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%.


Published in:
Journal Of Materials Chemistry, 20, 3280-3286
Year:
2010
Publisher:
Royal Society of Chemistry
ISSN:
0959-9428
Keywords:
Laboratories:




 Record created 2010-04-23, last modified 2018-03-17


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