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

Eiji Hosono; Shinobu Fujihara; Toshio Kimura

doi:10.1016/j.electacta.2004.01.009

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

Eiji Hosono, Shinobu Fujihara, Toshio Kimura

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

119 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	2287-2293
Number of pages	7
Journal	Electrochimica Acta
Volume	49
Issue number	14
DOIs	https://doi.org/10.1016/j.electacta.2004.01.009
Publication status	Published - 2004 Jun 15

Keywords

Dye
Electrodes
Solar cell
ZnO

ASJC Scopus subject areas

Chemical Engineering(all)
Electrochemistry

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10.1016/j.electacta.2004.01.009

Cite this

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

abstract = "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.",

keywords = "Dye, Electrodes, Solar cell, ZnO",

author = "Eiji Hosono and Shinobu Fujihara and Toshio Kimura",

note = "Funding Information: The authors thank Dr. H. Imai and Mr. H. Hayashi, Keio University, for help with the calibration of the Xe lamps. One of the authors (S. Fujihara) thanks Mizuho Foundation for the Promotion of Sciences for its encouragement and financial support. This work was also supported by Grant-in-Aid for the 21st century COE program “KEIO Life Conjugate Chemistry” from the Ministry of Education, Culture, Sports, Science, and Technology, Japan.",

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doi = "10.1016/j.electacta.2004.01.009",

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AU - Hosono, Eiji

AU - Fujihara, Shinobu

AU - Kimura, Toshio

N1 - Funding Information: The authors thank Dr. H. Imai and Mr. H. Hayashi, Keio University, for help with the calibration of the Xe lamps. One of the authors (S. Fujihara) thanks Mizuho Foundation for the Promotion of Sciences for its encouragement and financial support. This work was also supported by Grant-in-Aid for the 21st century COE program “KEIO Life Conjugate Chemistry” from the Ministry of Education, Culture, Sports, Science, and Technology, Japan.

PY - 2004/6/15

Y1 - 2004/6/15

N2 - 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.

AB - 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.

KW - Dye

KW - Electrodes

KW - Solar cell

KW - ZnO

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JF - Electrochimica Acta

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ER -

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

Abstract

Keywords

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