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Issue 16, 2010
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Molecular engineering of panchromatic unsymmetrical squaraines for dye-sensitized solar cell applications

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Abstract

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 (Jsc) of 12.82 mA cm−2, an open-circuit voltage (Voc) of 0.54 V and a fill factor (ff) of 0.75, corresponding to an overall conversion efficiency (η) of 5.20%.

Graphical abstract: Molecular engineering of panchromatic unsymmetrical squaraines for dye-sensitized solar cell applications

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Publication details

The article was received on 22 Dec 2009, accepted on 03 Feb 2010 and first published on 04 Mar 2010


Article type: Paper
DOI: 10.1039/B926863D
Citation: J. Mater. Chem., 2010,20, 3280-3286
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    Molecular engineering of panchromatic unsymmetrical squaraines for dye-sensitized solar cell applications

    H. Choi, J. Kim, K. Song, J. Ko, Md. K. Nazeeruddin and M. Grätzel, J. Mater. Chem., 2010, 20, 3280
    DOI: 10.1039/B926863D

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