Synthesis of TiO2 nanorods with a microwave assisted solvothermal method and their application as dye-sensitized solar cells

Document Type: Original Research Paper

Authors

1 Department of Basic Sciences, Imam Reza International University, Mashhad, Iran

2 Department of Electrical Engineering, Imam Reza International University, Mashhad, Iran

10.22034/jna.2020.675050

Abstract

Inthiswork, Titanium dioxide (TiO2) nanostructures have beensynthesized via a
microwave assisted solvothermalmethod using titanium tetraisopropoxide (TTIP),
polyvinylpyrrolidone(PVP) and Ascorbic Acid (AA) in ethanol. The mole ratio of
PVP/AA was found to be critical in determining the morphology and crystal phase
of the final product. PVP/AA mole ratio varied from 1 up to 15 to obtain different
morphologies of TiO2. The structural analysis by XRD diffraction confirmed
formation of titanium dioxide. The Williamson-Hall (W-H) analysis was used
to study the individual contributionsofcrystallite sizes and lattice strain on the
peak broadening of the TiO2 nanoparticles.FTIR spectrum was used to estimate
the various functional groups present in the nanostructures. Scanning electron
microscope (SEM) images demonstrate nanoparticle, short nanorod, and long
nanorods for 5,10 and 15 mole ratio of PVP/AA respectively. TiO2 nanoparticles
and nanorodshave been used as photoelectrode in dye-synthesized solar cell
(DSSCs) fabrication. The efficiencies of solar cells were calculated 3.23%and
4.01% for nanoparticles and nanorods, respectively.

Keywords