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Retardation of interfacial charge recombination by addition of quaternary ammonium cation and its application to low temperature processed dye-sensitized solar cells

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Photochemical & Photobiological Sciences Vol - 5 Issue - 3

Photochemical & Photobiological Sciences Vol - 5 Issue - 2

Photochemical & Photobiological Sciences Vol -4

Photochemical & Photobiological Sciences Vol -3

Photochemical & Photobiological Sciences Vol -2

Retardation of interfacial charge recombination by addition of quaternary ammonium cation and its application to low temperature processed dye-sensitized solar cells

Content Provider	Royal Society of Chemistry (RSC)
Author	Wada, Yuji Nakade, Shogo Kanzaki, Taisuke Yanagida, Shozo
Copyright Year	2006
Abstract	Electron lifetime (τ) in dye-sensitized solar cells (DSC), using electrolytes containing I−/I3− redox couple, was investigated with quaternary ammonium cations having various alkyl chain lengths, and it was found that the lifetime increased in the order τTPA ≈ τTBA < τTHA ≈ τTHpA, where τTPA, τTBA, τTHA and τTHpA were the lifetimes with tetra-propyl, butyl, hexyl and heptyl ammonium cations respectively. On the other hand, little influence of the cations on electron diffusion coefficients was observed, indicating that the DSCs using these cations have longer electron diffusion length (L). New electrolyte compositions for DSCs were sought with THA+ to increase the lifetime and L without compromising charge injection yield from the dye to TiO2. The electrolyte was applied for DSCs using TiO2 electrode prepared by 150 °C sintering. Under one-sun conditions (100 mW cm−2), newly prepared electrolytes showed at most 40% increase of energy conversion efficiency in comparison to conventional electrolytes and the highest value was 4.7%, which was the highest among the reported values of low temperature processed DSCs. The increase of the efficiency was achieved by higher short-circuit current induced by longer electron diffusion length and higher open-circuit voltage due to higher electron density.
Starting Page	389
Ending Page	394
Page Count	6
File Format	HTM / HTML PDF
ISSN	1474905X
Volume Number	5
Issue Number	4
Journal	Photochemical & Photobiological Sciences
DOI	10.1039/b517588g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Dye-sensitized solar cell Dye Ammonium Electrode Electrolyte Alkyl Sintering Butyl group Redox Diffusion
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry

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