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.
Original language | English |
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Pages (from-to) | 5220-5223 |
Number of pages | 4 |
Journal | Polymer Chemistry |
Volume | 4 |
Issue number | 20 |
DOIs | |
Publication status | Published - Oct 21 2013 |
Externally published | Yes |
ASJC Scopus subject areas
- Bioengineering
- Biochemistry
- Biomedical Engineering
- Polymers and Plastics
- Organic Chemistry