the metallic Zn [11]. In these reports main investigation
concentrated on the ultraviolet (UV) emission and
yellow-green emission, only few reports were
published on violet light emission [12–14] and there
was no the report on single violet emission until now.
In this paper, we report a simple method for
achieving polycrystalline ZnO thin films with single
violet luminescent properties by the oxidation of
metallic Zn films above melting (419 8C) temperature.
In the room temperature PL spectra, we have
observed a strong about 413–424 nm violet emissions
without any accompanying the ultraviolet (UV)
emission and deep-level emission. We also discussed
the main defects responsible for single violet
emission of ZnO film by investigating the relationships
between the photoluminescence properties and
the XRD chart of the ZnO film formed under
different oxygen pressures