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Issue 9, 2014
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Y-shaped metal-free D–π–(A)2 sensitizers for high-performance dye-sensitized solar cells

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Abstract

A series of 2,3,5-substituted thiophene-based metal-free dyes with two anchoring groups, D–π–(A)2 (DA), were synthesized for application in DSSCs. Different arylamines and 2-cyanoacrylic acid were used as the electron donor and the electron acceptor, respectively. The DSSC based on DA5 has the best power conversion efficiency (7.28%) among all devices, which is 2 times higher than that of S1 with only one anchoring group. With addition of a co-adsorbent, CDCA, the device performance of all the DA-based DSSCs are improved by 1.03 to 2-fold, with the best efficiency (7.87%) reaching 95% of that of the N719-based standard cell (8.28%). Compared with the S1 congener with only one anchor, the DA dyes can more effectively suppress charge recombination and increase electron injection efficiency, leading to higher open-circuit voltage and short-circuit current.

Graphical abstract: Y-shaped metal-free D–π–(A)2 sensitizers for high-performance dye-sensitized solar cells

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Supplementary files

Article information


Submitted
29 Oct 2013
Accepted
25 Nov 2013
First published
27 Nov 2013

J. Mater. Chem. A, 2014,2, 3092-3101
Article type
Paper

Y-shaped metal-free D–π–(A)2 sensitizers for high-performance dye-sensitized solar cells

R. Yeh-Yung Lin, F. Wu, C. Chang, H. Chou, T. Chuang, T. Chu, C. Hsu, P. Chen, K. Ho, Y. Lo and J. T. Lin, J. Mater. Chem. A, 2014, 2, 3092
DOI: 10.1039/C3TA14404F

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