Facile synthesis of highly branched jacks-like ZnO nanorods and their applications in dye-sensitized solar cells

P. Sudhagar, R. Saravana Kumar, June Hyuk Jung, Woohyung Cho, R. Sathyamoorthy, Jongok Won, Yong Soo Kang

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

Highly branched, jacks-like ZnO nanorods architecture were explored as a photoanode in dye-sensitized solar cells, and their photovoltaic performance was compared with that of branch-free ZnO nanorods photoanodes. The highly branched network and large pores of the jacks-like ZnO nanorods electrodes enhances the charge transport, and electrolyte penetration. Thus, the jacks-like ZnO nanorods DSSCs render a higher conversion efficiency of η = 1.82% (Voc = 0.59 V, Jsc = 5.52 mA cm-2) than that of the branch-free ZnO nanorods electrodes (η = 1.08%, Voc = 0.49 V, Jsc = 4.02 mA cm-2). The incident photon-to-current conversion efficiency measurements reveal that the jacks-like ZnO nanorods DSSCs exhibit higher internal quantum efficiency (∼59.1%) than do the branch-free ZnO nanorods DSSC (∼52.5%). The charge transfer resistances at the ZnO/dye/electrolyte interfaces investigated using electrochemical impedance spectroscopy showed that the jacks-like ZnO nanorods DSSC had high charge transfer resistance and a slightly longer electron lifetime, thus improving the solar-cell performance.

Original languageEnglish
Pages (from-to)1473-1479
Number of pages7
JournalMaterials Research Bulletin
Volume46
Issue number9
DOIs
Publication statusPublished - Sep 2011

Keywords

  • A. Nanostructures
  • A. Oxides
  • B. Chemical synthesis
  • C. Electron microscopy
  • C. X-ray diffraction

ASJC Scopus subject areas

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

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