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  4. How the Nature of Triphenylamine-Polyene Dyes in Dye-Sensitized Solar Cells Affects the Open-Circuit Voltage and Electron Lifetimes
 
research article

How the Nature of Triphenylamine-Polyene Dyes in Dye-Sensitized Solar Cells Affects the Open-Circuit Voltage and Electron Lifetimes

Marinado, Tannia
•
Nonomura, Kazuteru  
•
Nissfolk, Jarl
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2010
Langmuir

Three donor-linker-acceptor triphenylamine-based cyanoacrylic acid org. dyes used for dye-sensitized solar cells (DSCs) were examd. with respect to their effect on the open-circuit voltage (Voc). The previous study showed a decrease in Voc for DSCs based on dyes with increased mol. size (increased linker conjugation). The authors study the origin of Voc with respect to (a) conduction band (ECB) positions of TiO2 and (b) degree of recombination between electrons in TiO2 and electrolyte acceptor species at the interface. These parameters were studied as a function of dye structure, dye load, and I2 concn. Two types of behavior were identified: the smaller polyene dyes show a surface-protecting effect preventing recombination upon increased dye loading, whereas the larger dyes enhance the recombination. How the different dye structures affect the recombination is discussed in terms of dye surface blocking and intermol. interactions between dyes and electrolyte acceptor species.

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Type
research article
DOI
10.1021/la902897z
Author(s)
Marinado, Tannia
Nonomura, Kazuteru  
Nissfolk, Jarl
Karlsson, Martin. K.
Hagberg, Daniel P.
Sun, Licheng
Mori, Shogo
Hagfeldt, Anders  
Date Issued

2010

Published in
Langmuir
Volume

26

Start page

2592

End page

2598

Subjects

triphenylamine polyene dye sensitized solar cell OCV electron lifetime

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
LSPM  
Available on Infoscience
July 6, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/115792
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