Energy levels scheme for K2SiF6:Mn4+ nanophosphor
Pages 118-123
R. Nistora, S. Ivascu, C. N. Avram
Abstract. Luminescent materials using manganese ion as activator have become popular due their superb properties. The energy level structure of this ion can be well described by the standard crystal field theory. The objective of this paper is to report on detailed crystal field calculation of the Mn4+ energy levels in order to give a reliable explanation for experimental data. The parameters of the crystal field acting on the Mn4+ ion are calculated in the frame of Exchange Charge Model, from the crystal structure data. With these parameters we have been diagonalized the crystal field Hamiltonian. The obtained energy level schemes were compared with experimental data, and a good agreement is demonstrated.