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Study on visible emission of Cu-ion-doped perovskite hafnate in view of excitation energy dependence
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 Title & Authors
Study on visible emission of Cu-ion-doped perovskite hafnate in view of excitation energy dependence
Lee, D.J.; Lee, Y.S.; Noh, H.J.;
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We studied on the visible emission of Cu-ion-doped perovskite hafnate (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 . 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, and with Cu-ion-doping.
Visible emission;Cu-ion doping;;Photoluminescence;
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