Synthesis, structure and photoelectrochemical performance of micro/nano-textured ZnO/eosin Y electrodes

Eiji Hosono, Shinobu Fujihara, Toshio Kimura

Research output: Contribution to journalArticlepeer-review

119 Citations (Scopus)


Micro/nano-textured ZnO thick films were synthesized through deposition and pyrolysis of layered hydroxide zinc acetate (LHZA), Zn5(OH) 8(CH3COO)2·2H2O. LHZA films having a unique, rose-like morphology were initially deposited on conducting glass sheets in a chemical bath composed of methanol and zinc acetate dihydrate at 60°C under neutral conditions. Pyrolysis of the LHZA films resulted in formation of ZnO without destroying the original morphology. Pyrolysis temperatures were found to greatly influence grain sizes and specific surface areas of the ZnO films. Photoelectrochemical performance of the films as ZnO/eosin Y electrodes was investigated in dye-sensitized solar cells using an I-/I3- redox electrolyte solution. The cell using the ZnO film pyrolyzed at 150°C exhibited overall light to electricity conversion efficiencies of 2.0 and 3.3% under an AM-1.5 illumination at 100 and 10 mWcm-2, respectively. While microscale pores in the electrodes facilitated mass transfer of fluid electrolytes in the depth direction, nanoscale pores contributed to an increase in the amount of adsorbed dye. The maximum incident photon-to-current conversion efficiency (IPCE) of the electrode reached 84.9% at a wavelength of 530 nm.

Original languageEnglish
Pages (from-to)2287-2293
Number of pages7
JournalElectrochimica Acta
Issue number14
Publication statusPublished - 2004 Jun 15


  • Dye
  • Electrodes
  • Solar cell
  • ZnO

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry


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