Deep yellow emission and high energy device applications of copper doped orthorhombic zirconium titanate nanoparticles

For the first time, Zirconium titanate doped with copper (1-9 mol %) was synthesized by an aloe vera-mediated combustion route followed by calcination at 700oC. The high crystallinity and pure ortho-rhombic structure are confirmed through Bragg reflections. The surface morphology consists of larger particles along with agglomeration. The lattice d-spacings and selected area electron diffraction patterns confirm the purity of the sample. The crystallite size increases, whereas the energy band gap determined from Wood and Tauc's relationship decreases. The photoluminescence analysis excited at 471 nm and the Commission Internationale de L'Eclairage (CIE) and color-correlated temperature (CCT) values confirmed that the synthesized sample is a promising candidate for display technology as a yellow nanophosphor. The cyclic voltammetry analysis is performed on the oxidation and redox peaks. Electrochemical impedance spectroscopy (EIS) revealed the ion transport kinetics and supercapacitance values obtained from galvanostatic charge/discharge (GCD) analysis. Specific capacitance values are found to be in the range 290-350 F/g for ZTO:Cu (1-9 mol %) nanoparticles (NPs), respectively. Thus, the present syn-thesized material might find applications in the fields of display technology and energy storage materials.& COPY; 2023 Elsevier Ltd. All rights reserved.