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Parameters Influencing Charge Separation in Solid-State Dye-Sensitized Solar Cells Using Novel Hole Conductors

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2006

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Kroeze, Jessica E.
Hirata, Narukuni
Orizu, Charles
Ogier, Simon D.
Carr, Kathryn
Grätzel, Michael
Durrant, James R.

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Advanced Functional Materials. 2006, 16(14), pp. 1832-1838. ISSN 1616-301X. eISSN 1616-3028. Available under: doi: 10.1002/adfm.200500748

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Solid-state dye-sensitized solar cells employing a solid organic hole-transport material (HTM) are currently under intensive investigation, since they offer a number of practical advantages over liquid-electrolyte junction devices. Of particular importance to the design of such devices is the control of interfacial charge transfer. In this paper, the factors that determine the yield of hole transfer at the dye/HTM interface and its correlation with solid-state-cell performance are identified. To this end, a series of novel triarylamine type oligomers, varying in molecular weight and mobility, are studied. Transient absorption spectroscopy is used to determine hole-transfer yields and pore-penetration characteristics. No correlation between hole mobility and cell performance is observed. However, it is found that the photocurrent is directly proportional to the hole-transfer yield. This hole-transfer yield depends on the extent of pore penetration in the dye-sensitized film as well as on the thermodynamic driving force ΔGdye–HTM for interfacial charge transfer. Future design of alternative solid-state HTMs should focus on the optimization of pore-filling properties and the control of interfacial energetics rather than on increasing material hole mobilities.

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ISO 690KROEZE, Jessica E., Narukuni HIRATA, Lukas SCHMIDT-MENDE, Charles ORIZU, Simon D. OGIER, Kathryn CARR, Michael GRÄTZEL, James R. DURRANT, 2006. Parameters Influencing Charge Separation in Solid-State Dye-Sensitized Solar Cells Using Novel Hole Conductors. In: Advanced Functional Materials. 2006, 16(14), pp. 1832-1838. ISSN 1616-301X. eISSN 1616-3028. Available under: doi: 10.1002/adfm.200500748
BibTex
@article{Kroeze2006Param-25210,
  year={2006},
  doi={10.1002/adfm.200500748},
  title={Parameters Influencing Charge Separation in Solid-State Dye-Sensitized Solar Cells Using Novel Hole Conductors},
  number={14},
  volume={16},
  issn={1616-301X},
  journal={Advanced Functional Materials},
  pages={1832--1838},
  author={Kroeze, Jessica E. and Hirata, Narukuni and Schmidt-Mende, Lukas and Orizu, Charles and Ogier, Simon D. and Carr, Kathryn and Grätzel, Michael and Durrant, James R.}
}
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