Tuning of photoluminescence of Sr(Zr,Hf)O3:Cu by using the photo-excitation energy

Abstract

We investigated the visible emission of Cu-ion-doped Sr(Zr,Hf)O3 at various photo-excition energies. In the Cu-ion-doped SrZrO3 (SZO:Cu), the peak position of the visible emission changed from 400 nm (violet) to 600 nm (yellow) as the photo-excitation wavelength was tuned from 220 nm to 375 nm. This tunable multicolor behavior depended on the concentration of the Cu-ion doping. The Cu-ion-doped SrHfO3 (SHO:Cu) show optical properties similar to those of SZO:Cu. For a qualitative analysis, we calculated the CIE chromaticity coordinates of our samples. Our results suggest that the tunable multicolor emission in SZO:Cu and SHO:Cu can be utilized for ultraviolet sensors.