Photoelectrochemical properties of texture-controlled nanostructured α-Fe2O3 thin films prepared by AACVD

Asif Ali Tahir, Mohd Asri Mat Teridi, K. G Upul Wijayantha

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Nanostructured α-Fe2O3 thin film electrodes were deposited by aerosol-assisted chemical vapour deposition (AACVD) for photoelectrochemical (PEC) water splitting on conducting glass substrates using 0.1 M methanolic solution of Fe(acac)3. The XRD analysis confirmed that the films are highly crystalline α-Fe2O3 and free from other iron oxide phases. The highly reproducible electrodes have an optical bandgap of ~2.15 eV and exhibit anodic photocurrent. The current-voltage characterization of the electrodes reveals that the photocurrent density strongly depended on the film morphology and deposition temperature. Scanning electron microscopy (SEM) analysis showed a change in the surface morphology with the change in deposition temperature. The films deposited at 450 °C have nanoporous structures which provide a maximum electrode/electrolyte interface. The maximum photocurrent density of 455 μA/cm2 was achieved at 0.25 V vs. Ag/AgCl/3M KCl (~1.23 V vs. RHE) and the incident photon to electron conversion efficiency (IPCE) was 23.6% at 350 nm for the electrode deposited at 450 °C.

Original languageEnglish
Pages (from-to)976-981
Number of pages6
JournalPhysica Status Solidi - Rapid Research Letters
Volume8
Issue number12
DOIs
Publication statusPublished - 1 Dec 2014

Fingerprint

Aerosols
Chemical vapor deposition
aerosols
textures
Textures
vapor deposition
Thin films
Electrodes
Photocurrents
electrodes
photocurrents
thin films
water splitting
Optical band gaps
Iron oxides
iron oxides
Electrolytes
Conversion efficiency
Surface morphology
Photons

Keywords

  • Aerosol assisted chemical vapour deposition
  • FeO
  • Photoelectrochemical water splitting
  • Thin films

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Science(all)

Cite this

Photoelectrochemical properties of texture-controlled nanostructured α-Fe2O3 thin films prepared by AACVD. / Tahir, Asif Ali; Mat Teridi, Mohd Asri; Wijayantha, K. G Upul.

In: Physica Status Solidi - Rapid Research Letters, Vol. 8, No. 12, 01.12.2014, p. 976-981.

Research output: Contribution to journalArticle

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