| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 226823 | Journal of Industrial and Engineering Chemistry | 2015 | 6 Pages |
•We synthesized PThBT and PThFQ as donor materials.•The synthesized polymers showed good solubility and thermal stability.•PThFQ formed face-on structure on substrate.•The FF of the PThFQ was 22% higher than that of the PThBT.
Two new polymers, poly(thiophene-benzothiadiazole) (PThBT) and poly(thiophene-dibenzophenazine) (PThFQ), were successfully polymerized through a Stille coupling reaction. PThBT exhibited the formation of an ordered lamellar structure with conventional edge-on π-stacking. In contrast, the PThFQ backbones were oriented face-on relative to the substrate. For solar cells using a 1:6 ratio of PThFQ to PC71BM, the resulting Voc, Jsc, FF and PCE were 0.73 V, 3.4 mA/cm2, 30.5% and 0.76%, respectively. The value of the FF for PThFQ increased by 22% compared to PThBT due to the effects of the backbone planarity of the polymers and the face-on orientation.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide
