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Issue 4, 2018
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Panchromatic cross-conjugated π-bridge NIR dyes for DSCs

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Four organic sensitizers incorporating a cross-conjugated cyclopenta[2,1-b:3,4-b′]dithiophene (CPDT) π-bridge have been synthesized. As a result of molecular engineering, broad high energy bands and red shifted absorption maxima and onset is observed relative to a benchmark analogue (C218) using a non-cross-conjugated CPDT π-bridge. The use of a cross-conjugated bridge allows a new strategy for tuning dye energetics and introduction of increased absorption uniformity by adding additional high-energy absorption bands. These dyes show solar-to-electric conversion up to 800 nm with one derivative exceeding the performance of C218 under identical conditions.

Graphical abstract: Panchromatic cross-conjugated π-bridge NIR dyes for DSCs

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The article was received on 29 Sep 2017, accepted on 22 Dec 2017 and first published on 08 Jan 2018

Article type: Paper
DOI: 10.1039/C7CP06703H
Phys. Chem. Chem. Phys., 2018,20, 2438-2443

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    Panchromatic cross-conjugated π-bridge NIR dyes for DSCs

    Y. Zhang, H. Cheema, A. E. London, A. Morales, J. D. Azoulay and J. H. Delcamp, Phys. Chem. Chem. Phys., 2018, 20, 2438
    DOI: 10.1039/C7CP06703H

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