keywords
Energy Transfer; Time-resolved PL Spectrum; Gaussian Function;
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