Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. The Role of p Bridges in High-Efficiency DSCs Based on Unsymmetrical Squaraines
 
research article

The Role of p Bridges in High-Efficiency DSCs Based on Unsymmetrical Squaraines

Delcamp, Jared H.  
•
Shi, Yanrong
•
Yum, Jun-Ho  
Show more
2013
Chemistry-A European Journal

A series of squaraine-based sensitizers with various p bridges and anchors were prepared and examined in dye-sensitized solar cells. The carboxylic anchor group was attached onto a squaraine dye through p bridges with and without an ethynyl spacer. DFT studies indicate that the LUMO is delocalized throughout the dyes, whilst the HOMO resides on the squaraine core. The dye that incorporates a 4,4-di-n-hexyl-cyclopentadithiophene group that is directly attached onto the p bridge, JD10, exhibits the highest power conversion efficiency in a DSC; this result is attributed, in part, to the deaggregative properties that are associated with the gem-di-n-hexyl substituents, which extend above and below the p-conjugated dye plane. Dye JD10 demonstrates a power-conversion efficiency of 7.3?% for liquid-electrolyte dye-sensitized solar cells and 7.9?% for cells that are co-sensitized by another metal-free dye, D35, which substantially exceed the performance of any previously tested squaraine sensitizer. A panchromatic incident-photon-to-current-conversion efficiency curve is realized for this dye with an excellent short-circuit current of 18.0 mA?cm-2. This current is higher than that seen for other squaraine dyes, partially owing to a high molar absorptivity of >5?000?M-1?cm-1 from 400 nm to the long-wavelength onset of 724 nm for dye JD10.

  • Details
  • Metrics
Type
research article
DOI
10.1002/chem.201202677
Web of Science ID

WOS:000313787700040

Author(s)
Delcamp, Jared H.  
•
Shi, Yanrong
•
Yum, Jun-Ho  
•
Sajoto, Tissa
•
Dell'Orto, Elisa
•
Barlow, Stephen
•
Nazeeruddin, Mohammad K.  
•
Marder, Seth R.
•
Graetzel, Michael  
Date Issued

2013

Publisher

Wiley-Blackwell

Published in
Chemistry-A European Journal
Volume

19

Issue

5

Start page

1819

End page

1827

Subjects

chromophores

•

dyes

•

pigments

•

photovoltaic cells

•

sensitizers

•

squaraines

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPI  
Available on Infoscience
March 28, 2013
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/90957
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés