Optical absorption of NiPS3in the near-infrared, visible and near-ultraviolet regions

The optical absorption spectrum of NiPS 3 in the energy range (0-5.4 eV) has been measured at 300, 78 and 4.2 K. The features observed in the spectrum have been interpreted in terms of transitions between the Ni 2+ 3d levels and transitions between the S 3p x p y valence states and the Ni 2+ 3d e g empty states. The Dq and B parameters have also been estimated.