Optical Absorption Spectra in CuAlS₂Doped with Vanadium

Abstract

Optical absorption spectra were measured at room temperature in undoped and V-doped single crystals of CuAlS 2 grown by the chemical vapour transport technique. Intense absorption bands characteristic of vanadium have been observed. These bands were attributed to the d-d type transitions between 3d-originated orbitals of V 3+ ion as well as to the charge-transfer type transitions from the valence band of the host crystal to the 3d-shell orbitals of V 3+ ion.