Dynamics of local Stark effect observed for a complete D149 dye-sensitized solar cell

Literature Information

Publication Date 2013-01-14
DOI 10.1039/C3CP44170A
Impact Factor 3.676
Authors

Gotard Burdziński, Marcin Ziółek


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Abstract

A complete, functioning dye-sensitized solar cell made of popular indoline D149 sensitizer is studied by means of transient absorption in visible light in the time scale of nanoseconds to seconds. Photocurrent and photovoltage decays are also measured under the same experimental conditions. A local electric field causing a Stark shift of the D149 absorption band is found to strongly influence the transient spectra and kinetics. The presence of electrons in titania has a major contribution to the Stark shift and the effect disappears over many time scales with an average rate of 5 × 103 s−1. This is much slower than the decay of the oxidized dye (2 × 106 s−1) but, on the other hand, significantly faster than the decay of electrons in titania nanoparticles (3 × 102 s−1 at standard AM1.5 irradiation and open circuit conditions). Possible explanations of this phenomenon are discussed. Electron recombination from the titania conduction band to the oxidized dyes proceeds at an average rate of 2–16 × 104 s−1, depending on the excitation energy density, and does not influence the efficiency of dye regeneration.

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Contents

Front/Back Matter

DOI: 10.1039/B7RP90005H

Proceedings of the Society of Public Analysts

Other

DOI: 10.1039/AN884090073A

Correspondence

Other

DOI: 10.1039/AN884090028A

Contents pages

Other

DOI: 10.1039/CS97302FP001

Back cover

Other

DOI: 10.1039/CS99423BX011

Correspondence

Other

DOI: 10.1039/AN884090109B

Back cover

Other

DOI: 10.1039/CS97504BX007

2004 : A year of growth and development

2003-12-10 Editorial

DOI: 10.1039/B315224N

Editorial

2003-02-12 Review Article

DOI: 10.1039/B301250F

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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