Photoinduced Electron Transfer from Excited Ruthenium Complexes at Nanocrystalline TiO2 Electrodes

Jong Hyun Bae; Donghwan Kim; Yeong Il Kim; Kang Jin Kim

Photoinduced Electron Transfer from Excited Ruthenium Complexes at Nanocrystalline TiO₂ Electrodes

Jong Hyun Bae, Donghwan Kim, Yeong Il Kim, Kang Jin Kim

Department of Materials Science and Engineering

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

7 Citations (Scopus)

Abstract

Photoinduced electron transfer from the charge-transfer excited states of Ru(tpy)(bpy(COOH)₂)CN⁺, Ru(tpy) (bpy(COOH)₂)Cl⁺, Ru(tpy)(bpy(COOH)₂) H₂O²⁺, and Ru(tpy)(bqu(COOH)₂)Cl⁺ to the conduction band of TiO₂ has been studied through photoelectrochemical methods. Ru(tpy)(bpy(COOH)₂) CN⁺ produced the highest current density and open-circuit photovoltage, whereas Ru(tpy)(bqu(COOH)₂)Cl⁺ produced the lowest values. A potential barrier was employed to explain the experimental result that the rate of the electron transfer increases with increasing the energy difference between the donor and acceptor. A sensitizer with a high current density yielded a high photovoltage and a high conversion efficiency. The reduction rate of the oxidized sensitizer decreased with the increases in the reduction potential of the sensitizer, resulting in a poor stability of a photoelectrochemical cell.

Original language	English
Pages (from-to)	567-572
Number of pages	6
Journal	Bulletin of the Korean Chemical Society
Volume	18
Issue number	6
Publication status	Published - 1997

ASJC Scopus subject areas

Chemistry(all)

Cite this

@article{1b88dd38bd2b48f7976be01f6df2c70b,

title = "Photoinduced Electron Transfer from Excited Ruthenium Complexes at Nanocrystalline TiO2 Electrodes",

abstract = "Photoinduced electron transfer from the charge-transfer excited states of Ru(tpy)(bpy(COOH)2)CN+, Ru(tpy) (bpy(COOH)2)Cl+, Ru(tpy)(bpy(COOH)2) H2O2+, and Ru(tpy)(bqu(COOH)2)Cl+ to the conduction band of TiO2 has been studied through photoelectrochemical methods. Ru(tpy)(bpy(COOH)2) CN+ produced the highest current density and open-circuit photovoltage, whereas Ru(tpy)(bqu(COOH)2)Cl+ produced the lowest values. A potential barrier was employed to explain the experimental result that the rate of the electron transfer increases with increasing the energy difference between the donor and acceptor. A sensitizer with a high current density yielded a high photovoltage and a high conversion efficiency. The reduction rate of the oxidized sensitizer decreased with the increases in the reduction potential of the sensitizer, resulting in a poor stability of a photoelectrochemical cell.",

author = "Bae, {Jong Hyun} and Donghwan Kim and Kim, {Yeong Il} and Kim, {Kang Jin}",

year = "1997",

language = "English",

volume = "18",

pages = "567--572",

journal = "Bulletin of the Korean Chemical Society",

issn = "0253-2964",

publisher = "Wiley-Blackwell",

number = "6",

}

TY - JOUR

T1 - Photoinduced Electron Transfer from Excited Ruthenium Complexes at Nanocrystalline TiO2 Electrodes

AU - Bae, Jong Hyun

AU - Kim, Donghwan

AU - Kim, Yeong Il

AU - Kim, Kang Jin

PY - 1997

Y1 - 1997

N2 - Photoinduced electron transfer from the charge-transfer excited states of Ru(tpy)(bpy(COOH)2)CN+, Ru(tpy) (bpy(COOH)2)Cl+, Ru(tpy)(bpy(COOH)2) H2O2+, and Ru(tpy)(bqu(COOH)2)Cl+ to the conduction band of TiO2 has been studied through photoelectrochemical methods. Ru(tpy)(bpy(COOH)2) CN+ produced the highest current density and open-circuit photovoltage, whereas Ru(tpy)(bqu(COOH)2)Cl+ produced the lowest values. A potential barrier was employed to explain the experimental result that the rate of the electron transfer increases with increasing the energy difference between the donor and acceptor. A sensitizer with a high current density yielded a high photovoltage and a high conversion efficiency. The reduction rate of the oxidized sensitizer decreased with the increases in the reduction potential of the sensitizer, resulting in a poor stability of a photoelectrochemical cell.

AB - Photoinduced electron transfer from the charge-transfer excited states of Ru(tpy)(bpy(COOH)2)CN+, Ru(tpy) (bpy(COOH)2)Cl+, Ru(tpy)(bpy(COOH)2) H2O2+, and Ru(tpy)(bqu(COOH)2)Cl+ to the conduction band of TiO2 has been studied through photoelectrochemical methods. Ru(tpy)(bpy(COOH)2) CN+ produced the highest current density and open-circuit photovoltage, whereas Ru(tpy)(bqu(COOH)2)Cl+ produced the lowest values. A potential barrier was employed to explain the experimental result that the rate of the electron transfer increases with increasing the energy difference between the donor and acceptor. A sensitizer with a high current density yielded a high photovoltage and a high conversion efficiency. The reduction rate of the oxidized sensitizer decreased with the increases in the reduction potential of the sensitizer, resulting in a poor stability of a photoelectrochemical cell.

UR - http://www.scopus.com/inward/record.url?scp=0003380441&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0003380441&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0003380441

SN - 0253-2964

VL - 18

SP - 567

EP - 572

JO - Bulletin of the Korean Chemical Society

JF - Bulletin of the Korean Chemical Society

IS - 6

ER -

Photoinduced Electron Transfer from Excited Ruthenium Complexes at Nanocrystalline TiO₂ Electrodes

Abstract

ASJC Scopus subject areas

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