1. A direct arylation-derived DPP-based small molecule for solution-processed organic solar cells
- Author
-
Junwu Chen, Weifei Fu, Hongzheng Chen, Hanying Li, Jing-Qi Xu, Hao Jiang, Minmin Shi, Yong Cao, Congcheng Fan, and Shi-Yong Liu
- Subjects
chemistry.chemical_classification ,Electron mobility ,Fullerene ,Materials science ,Organic solar cell ,Mechanical Engineering ,Bioengineering ,Electron donor ,General Chemistry ,Electron acceptor ,Photochemistry ,Oligomer ,Polymer solar cell ,chemistry.chemical_compound ,chemistry ,Mechanics of Materials ,Organic chemistry ,General Materials Science ,Electrical and Electronic Engineering ,Solubility - Abstract
A diketo-pyrrolo-pyrrole (DPP) oligomer containing three DPP cores (Ph4Th4(DPP)3) was synthesized via direct arylation of C-H bonds (DACH). Ph4Th4(DPP)3 has good solubility in many organic solvents, and shows a broad absorption band from the visible to near-infrared region as well as a field-effect hole mobility as high as 0.006 cm(2) V(-1) s(-1). Solution-processed bulk heterojunction organic solar cells based on blends of Ph4Th4(DPP)3 as electron donor and fullerene derivative as electron acceptor were fabricated. An optimized power conversion efficiency of 3.76% with a high open-circuit voltage of 0.85 V was achieved after finely tuning the morphology by changing the blend ratio and by adding additives. These results indicate that DACH is an effective way to produce π-conjugated oligomers for organic solar cells.
- Published
- 2013