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Issue 17, 2016
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Organic sensitizers with a rigid dithienobenzotriazole-based spacer for high-performance dye-sensitized solar cells

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Abstract

New D–π–A type sensitizers (YC dyes), comprising arylamine as the electron donor, dithieno[3′,2′:3,4;2′′,3′′:5,6]benzo[1,2-d][1,2,3]triazole (DTBZ) as the rigidified π-conjugated spacer, and 2-cyanoacrylic acid as both the acceptor and anchor, have been synthesized. The YC sensitizers displayed broad absorption of light, from 362 nm to 550 nm, with a molar extinction coefficient as high as ∼54 800 M−1 cm−1. The light-to-electricity conversion efficiencies of the dye-sensitized solar cells (DSSCs) ranged from 5.82 to 8.51% under simulated AM 1.5 G illumination. Upon addition of 5 mM of CDCA as a coadsorbent, the best performing cell displayed an efficiency of 9.10%, surpassing that of the N719-based standard cell (8.12%), and even achieved an efficiency of 10.56% under quarter sunlight illumination.

Graphical abstract: Organic sensitizers with a rigid dithienobenzotriazole-based spacer for high-performance dye-sensitized solar cells

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Publication details

The article was received on 17 Mar 2016, accepted on 30 Mar 2016 and first published on 31 Mar 2016


Article type: Paper
DOI: 10.1039/C6TA02275H
J. Mater. Chem. A, 2016,4, 6553-6560

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    Organic sensitizers with a rigid dithienobenzotriazole-based spacer for high-performance dye-sensitized solar cells

    J. Ni, Y. Yen and J. T. Lin, J. Mater. Chem. A, 2016, 4, 6553
    DOI: 10.1039/C6TA02275H

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