Novel optical property of SrZrO3 by Cu-ion doping

초록

We investigated the electronic structure of newly-synthesized Cu-ion-doped SrZrO3 by using photoluminescence and optical spectroscopic techniques. We found that the Cu-ion doping gave rise to the formation of a mid-gap state as deep acceptor within the fundamental bandgap of SrZrO3, which was responsible for red and green emissions. The two-peak structure of the visible emission in our samples was compared with the emission spectra of transition-metal ion-doped semiconductors such as group II-VI and ZnO. The mid-gap state of the Cu 3d orbitals was also identified in the absorption spectra. We suggest a schematic picture for the electronic states of Cu-ion-doped SrZrO3.

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