Dense TiO₂ films grown by sol–gel dip coating on glass, F-doped SnO₂, and silicon substrates

Abstract

Abstract

Sol–Gel Titanium Dioxide Blocking Layers for Dye‐Sensitized Solar Cells: Electrochemical Characterization

“…< 20 from the Kr adsorption isotherms. [26] We should note, however, that AFM does not seem to be a reliable method for the determination of r.f., which is 'seen' by electrochemistry in our SG films. To illustrate this statement, we have repeated and upgraded the evaluation of the AFM data of our sol-gel film (Figure 2 b in Ref.…”

“…The films were typically 40-60 nm thick in accord with the earlier work. [26] The X-ray diffractograms were measured on the actual FTO-supported electrodes. Consequently, the patterns are dominated by the diffraction lines of SnO 2 (rutile).…”

“…Although the solgel and (supra)molecular templating do not seem to be the right strategies towards compact layers (because they provide typically highly porous, nanocrystalline layers [25] ), we have recently found an exception to this rule. [26] In this work, dense TiO 2 films were grown on FTO and other surfaces via dip-coating from a sol containing poly(hexafluorobutyl methacrylate) (PHFM) as the structure-directing agent. [26] Here, we present an electrochemical study, showing that the films grown with the aid of PHFM or the corresponding monomer (hexafluorobutyl methacrylate, HFM), provide excellent rectifying interface for charge-transfer reactions of model redox probes.…”

“…[26] In this work, dense TiO 2 films were grown on FTO and other surfaces via dip-coating from a sol containing poly(hexafluorobutyl methacrylate) (PHFM) as the structure-directing agent. [26] Here, we present an electrochemical study, showing that the films grown with the aid of PHFM or the corresponding monomer (hexafluorobutyl methacrylate, HFM), provide excellent rectifying interface for charge-transfer reactions of model redox probes. The optimized films exhibit good blocking function of the FTO surface, outperforming the performance of reference layers made by spray pyrolysis.…”

Enhanced photocatalytic activities of TiO2–SiO2 nanohybrids immobilized on cement-based materials for dye degradation

“…Among them, the sol-gel process is the most important method due to its simplicity, low-cost, and controlled process condition [37]. This includes dip coating, spin coating, spray coating and paint coating [38][39][40]. To enhance the activity of TiO 2 , a substrate with large surface area and high porosity is required.…”