Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, College of Materials, Metallurgical and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China.
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510000, China.
Molecules. 2022 Dec 18;27(24):9031. doi: 10.3390/molecules27249031.
Five carbazole and diketopyrrolopyrrole-based donor-acceptor (D-A) new π-conjugated oligomers (π-COs) with gradually elongated lengths are facilely synthesized via a single pot of direct C-H arylation with merits of atom- and step-economy. The structure-property-performance correlations of these π-COs and their parent polymer are studied in detail by opto-electronic characterizations and bulk heterojunction (BHJ) organic photovoltaic (OPV) devices. It is found that the π-COs having longer lengths enable better performance in OPVs owing to the enhanced intermolecular interaction with the elongation of the conjugations. The above results not only highlight the powerful synthetic strategy here provided, but also reveal that π-COs with unique properties might find promising application in OPVs.
五种咔唑和二酮吡咯并吡咯为基础的给体-受体（D-A）新型π-共轭齐聚物（π-COs）通过一锅直接 C-H 芳基化反应简便合成，具有原子经济性和步骤经济性的优点。通过光电特性和体异质结（BHJ）有机光伏（OPV）器件详细研究了这些π-COs及其母体聚合物的结构-性能关系。结果发现，具有更长长度的π-COs 由于共轭延伸导致分子间相互作用增强，从而在 OPV 中表现出更好的性能。上述结果不仅突出了这里提供的强大合成策略，还表明具有独特性质的π-COs 可能在 OPV 中具有广阔的应用前景。
