Substitution of a hydroxamic acid anchor into the MK-2 dye for enhanced photovoltaic performance and water stability in a DSSC
Impact
![Google Scholar](/xmlui/themes/Mirage2/images/uji/logo_google.png)
![Microsoft Academico](/xmlui/themes/Mirage2/images/uji/logo_microsoft.png)
Metadata
Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
comunitat-uji-handle4:
INVESTIGACIONThis resource is restricted
http://dx.doi.org/10.1039/c4cp02405b |
Metadata
Title
Substitution of a hydroxamic acid anchor into the MK-2 dye for enhanced photovoltaic performance and water stability in a DSSCAuthor (s)
Date
2014Publisher
Royal Society of ChemistryISSN
1463-9076; 1463-9084Bibliographic citation
Phys. Chem. Chem. Phys., 2014, 16, 16629Type
info:eu-repo/semantics/articlePublisher version
http://pubs.rsc.org/en/content/articlepdf/2014/cp/c4cp02405bVersion
info:eu-repo/semantics/publishedVersionAbstract
An efficient synthetic protocol to functionalize the cyanoacrylic acid anchoring group of commercially
available MK-2 dye with a highly water-stable hydroxamate anchoring group is described. Extensive
characterization ... [+]
An efficient synthetic protocol to functionalize the cyanoacrylic acid anchoring group of commercially
available MK-2 dye with a highly water-stable hydroxamate anchoring group is described. Extensive
characterization of this hydroxamate-modified dye (MK-2HA) reveals that the modification does not
affect its favorable optoelectronic properties. Dye-sensitized solar cells (DSSCs) prepared with the MK-
2HA dye attain improved efficiency (6.9%), relative to analogously prepared devices with commercial
MK-2 and N719 dyes. The hydroxamate anchoring group also contributes to significantly increased
water stability, with a decrease in the rate constant for dye desorption of MK-2HA relative to MK-2 in
the presence of water by as much as 37.5%. In addition, the hydroxamate-anchored dye undergoes
essentially no loss in DSSC efficiency and the external quantum efficiency improves when up to 20%
water is purposefully added to the electrolyte. In contrast, devices prepared with the commercial dye
suffer a 50% decline in efficiency under identical conditions, with a concomitant decrease in external
quantum efficiency. Collectively, our results indicate that covalent functionalization of organic dyes with
hydroxamate anchoring groups is a simple and efficient approach to improving the water stability of the
dye–semiconductor interface and overall device durability [-]
Is part of
Phys. Chem. Chem. Phys., 2014, 16, 16629--16641Rights
This journal is © the Owner Societies 2014
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/restrictedAccess
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/restrictedAccess
This item appears in the folowing collection(s)
- FCA_Articles [511]