Simultaneous enhancement in light absorption and charge transportation of bismuth vanadate (BiVO4) photoanode via microwave annealing

Javad Safaei, Nurul Aida Mohamed, Mohamad Firdaus Mohamad Noh, Mohd Fairuz Soh, A. M. Elbreki, Norasikin Ahmad Ludin, Mohd. Adib Ibrahim, Ali H.A. Al-Waeli, Wan Isahak Wan Nor Roslam, Mohd Asri Mat Teridi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We report the crystallization of electrodeposited BiVO4 photoanode by deploying conventional furnace annealing and hybrid microwave annealing, with the latter proving to possess higher crystallinity, charge carrier mobility, light absorption and conduction band level. The crystallization of BiVO4 was improved by microwave annealing, yielding higher charge carrier density. Higher morphological compactness and crystallinity for microwave annealed sample enhanced its light absorption properties. The smaller crystallite sizes upon microwave annealing resulted in band gap augmentation due to quantum confinement effect and manifested itself in its more elevated conduction band. The enhanced intrinsic properties of BiVO4 increased photoelectrochemical performance of microwave annealed sample by approximately two times compared with that of furnace annealed sample. The ultrafast synthesis as well as the possibilities of morphological, optical and electronics tunability motivates further research into devices and photoelectrodes based on microwave-annealed BiVO4.

Original languageEnglish
Pages (from-to)67-70
Number of pages4
JournalMaterials Letters
Volume233
DOIs
Publication statusPublished - 15 Dec 2018

Fingerprint

Transportation charges
vanadates
electromagnetic absorption
Bismuth
Light absorption
bismuth
Microwaves
Annealing
microwaves
annealing
augmentation
Crystallization
Conduction bands
Charge carriers
furnaces
charge carriers
crystallinity
conduction bands
Furnaces
crystallization

Keywords

  • Charge carrier mobility
  • Electrodeposition
  • Light absorption
  • Microwave annealing
  • Photoelectrochemical water splitting
  • Thin film

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Simultaneous enhancement in light absorption and charge transportation of bismuth vanadate (BiVO4) photoanode via microwave annealing. / Safaei, Javad; Mohamed, Nurul Aida; Noh, Mohamad Firdaus Mohamad; Soh, Mohd Fairuz; Elbreki, A. M.; Ahmad Ludin, Norasikin; Ibrahim, Mohd. Adib; Al-Waeli, Ali H.A.; Wan Nor Roslam, Wan Isahak; Mat Teridi, Mohd Asri.

In: Materials Letters, Vol. 233, 15.12.2018, p. 67-70.

Research output: Contribution to journalArticle

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AU - Soh, Mohd Fairuz

AU - Elbreki, A. M.

AU - Ahmad Ludin, Norasikin

AU - Ibrahim, Mohd. Adib

AU - Al-Waeli, Ali H.A.

AU - Wan Nor Roslam, Wan Isahak

AU - Mat Teridi, Mohd Asri

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AB - We report the crystallization of electrodeposited BiVO4 photoanode by deploying conventional furnace annealing and hybrid microwave annealing, with the latter proving to possess higher crystallinity, charge carrier mobility, light absorption and conduction band level. The crystallization of BiVO4 was improved by microwave annealing, yielding higher charge carrier density. Higher morphological compactness and crystallinity for microwave annealed sample enhanced its light absorption properties. The smaller crystallite sizes upon microwave annealing resulted in band gap augmentation due to quantum confinement effect and manifested itself in its more elevated conduction band. The enhanced intrinsic properties of BiVO4 increased photoelectrochemical performance of microwave annealed sample by approximately two times compared with that of furnace annealed sample. The ultrafast synthesis as well as the possibilities of morphological, optical and electronics tunability motivates further research into devices and photoelectrodes based on microwave-annealed BiVO4.

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