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ZnS: MnF 2 phosphors and their references were investigated with X-ray photoelectron spectroscopy. The atomic ratio of F to Mn in ZnS: MnF 2 was found to be remarkably lower than that in MnF 2 film. The binding energy of Mn2p 3/2 in ZnS: MnF 2 is near that in β-MnS and ZnS doped with Mn atoms by heat-treatment. It is concluded that most Mn atoms in ZnS: MnF 2 are not in the MnF 2 molecules, but replace Zn atoms. This fact is also discussed on the basis of self lattice potential energy.
Akira Aoki (1976) studied this question.