Morphological and electron mobility studies in nanograss In2O3 DSSC incorporating multi-walled carbon nanotubes

S. Mahalingam, Huda Abdullah, S. Shaari, Andanastuti Muchtar

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In2O3and In2O3-MWCNTs, thin films were prepared by means of sol-gel spin coating technique for dye-sensitized solar cells (DSSCs). The morphological characteristics of In2O3 and In2O3-MWCNT thin films were studied via atomic force microscopy (AFM) and field emission scanning electron microscopy (FESEM). The porous and rough surface structure of nanograss In2O3 increased the surface area for improved dye loading. The low photovoltage issue in In2O3-based DSSCs was addressed by the incorporation of MWCNTs. The bandgap decreased when In2O3 was incorporated with MWCNTs. The presence of MWCNTs in the thin film caused the fermi level (EF) to shift upward and this leads to a larger energy gap between EF and the iodine redox level (EREDOX) that results in higher photovoltage. The In2O3-MWCNT-based DSSCs exhibited better photovoltaic performance than In2O3-based DSSC with photovoltaic efficiency of 1.29 and 0.14 %, respectively. The electrochemical impedance spectroscopy (EIS unit) supported the photovoltaic performance by quantifying that the In2O3-MWCNT thin films provide more efficient charge transfer with the lowest effective recombination rate and high electron lifetime, hence improving the performance of DSSCs.

Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalIonics
DOIs
Publication statusAccepted/In press - 5 May 2016

Fingerprint

Carbon Nanotubes
Electron mobility
electron mobility
Carbon nanotubes
solar cells
dyes
carbon nanotubes
Thin films
photovoltages
thin films
Energy gap
Coating techniques
Spin coating
Fermi level
Iodine
Electrochemical impedance spectroscopy
Surface structure
Field emission
Sol-gels
Charge transfer

Keywords

  • Efficiency
  • Electron mobility
  • InO-MWCNTs
  • Morphological
  • Nanograss

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Morphological and electron mobility studies in nanograss In2O3 DSSC incorporating multi-walled carbon nanotubes. / Mahalingam, S.; Abdullah, Huda; Shaari, S.; Muchtar, Andanastuti.

In: Ionics, 05.05.2016, p. 1-13.

Research output: Contribution to journalArticle

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