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http://dx.doi.org/10.9714/psac.2015.17.4.008

Study on visible emission of Cu-ion-doped perovskite hafnate in view of excitation energy dependence  

Lee, D.J. (Soongnsil University)
Lee, Y.S. (Soongnsil University)
Noh, H.J. (Chonnam National University)
Publication Information
Progress in Superconductivity and Cryogenics / v.17, no.4, 2015 , pp. 8-11 More about this Journal
Abstract
We studied on the visible emission of Cu-ion-doped perovskite hafnate $SrHfO_3$ (SHO:Cu) with the photo-excitation energy dependence. The polycrystalline SHO:Cu samples were newly synthesized in the solid state reaction method. From the X-ray diffraction measurement it was found that the crystalline structure of SHO:Cu is nearly identical to that of undoped $SrHfO_3$. Interestingly, the photoluminescence excitation (PLE) spectra change significantly with the emission energy, which is linked to the strong dependence of the visible emission on the photo-excitation energy. This unusual emission behavior is likely to be associated with the mixed valence states of the doped Cu ions, which were revealed by X-ray photoelectron spectroscopy. We compared our finding of tunable visible emission in the SHO:Cu compounds with the cases of similar materials, $SrTiO_3$ and $SrZrO_3$ with Cu-ion-doping.
Keywords
Visible emission; Cu-ion doping; $SrHfO_3$; Photoluminescence;
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