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research article
Molecular engineering of panchromatic unsymmetrical squaraines for dye-sensitized solar cell applications
Three unsymmetrical squaraine dyes JK-64, JK-65, and JK-64Hx, containing a bulky spirobifluorene or hexyloxyphenyl unit are designed and synthesized. These sensitizers, when anchored onto a TiO2 surface, exhibit decreased aggregation as well as enhanced unidirectional flow of electrons. Under standard global AM 1.5 solar conditions, an optimized JK-64Hx sensitized cell gave a short-circuit photocurrent density (J(sc)) of 12.82 mA cm(-2), an open-circuit voltage (V-oc) of 0.54 V and a fill factor (ff) of 0.75, corresponding to an overall conversion efficiency (eta) of 5.20%.
Type
research article
Web of Science ID
WOS:000276373500022
Authors
Choi, Hyunbong
•
Kim, Jeum-Jong
•
Song, Kihyung
•
Ko, Jaejung
•
•
Publication date
2010
Publisher
Published in
Volume
20
Start page
3280
End page
3286
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
April 23, 2010
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