Patterns of efficiency and degradation in dye sensitization solar cells measured with imaging techniques

Macht, B.; Turrion, M.; Barkschat, Axel; Salvador, P.; Ellmer, K.; Tributsch, H.

doi:10.1016/s0927-0248(01)00121-0

Cited by 141 publications

(129 citation statements)

References 11 publications

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“…Dye degradation also depends on the adsorption sites 47 and constitutes a major problem, not only for the simple organic dyes but also for the highly efficient metal complex dyes. 48 The V oc is related to the interfacial charge recombination process between the dye-sensitized heterojunction and electrolyte. In open circuit conditions, all photo-generated carriers recombine within the solar cell diode.…”

Section: Resultsmentioning

confidence: 99%

A Comparative Study of Nanostructured TiO2, ZnO and Bilayer TiO2/ZnO Dye-Sensitized Solar Cells

Rani

Tripathi

2015

Journal of Elec Materi

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Titanium dioxide (TiO 2 ), Zinc oxide (ZnO) and bilayer TiO 2 /ZnO (TZO) based cells have been developed and sensitized with five organic dyes and one cocktail dye composed of five dyes. Photovoltaic performance of TiO 2 and ZnO solar cell sensitized with six dyes is compared to that of bilayer TZO cells. The forward current is found to increase with applied voltage in the range V £ 0.4 V, which is dominated by thermionic emission, whereas in 0.4 £ V £ 0.7 V, the current transport is due to space charge-limited current controlled by exponential trap distribution in all devices. The combined properties of the materials enhance the efficiency of composite TZO cells. TiO 2 permits the formation of an energy barrier at the ZnO electrode/electrolyte interface, which reduces the back electron transfer from the conduction band of ZnO to I 3 À in the electrolyte. Also, due to the TiO 2 layer on the ZnO, the latter forms a compact layer between flourine-doped tin oxide (FTO)/TiO 2 which benefits the fast electron transfer from TiO 2 to ZnO to FTO glass. This reduces the charge recombination occurring at the ZnO/FTO interface leading to higher open circuit voltage (V oc ), higher short circuit current (J sc ), lower series resistance (R s ), and in turn higher efficiency in TZO solar cells as compared to ZnO cells. Among the six dyes, Eosin-Y and Rose Bengal dye gave the best performance as sensitizers with TZO.

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Section: Resultsmentioning

confidence: 99%

A Comparative Study of Nanostructured TiO2, ZnO and Bilayer TiO2/ZnO Dye-Sensitized Solar Cells

Rani

Tripathi

2015

Journal of Elec Materi

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“…(i) Formation of IO 3 − induced by water traces [147][148][149][150]: in this case it is postulated that I 2 reacts with ingress water or residual water contained in the electrolyte. It leads to the formation of the iodate anion (IO 3 − ).…”

Section: Iodine Consumptionmentioning

confidence: 99%

A Review on Current Status of Stability and Knowledge on Liquid Electrolyte-Based Dye-Sensitized Solar Cells

Sauvage

2014

Advances in Chemistry

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The purpose of this review is to gather the current background in materials development and provide the reader with an accurate image of today's knowledge regarding the stability of dye-sensitized solar cells. This contribution highlights the literature from the 1970s to the present day on nanostructured TiO 2 , dye, Pt counter electrode, and liquid electrolyte for which this review is focused on.

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“…The spatial distribution of DSC performance has been examined previously in small scale using spatially resolved photocurrent imaging to study degradation [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution and decrease of dye solar cell performance induced by electrolyte filling

Miettunen¹,

Halme²,

Lund³

2009

Electrochemistry Communications

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The spatial performance variation of dye solar cell with standard liquid electrolyte was examined by dividing the cell into segments. Surprisingly large and permanent performance differences were found in different parts of the cell leading to significant losses in the overall cell efficiency. The decrease of open-circuit voltage along the electrolyte filling direction suggests that 4-tertbutylpyridine is adsorbed non-uniformly as the electrolyte passes through the dyed TiO2 layer during the filling process. The result indicates that non-uniform electrolyte adsorption may limit the up-scaling of dye solar cells, which calls for the examination of electrolyte filling techniques and electrolyte compositions less prone to this effect.

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Patterns of efficiency and degradation in dye sensitization solar cells measured with imaging techniques

Cited by 141 publications

References 11 publications

A Comparative Study of Nanostructured TiO2, ZnO and Bilayer TiO2/ZnO Dye-Sensitized Solar Cells

A Comparative Study of Nanostructured TiO2, ZnO and Bilayer TiO2/ZnO Dye-Sensitized Solar Cells

A Review on Current Status of Stability and Knowledge on Liquid Electrolyte-Based Dye-Sensitized Solar Cells

Spatial distribution and decrease of dye solar cell performance induced by electrolyte filling

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