A new emission of ZnS:Ni2+ arising from the 3T1(P) → 3T1(F) transition

Abstract A photoluminescence band with zero-phonon transitions at ⋎ = 12438 cm -1 (this one subject to self-absorption) and at 12259 cm -1 has been detected with ZnS:Ni crystals. Based on the appearance of these two lines, on the similarity of the whole spectrum with the 3 T 2 (F) → 3 T 1 (F) Ni 2+ luminescence, and on preparation evidence, this new emission is interpreted as the 3 T 1 (P) → 3 T 1 (F) transition of substitutional Ni 2+ (3d 8 ) ions in a tetrahedral crystal field.