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ZnS:Mn nanoparticles were synthesized by co-precipitation method from the precursors solutions of 0.1M Zn(CH3COO)2, Na2S and Mn(CH3COO)2 then were capped with polyvinyl pyrrolidone. The XRD patterns showed that the ZnS:Mn nanoparticles possessed the T 2 d −F43̄m cubic structure with the average crystallite size of several nanometers. At 300 K, the obtained photoluminescence spectra showed only a wide yellow-orange band centered at 603 nm, which should be attributed to the radiation transition of [T1(G)→A1(S)] of Mn2+(3d5) cations in the ZnS matrix. The excitation spectra recorded at 300 K on the other hand featured a strong photoluminescence band around 344 nm, which were assigned to the near band-edge absorption transition of ZnS host lattice, in addition with three weaker bands relating to the absorption transitions of [A1(S)→ T2(D)]: 430 nm, [A1(S)→ A1(G) – 4E(4G)]: 468 nm, and [A1(S)→ T2(G)]: 492 nm of Mn2+(3d5) cations. It was shown that the capping affected only the intensities of emissions bands.

Influence of Polyvinyl Pyrrolidone on Absorption and Radiation Transitions of Mn\(^{2 + }\) ions in Mn-doped ZnS Nanoparticles