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Issue 20, 2013
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Indacenodithieno[3,2-b]thiophene-based broad bandgap polymers for high efficiency polymer solar cells

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Abstract

Two broad bandgap polymers, poly{(indacenodithieno[3,2-b]thiophene)-alt-[2,5-bis(thiophen-2-yl)thiazolo[5,4-d]thiazole-5,5′-diyl]} PIDTT-TzTz and poly{(indacenodithieno[3,2-b]thiophene)-alt-[2,5-bis(6-octylthieno[3,2-b]thiophen-2-yl)thiazolo[5,4-d]thiazole-5,5′-diyl]} PIDTT-TzTz-TT, were designed and synthesized by copolymerizing the ladder-type indacenodithieno[3,2-b]thiophene (IDTT) donor with a thiazolothiazole (TzTz) acceptor. Both polymers possess moderate hole-mobilities of around ∼10−4 cm2 V−1 s−1. The polymer solar cells (PSCs) using PIDTT-TzTz–PC71BM as the active layer showed good power conversion efficiencies (PCEs as high as 5.53% and 5.90%) in both conventional and inverted devices, without using any solvent additives. These results demonstrate that these broad bandgap PIDTT-TzTz polymers have potential to be used as a front cell for polymer tandem cells.

Graphical abstract: Indacenodithieno[3,2-b]thiophene-based broad bandgap polymers for high efficiency polymer solar cells

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Supplementary files

Article information


Submitted
23 Jan 2013
Accepted
07 Mar 2013
First published
08 Mar 2013

Polym. Chem., 2013,4, 5220-5223
Article type
Communication

Indacenodithieno[3,2-b]thiophene-based broad bandgap polymers for high efficiency polymer solar cells

Y. Xu, C. Chueh, H. Yip, C. Chang, P. Liang, J. J. Intemann, W. Chen and A. K.-Y. Jen, Polym. Chem., 2013, 4, 5220
DOI: 10.1039/C3PY00121K

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