Fabrication of ZnO films consisting of densely accumulated mesoporous nanosheets and their dye-sensitized solar cell performance

Keita Kakiuchi, Masaru Saito, Shinobu Fujihara

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

Nanocrystalline and mesoporous ZnO films approximately 4 μm in thickness were fabricated through a simple chemical deposition of Zn4CO3(OH)6·H2O in an aqueous solution of zinc nitrate and urea and subsequent pyrolysis at a low temperature of 300 °C. Microscopic observation of the films revealed that they were composed of mesoporous nanosheets accumulating with submicrometer-order spacing between them on conducting glass substrates. Adsorption of N-719 dye onto the ZnO surface, for application to dye-sensitized solar cells, led to dye-loading of 1.1 × 10- 7 mol/cm2 in spite of the relatively small thickness. The resultant ZnO/N-719 photoanode exhibited a short-circuit photocurrent density of 13.8 mA/cm2, which is of the highest level ever reported for ZnO. An overall light-to-electricity conversion efficiency of 3.3% was achieved under 1 sun AM1.5 illumination without any optimization in view of the other cell components.

Original languageEnglish
Pages (from-to)2026-2030
Number of pages5
JournalThin Solid Films
Volume516
Issue number8
DOIs
Publication statusPublished - 2008 Feb 29

Fingerprint

Nanosheets
Coloring Agents
Dyes
solar cells
dyes
Fabrication
fabrication
Photocurrents
Urea
Short circuit currents
Sun
Conversion efficiency
Nitrates
Pyrolysis
Zinc
Electricity
Lighting
short circuits
electricity
ureas

Keywords

  • Nanostructures
  • Pyrolysis
  • Solar cells
  • Zinc oxide

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Fabrication of ZnO films consisting of densely accumulated mesoporous nanosheets and their dye-sensitized solar cell performance. / Kakiuchi, Keita; Saito, Masaru; Fujihara, Shinobu.

In: Thin Solid Films, Vol. 516, No. 8, 29.02.2008, p. 2026-2030.

Research output: Contribution to journalArticle

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