High energy devices and display technology applications of silver doped zirconium titanate nanoparticles

Abstract

For the first of its kind, Silver activated (1–9 mol%) Zirconium Titanate nanoparticles (NPs) have been synthesized by green solution combustion method using AloeV era gel extract as a reducing agent followed by calcination at 720 °C for 3 h. All the synthesized samples crystallizes in orthorhombic crystal structure with the space group of Pbcn. Initially a less intense peak corresponding to monoclinic ZrO2 phase is observed up to 7 mol% and thereafter it diminishes at 9 mol%. The surface and bulk morphology were analyzed. The crystallite size increases whereas the direct energy band gap was found to decrease with increase in dopant concentration. Further, the effect of dopant concentration on photoluminescence and electrochemical properties were studied. The PL spectra show a single broad emission peak at 440 nm along with a satellite peak at 466 nm. These peaks appearing in the case of Ag-doped ZTO corresponds to the radiative transition of the excited electrons from occupied d bands to higher states of the Fermi level. The CIE and CCT coordinates imply that the present nanophosphor can be employed as a blue emitting phosphor material in display technology. The cyclic voltammetry analysis is performed for oxidation and redox peaks. EIS revealed the ion transport kinetics and Super capacitance values were obtained from GCD analysis. Specific capacitance values were found to be in the range 279 to 329 F/g for ZTO:Ag (1 to 9 mol%) NPs respectively. Thus, the present synthesized material might find applications in the field of display technology as well as in energy storage materials.