Microwave assisted solvothermal synthesis of quasi cubic F doped TiO₂ nanostructures and its performance as dye sensitized solar cell photoanode

Abstract

By the process of doping in semiconducting nanomaterials, properties of the materials such as electronic, optical and photochemical properties can be effectively tuned. Here fluorine doped TiO 2 nanostructures were synthesized by microwave assisted solvothermal technique. The X-ray diffraction patterns (XRD) and Raman analysis results of the sample exhibits peaks characteristic of anatase TiO 2 . From the UV-visible absorption analysis, an increase in visible light absorption with no significant change in the absorption edge was noticed. F doped TiO 2 nanostructures were found to possess quasi cubic morphology through the transmission electron microscope images and from the presence of well-defined ring pattern in selected area electron diffraction patterns the polycrystalline nature of the samples were confirmed. The presence of fluorine in the TiO 2 lattice was confirmed through the presence of Ti 3+ states using Xray photoelectron spectroscopy (XPS) analysis and electron paramagnetic resonance (EPR) analysis respectively. The prepared TiO 2 , F doped TiO 2 nanostructures were coated over fluorine doped tin oxide (FTO) substrates, further they were subjected to dye sensitization and were used as photoanodes in dye sensitized solar cells and their power conversion efficiencies were studied. K E Y W O R D Sanatase TiO 2 , dye-sensitized solar cell, microwave assisted synthesis, polyvinylidene fluoride, Ti 3+ states

Opportunities from Doping of Non‐Critical Metal Oxides in Last Generation Light‐Conversion Devices

“…Increasing the energy of the CB holds promise of increased U oc (Figure 10) as seen in TiO 2 doped with Zr, Nb, W, other metal cations or fluoride anions. [175][176][177] The conductivity of TiO 2 could also be increased by doping with Ga or Y. [178] Most of these modifications led to increased efficiencies above those of undoped reference TiO 2 , but could not reach the efficiency of state-of-the-art TiO 2 cells, presumably because of undesired consequences on film morphology and surface reactivity, which hindered persistent improvements beyond the state-of-the-art.…”

Bio-fabrication of TiO2 Nanomaterials and Their Applications in Electronics Devices

“…71 Modifications of the TiO 2 -based photoelectrode used in DSSCs have also been carried out with aggregated microspheres, 72 nanosheet spheres, 73 reduced graphene oxide composites, 74 and quasi-cubic fluorine. 75 Quantum dot sensitized solar cells (QDSSCs) have also gained popularity in recent years. Quantum dots (QDs) with large intrinsic dipole moments, quantum confinement and, consequently, large extinction coefficients exhibit rapid charge separation.…”

Fabrication of TiO2 based Dye-Sensitized Solar Cell using Nerium oleander as a sensitizer

“…For a photoanode material in DSSC, the metal oxide semiconductors like TiO2, ZnO, SnO2, NiO and Nb2O5 were used due to their large bandgap [4]. Because of its high dye loading 1263 (2022) 012018 IOP Publishing doi:10.1088/1757-899X/1263/1/012018 2 capacity, good chemical stability and non-toxicity, TiO2 was picked as a photoanode material [7,8]. According to studies, the doping of TiO 2 with rare-earth elements enhanced its characteristics.…”