Preparation and luminescence properties of novel K2ZnP2O7: Mn2+ green phosphor

Review—Photoluminescence Spectroscopy of Mn2+-Activated Phosphors: Part I. Fundamentals

“…3 demonstrate that Mn 2+ luminescence provides an asymmetric emission band even when its ion is substituted for a single crystallographic site. However, Belbal et al 51 mentioned that Mn 2+ activator ion replacing a single crystallographic site should result in quite "symmetric" emission band that can be fit well with a "single" Gaussian lineshape. Otherwise, if Mn 2+ ion gives an asymmetric emission band that is adjustable to several Gaussian peaks more than one, this may indicate that Mn 2+ ion should occupy more than one crystallographic site in the host material.…”

“…It is generally accepted that when the activator ion, in the present study Mn 2+ ion, occupies a single crystallographic site, the corresponding emission band or peak should be quite symmetric and can be fit very well with a single Gaussian lineshape. 51 This consideration is basically wrong. Note that the activator ions in I).…”