Abstract
Abstract The optical absorption spectrum of CaYAIO4 single crystals codoped V4+ and Mg2+ comprised two intense bands at 330 nm and 430 nm and a weak band around 500 nm. Excitation with light at wavelength near 500 nm produced a broad emission band with the peak at 690 nm. The radiative center is assigned to V4+. The peak wavelength of this emission band shifted to longer wavelength with increasing the excitation wavelength. This result indicates that inhomogeneous broadening of the V4+ luminescence is caused by substitutional disorder on the Ca2+ and Y3+ sites in the host lattice.
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