Zhang Yingying, Liu Shuang, Liu Wenqing, Liang Tao, Yang Xi, Xu Mingsheng, Chen Hongzheng
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China.
Phys Chem Chem Phys. 2015 Nov 7;17(41):27565-72. doi: 10.1039/c5cp05011a.
Nanoscale morphology is of significance to the electronic properties of semiconducting polymers. Solution-processed poly-3-hexylthiophene (P3HT) has been demonstrated as a promising active-layer material in organic thin film transistors (OTFTs) and solar cells. Controlling the crystallinity of P3HT chains is critical for gaining high-performance devices. Here we demonstrated the immediate crystallization of P3HT induced by two-dimensional MoS2 nanosheets under ultrasonication. The resulting aggregation was attributed to the presence of interaction between the MoS2 nanosheets and P3HT, which could enhance the inter-chain ordering and association of P3HT. The crystallization of P3HT contributed to the 38-fold enhancement in the hole mobility of the thin film as compared to the non-crystallized thin films because of the absence of MoS2. Our approach of using 2D MoS2 nanosheets to induce immediate aggregation of P3HT provides a facile process to control the crystallization of conjugated polymers for the development of high-performance organic electronics.
纳米级形态对半导体聚合物的电子性能具有重要意义。溶液法制备的聚3-己基噻吩（P3HT）已被证明是有机薄膜晶体管（OTFT）和太阳能电池中有前景的活性层材料。控制P3HT链的结晶度对于获得高性能器件至关重要。在此，我们展示了在超声作用下二维MoS2纳米片诱导P3HT的即时结晶。所产生的聚集归因于MoS2纳米片与P3HT之间存在相互作用，这可以增强P3HT的链间有序性和缔合。与不含MoS2的非结晶薄膜相比，P3HT的结晶导致薄膜空穴迁移率提高了38倍。我们使用二维MoS2纳米片诱导P3HT即时聚集的方法为控制共轭聚合物的结晶提供了一种简便的方法，以用于高性能有机电子器件的开发。
