Enhanced charge transfer activity in Au nanoparticles decorated ZnO nanorods photoanode

Iwantono Iwantono, Siti Khatijah Md Saad, Fera Anggelina, Awitdrus Awitdrus, Muhamad Adam Ramli, Ali Umar Akrajas

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Charge-transfer and photoactivity at an interface of a photoactive materials, such as ZnO, is critically influence the performance of dye-sensitized solar cell (DSSCs). The performance of DSSCs utilizing Au decorated ZnO nanorod photoanode with Au nanoparticles grown at seven different growth times from 0.12 up to 6 min were studied. It was found that the charge transfer characteristic of DSSCs devices utilizing Au decorated ZnO nanorods increased with the increasing of Au nanoparticles size and density and optimum at Au nanoparticles size of ca. 15 nm and density of approximately 4–10 nanoparticles/nanorods. At this condition, the charge transfer resistance as low as 7.4 Ω was recorded. This is equivalent to power conversion efficiency of 1.11%. The charge transfer resistance gradually declined when the growth time further elongated. The efficient charge transfer can be associated to the excellent catalytic properties of Au nanoparticles on ZnO nanorods. This also improves its carrier transport in the device as judged from significantly low dark current properties. The improvement of light absorption can also be considered to improve the performance, attributed to the surface plasmon resonance (SPR) effect of the gold nanoparticles. The preparation of Au nanoparticles decorated ZnO nanorods and the mechanism of charge transfer characteristics will be discussed.

Original languageEnglish
Pages (from-to)44-50
Number of pages7
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume111
DOIs
Publication statusPublished - 1 Jul 2019

Fingerprint

Nanorods
nanorods
Charge transfer
Thermodynamic properties
charge transfer
Nanoparticles
nanoparticles
solar cells
dyes
Carrier transport
Dark currents
Surface plasmon resonance
electromagnetic absorption
dark current
surface plasmon resonance
Gold
Light absorption
Conversion efficiency
gold
preparation

Keywords

  • Au decorated ZnO
  • Charge transfer
  • DSSCs
  • Photoactivity
  • Power conversion efficiency

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Cite this

Enhanced charge transfer activity in Au nanoparticles decorated ZnO nanorods photoanode. / Iwantono, Iwantono; Md Saad, Siti Khatijah; Anggelina, Fera; Awitdrus, Awitdrus; Ramli, Muhamad Adam; Akrajas, Ali Umar.

In: Physica E: Low-Dimensional Systems and Nanostructures, Vol. 111, 01.07.2019, p. 44-50.

Research output: Contribution to journalArticle

Iwantono, Iwantono ; Md Saad, Siti Khatijah ; Anggelina, Fera ; Awitdrus, Awitdrus ; Ramli, Muhamad Adam ; Akrajas, Ali Umar. / Enhanced charge transfer activity in Au nanoparticles decorated ZnO nanorods photoanode. In: Physica E: Low-Dimensional Systems and Nanostructures. 2019 ; Vol. 111. pp. 44-50.
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