title: A direct arylation-derived DPP-based small molecule for solution-processed organic solar cells.
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.
authors: MOE Key Laboratory of Macromolecular Synthesis and Functionalization, State Key Laboratory of Silicon Materials, and Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China. Department of Pharmacy and Chemistry, Taizhou University, Taizhou 317000,People's Republic of China.
authors: Shi-Yong
authors: SY
authors: Liu
authors: Wei-Fei
authors: WF
authors: Fu
authors: Jing-Qi
authors: JQ
authors: Xu
authors: Cong-Cheng
authors: CC
authors: Fan
authors: Hao
authors: H
authors: Jiang
authors: Minmin
authors: M
authors: Shi
authors: Han-Ying
authors: HY
authors: Li
authors: Jun-Wu
authors: JW
authors: Chen
authors: Yong
authors: Y
authors: Cao
authors: Hong-Zheng
authors: HZ
authors: Chen