Effect of temperature photoluminescence properties of ZrO₂

Full text: This work describes the photoluminescence (PL) of zirconium oxide (ZrO₂) particles synthesized using the complex polymerization method (CPM). They were characterized by X-ray diffraction (XRD) and photoluminescence measurements (PL). Photoluminescence (PL) is a principal process in photochemistry and, recently, the PL properties of metal oxides have attracted great interest. However, reports on the PL properties of particles ZrO₂, especially on the UV-blue PL properties, have been rarely found. The XRD result shows a stabilization of the tetragonal phase of ZrO₂. PL emission spectra were also recorded and are investigated. When the material was excited by wavelengths 350 nm, emission bands are observed in the range of 360-760 nm. Observed was a shift to the left with increasing treatment temperature. According to the ZrO₂ emission spectra calcined at 400°C and 500°C show blue emission and the sample treated at 600 ° C emits green. The electronic transitions that occur between the valence band and the conduction band of ZrO₂ are type (O2-) p → d (Zr/'4⁺), which generated by a non-radiative sequence relaxations of localized electrons in the conduction band to band recombination within the 'band gap' and subsequently decreasing to the valence band. The ZrO₂ material showed blue and green photoluminescence with high intensity. (author)