Modification of fluorine-doped tin oxide-electrodes by electrochemical reduction of di(4-nitrophenyl)iodonium tetrafluoroborate - And its application as a photo-anode in dye-sensitized solar cells

Cathrine D. Christiansen, Lars A. Sørensen, Torben Lund

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

We report on a straightforward methodology to cover the FTO layer of the DSC photo anode with an insulating
layer of nitro phenyl groups by electrochemical reduction of di(4-nitrophenyl)-iodonium tetrafluoroborate 1.
The efficiency of the blocking layer was demonstrated by a ferrocene CV test, in which ferrocene CV peak
separations increased from 200 to 400 mV, and in which the charge transfer resistance measured by EIS increased from 600 to 20.000 Ω depending on the number of grafting CV scans. Our DSCs displayed a Voc increase
of 182 mV at 90 W/m2 corresponding to a reduction in the dark current with a factor of 1000, when using D5 as sensitizing dye, [Co(bipy)3]2+/3+ as mediator, and FTO│TiO2 as an electrode that had been grafted before by
three CV scans of 1. However, DSCs prepared with N719 and D35 as dyes and using FTO│TiO2 as photoanode grafted with 1 showed decreased performance on all cell parameters.
OriginalsprogEngelsk
TidsskriftJournal of Electroanalytical Chemistry
Vol/bind809
Sider (fra-til)44-51
Antal sider8
ISSN1572-6657
DOI
StatusUdgivet - 2018

Citer dette

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title = "Modification of fluorine-doped tin oxide-electrodes by electrochemical reduction of di(4-nitrophenyl)iodonium tetrafluoroborate - And its application as a photo-anode in dye-sensitized solar cells",
abstract = "We report on a straightforward methodology to cover the FTO layer of the DSC photo anode with an insulating layer of nitro phenyl groups by electrochemical reduction of di(4-nitrophenyl)-iodonium tetrafluoroborate 1. The efficiency of the blocking layer was demonstrated by a ferrocene CV test, in which ferrocene CV peak separations increased from 200 to 400 mV, and in which the charge transfer resistance measured by EIS increased from 600 to 20.000 Ω depending on the number of grafting CV scans. Our DSCs displayed a Voc increase of 182 mV at 90 W/m2 corresponding to a reduction in the dark current with a factor of 1000, when using D5 as sensitizing dye, [Co(bipy)3]2 +/3 + as mediator, and FTO│TiO2 as an electrode that had been grafted before by three CV scans of 1. However, DSCs prepared with N719 and D35 as dyes and using FTO│TiO2 as photoanode grafted with 1 showed decreased performance on all cell parameters.",
keywords = "Electrochemical grafting, Mesoporous metal oxides, Reduction of iodonium salt, Dye-sensitized solar cell, Back-electron-transfer processes",
author = "Christiansen, {Cathrine D.} and S{\o}rensen, {Lars A.} and Torben Lund",
year = "2018",
doi = "10.1016/j.jelechem.2017.12.050",
language = "English",
volume = "809",
pages = "44--51",
journal = "Journal of Electroanalytical Chemistry",
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publisher = "Elsevier BV",

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Modification of fluorine-doped tin oxide-electrodes by electrochemical reduction of di(4-nitrophenyl)iodonium tetrafluoroborate - And its application as a photo-anode in dye-sensitized solar cells. / Christiansen, Cathrine D.; Sørensen, Lars A.; Lund, Torben.

I: Journal of Electroanalytical Chemistry, Bind 809, 2018, s. 44-51.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Modification of fluorine-doped tin oxide-electrodes by electrochemical reduction of di(4-nitrophenyl)iodonium tetrafluoroborate - And its application as a photo-anode in dye-sensitized solar cells

AU - Christiansen, Cathrine D.

AU - Sørensen, Lars A.

AU - Lund, Torben

PY - 2018

Y1 - 2018

N2 - We report on a straightforward methodology to cover the FTO layer of the DSC photo anode with an insulating layer of nitro phenyl groups by electrochemical reduction of di(4-nitrophenyl)-iodonium tetrafluoroborate 1. The efficiency of the blocking layer was demonstrated by a ferrocene CV test, in which ferrocene CV peak separations increased from 200 to 400 mV, and in which the charge transfer resistance measured by EIS increased from 600 to 20.000 Ω depending on the number of grafting CV scans. Our DSCs displayed a Voc increase of 182 mV at 90 W/m2 corresponding to a reduction in the dark current with a factor of 1000, when using D5 as sensitizing dye, [Co(bipy)3]2 +/3 + as mediator, and FTO│TiO2 as an electrode that had been grafted before by three CV scans of 1. However, DSCs prepared with N719 and D35 as dyes and using FTO│TiO2 as photoanode grafted with 1 showed decreased performance on all cell parameters.

AB - We report on a straightforward methodology to cover the FTO layer of the DSC photo anode with an insulating layer of nitro phenyl groups by electrochemical reduction of di(4-nitrophenyl)-iodonium tetrafluoroborate 1. The efficiency of the blocking layer was demonstrated by a ferrocene CV test, in which ferrocene CV peak separations increased from 200 to 400 mV, and in which the charge transfer resistance measured by EIS increased from 600 to 20.000 Ω depending on the number of grafting CV scans. Our DSCs displayed a Voc increase of 182 mV at 90 W/m2 corresponding to a reduction in the dark current with a factor of 1000, when using D5 as sensitizing dye, [Co(bipy)3]2 +/3 + as mediator, and FTO│TiO2 as an electrode that had been grafted before by three CV scans of 1. However, DSCs prepared with N719 and D35 as dyes and using FTO│TiO2 as photoanode grafted with 1 showed decreased performance on all cell parameters.

KW - Electrochemical grafting

KW - Mesoporous metal oxides

KW - Reduction of iodonium salt

KW - Dye-sensitized solar cell

KW - Back-electron-transfer processes

U2 - 10.1016/j.jelechem.2017.12.050

DO - 10.1016/j.jelechem.2017.12.050

M3 - Journal article

VL - 809

SP - 44

EP - 51

JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

SN - 1572-6657

ER -