title: Two-dimensional MoS2-assisted immediate aggregation of poly-3-hexylthiophene with high mobility.
abstract: 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.
authors.affiliation: 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. hzchen@zju.edu.cn msxu@zju.edu.cn.
authors.forename: Yingying
authors.initials: Y
authors.lastname: Zhang
authors.forename: Shuang
authors.initials: S
authors.lastname: Liu
authors.forename: Wenqing
authors.initials: W
authors.lastname: Liu
authors.forename: Tao
authors.initials: T
authors.lastname: Liang
authors.forename: Xi
authors.initials: X
authors.lastname: Yang
authors.forename: Mingsheng
authors.initials: M
authors.lastname: Xu
authors.forename: Hongzheng
authors.initials: H
authors.lastname: Chen