Spin coating immobilisation of c-n-tio2 co-doped nano catalyst on glass and application for photocatalysis or as electron transporting layer for perovskite solar cells

Emile Salomon Massima Mouele, Siphelo Ngqoloda, Sara Pescetelli, Aldo Di Carlo, Mihaela Dinu, Alina Vladescu, Anca Constantina Parau, Antonio Agresti, Mariana Braic, Christopher J. Arendse, Leslie Felicia Petrik

Research output: Contribution to journalArticlepeer-review

Abstract

Producing active thin films coated on supports resolves many issues of powder-based photo catalysis and energy harvesting. In this study, thin films of C-N-TiO2 were prepared by dynamic spin coating of C-N-TiO2 sol-gel on glass support. The effect of spin speed and sol gel precursor to solvent volume ratio on the film thickness was investigated. The C-N-TiO2-coated glass was annealed at 350 °C at a ramping rate of 10 °C/min with a holding time of 2 hours under a continuous flow of dry N2. The C-N-TiO2 films were characterised by profilometry analysis, light microscopy (LM), and scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS). The outcomes of this study proved that a spin coating technique followed by an annealing process to stabilise the layer could be used for immobilisation of the photo catalyst on glass. The exposure of C-N-TiO2 films to UV radiation induced photocatalytic decolouration of orange II (O.II) dye. The prepared C-N-TiO2 films showed a reasonable power conversion efficiency average (PCE of 9%) with respect to the reference device (15%). The study offers a feasible route for the engineering of C-N-TiO2 films applicable to wastewater remediation processes and energy harvesting in solar cell technologies.

Original languageEnglish
Article number1029
Pages (from-to)1-24
Number of pages24
JournalCoatings
Volume10
Issue number11
DOIs
Publication statusPublished - Nov 2020

Keywords

  • Energy harvesting
  • Film thickness
  • Immobilisation
  • Perovskite solar cells
  • Photocatalytic decolouration
  • Spin coating
  • Thin film

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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