Photovoltaic performance and characteristics of dye sensitized solar cells prepared with the N719 thermal degradation products [Ru(L-H)2(NCS)(4-tert-butylpyridine)]-, +N(Bu)4 and [Ru(L-H)2(NCS)(1-methylbenzimidazole)]-, +N(Bu)4

Nguyen Tuyet Phuong, Binh Xuan Thi Lam, Poul Erik Hansen, Torben Lund, Anders Rand Andersen

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

The dye-sensitized solar cell N719 thermal degradation products [Ru(LH)2(NCS)(4-tert-butylpyridine)][N(Bu)4] (1) and [Ru(LH)2(NCS)(1-methylbenzimidazole)][N(Bu)4] (2) were synthesized from [Ru(LH)2(NCS)2][N(Bu)4]2 (N719), (L = 2,2′-bipyridyl-4,4′-dicarboxylic acid) and characterized by electrospray mass spectrometry and NMR spectroscopy. Dye-sensitized solar cells (DSCs or DSSCs) prepared with 1 and 2 have efficiencies that are three and two times lower than N719 cells, respectively. Analysis of the UV/Vis and incident-photon-to-current efficiency (IPCE) spectra indicates that the main reason for the reduced efficiencies is a reduced electron collection efficiency (ηcoll). The substituted dyes give rise to lower potentials and currents. When measured at open circuit voltage illumination, the impedance is very different for such cells relative to N719 cells. Furthermore, the lifetime (τeff) of the electrons in the TiO2 is reduced by a factor of around ten. The low τeff values may be related to the positive charge on dyes 1 and 2, which results in an enhanced local concentration of I3– near the photoanode and thereby a higher dark current. N719 cells at higher temperature result in slightly lower potentials, and this alone leads to a change in impedance response when measured at open circuit voltage. The same parts of the impedance spectrum are affected (i.e., the interface between the photoanode and the electrolyte is affected in the same way) when we compare data from N719 heated cells and DSCs prepared with 1 or 2 and not thermally treated.
OriginalsprogEngelsk
TidsskriftEuropean Journal of Inorganic Chemistry
Vol/bind2011
Udgave nummer16
Sider (fra-til)2533-2539
Antal sider7
ISSN1434-1948
DOI
StatusUdgivet - 2011

Emneord

  • Dye-sensitized solar cells

Citer dette

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title = "Photovoltaic performance and characteristics of dye sensitized solar cells prepared with the N719 thermal degradation products [Ru(L-H)2(NCS)(4-tert-butylpyridine)]-, +N(Bu)4 and [Ru(L-H)2(NCS)(1-methylbenzimidazole)]-, +N(Bu)4",
abstract = "The dye-sensitized solar cell N719 thermal degradation products [Ru(LH)2(NCS)(4-tert-butylpyridine)][N(Bu)4] (1) and [Ru(LH)2(NCS)(1-methylbenzimidazole)][N(Bu)4] (2) were synthesized from [Ru(LH)2(NCS)2][N(Bu)4]2 (N719), (L = 2,2′-bipyridyl-4,4′-dicarboxylic acid) and characterized by electrospray mass spectrometry and NMR spectroscopy. Dye-sensitized solar cells (DSCs or DSSCs) prepared with 1 and 2 have efficiencies that are three and two times lower than N719 cells, respectively. Analysis of the UV/Vis and incident-photon-to-current efficiency (IPCE) spectra indicates that the main reason for the reduced efficiencies is a reduced electron collection efficiency (ηcoll). The substituted dyes give rise to lower potentials and currents. When measured at open circuit voltage illumination, the impedance is very different for such cells relative to N719 cells. Furthermore, the lifetime (τeff) of the electrons in the TiO2 is reduced by a factor of around ten. The low τeff values may be related to the positive charge on dyes 1 and 2, which results in an enhanced local concentration of I3– near the photoanode and thereby a higher dark current. N719 cells at higher temperature result in slightly lower potentials, and this alone leads to a change in impedance response when measured at open circuit voltage. The same parts of the impedance spectrum are affected (i.e., the interface between the photoanode and the electrolyte is affected in the same way) when we compare data from N719 heated cells and DSCs prepared with 1 or 2 and not thermally treated.",
keywords = "Dye-sensitized solar cells",
author = "Phuong, {Nguyen Tuyet} and {Xuan Thi Lam}, Binh and Hansen, {Poul Erik} and Torben Lund and Andersen, {Anders Rand}",
year = "2011",
doi = "10.1002/ejic.201000935",
language = "English",
volume = "2011",
pages = "2533--2539",
journal = "European Journal of Inorganic Chemistry",
issn = "1434-1948",
publisher = "Wiley - V C H Verlag GmbH & Co. KGaA",
number = "16",

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TY - JOUR

T1 - Photovoltaic performance and characteristics of dye sensitized solar cells prepared with the N719 thermal degradation products [Ru(L-H)2(NCS)(4-tert-butylpyridine)]-, +N(Bu)4 and [Ru(L-H)2(NCS)(1-methylbenzimidazole)]-, +N(Bu)4

AU - Phuong, Nguyen Tuyet

AU - Xuan Thi Lam, Binh

AU - Hansen, Poul Erik

AU - Lund, Torben

AU - Andersen, Anders Rand

PY - 2011

Y1 - 2011

N2 - The dye-sensitized solar cell N719 thermal degradation products [Ru(LH)2(NCS)(4-tert-butylpyridine)][N(Bu)4] (1) and [Ru(LH)2(NCS)(1-methylbenzimidazole)][N(Bu)4] (2) were synthesized from [Ru(LH)2(NCS)2][N(Bu)4]2 (N719), (L = 2,2′-bipyridyl-4,4′-dicarboxylic acid) and characterized by electrospray mass spectrometry and NMR spectroscopy. Dye-sensitized solar cells (DSCs or DSSCs) prepared with 1 and 2 have efficiencies that are three and two times lower than N719 cells, respectively. Analysis of the UV/Vis and incident-photon-to-current efficiency (IPCE) spectra indicates that the main reason for the reduced efficiencies is a reduced electron collection efficiency (ηcoll). The substituted dyes give rise to lower potentials and currents. When measured at open circuit voltage illumination, the impedance is very different for such cells relative to N719 cells. Furthermore, the lifetime (τeff) of the electrons in the TiO2 is reduced by a factor of around ten. The low τeff values may be related to the positive charge on dyes 1 and 2, which results in an enhanced local concentration of I3– near the photoanode and thereby a higher dark current. N719 cells at higher temperature result in slightly lower potentials, and this alone leads to a change in impedance response when measured at open circuit voltage. The same parts of the impedance spectrum are affected (i.e., the interface between the photoanode and the electrolyte is affected in the same way) when we compare data from N719 heated cells and DSCs prepared with 1 or 2 and not thermally treated.

AB - The dye-sensitized solar cell N719 thermal degradation products [Ru(LH)2(NCS)(4-tert-butylpyridine)][N(Bu)4] (1) and [Ru(LH)2(NCS)(1-methylbenzimidazole)][N(Bu)4] (2) were synthesized from [Ru(LH)2(NCS)2][N(Bu)4]2 (N719), (L = 2,2′-bipyridyl-4,4′-dicarboxylic acid) and characterized by electrospray mass spectrometry and NMR spectroscopy. Dye-sensitized solar cells (DSCs or DSSCs) prepared with 1 and 2 have efficiencies that are three and two times lower than N719 cells, respectively. Analysis of the UV/Vis and incident-photon-to-current efficiency (IPCE) spectra indicates that the main reason for the reduced efficiencies is a reduced electron collection efficiency (ηcoll). The substituted dyes give rise to lower potentials and currents. When measured at open circuit voltage illumination, the impedance is very different for such cells relative to N719 cells. Furthermore, the lifetime (τeff) of the electrons in the TiO2 is reduced by a factor of around ten. The low τeff values may be related to the positive charge on dyes 1 and 2, which results in an enhanced local concentration of I3– near the photoanode and thereby a higher dark current. N719 cells at higher temperature result in slightly lower potentials, and this alone leads to a change in impedance response when measured at open circuit voltage. The same parts of the impedance spectrum are affected (i.e., the interface between the photoanode and the electrolyte is affected in the same way) when we compare data from N719 heated cells and DSCs prepared with 1 or 2 and not thermally treated.

KW - Dye-sensitized solar cells

U2 - 10.1002/ejic.201000935

DO - 10.1002/ejic.201000935

M3 - Journal article

VL - 2011

SP - 2533

EP - 2539

JO - European Journal of Inorganic Chemistry

JF - European Journal of Inorganic Chemistry

SN - 1434-1948

IS - 16

ER -