Photoluminescence of Praseodymium-Doped Srn+1TinO3n+1 ($n=1$, 2, $\infty$)

概要

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Perovskite-related compounds, Srn+1TinO3n+1: Pr3+ ($n=1$, 2, $\infty$), were prepared by a Pechini-type polymerizable complex method using a citric metal complex and their photoluminescence properties were investigated. The photoluminescence spectra of these compounds show distinct peaks at approximately 490 nm and/or 610 nm, which correspond to the intra-4f transitions from the excited state 3P0 to the ground state 3H4, 1D2 to 3H4 of Pr3+, respectively. The excitation process is consistent with the transition between the valence band and the conduction band in host materials. The most intense red emission was observed for the compound with $n=2$ (Sr3Ti2O7: Pr3+), following by the compounds, $n=1$ and $n=\infty$. The differences in luminescent properties among the compounds originate from the structural dependence of the energy transfer from the host to the activator Pr3+, and the site symmetry of Pr3+.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2005-01-15