Chen Jung-Yao, Su Chien-You, Hsu Chau-Hsien, Zhang Yi-Hua, Zhang Qin-Cheng, Chang Chia-Ling, Hua Chi-Chung, Chen Wen-Chang
Department of Chemical Engineering, National Chung Cheng University, Chiayi 62102, Taiwan.
Department and f Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
Polymers (Basel). 2019 Sep 14;11(9):1501. doi: 10.3390/polym11091501.
Herein, poly(3-hexylthiophene-2,5-diyl) (P3HT) nanofiber-based organic field-effect transistors were successfully prepared by coaxial electrospinning technique with P3HT as the core polymer and poly(methyl methacrylate) (PMMA) as the shell polymer, followed by extraction of PMMA. Three different solvents for the core polymer, including chloroform, chlorobenzene and 1,2,4-trichlorobenzene, were employed to manipulate the morphologies and electrical properties of P3HT electrospun nanofibers. Through the analyses from dynamic light scattering of P3HT solutions, polarized photoluminescence and X-ray diffraction pattern of P3HT electrospun nanofibers, it is revealed that the P3HT electrospun nanofiber prepared from the chloroform system displays a low crystallinity but highly oriented crystalline grains due to the dominant population of isolated-chain species in solution that greatly facilitates P3HT chain stretching during electrospinning. The resulting high charge-carrier mobility of 3.57 × 10 cm·V·s and decent mechanical deformation up to a strain of 80% make the P3HT electrospun nanofiber a promising means for fabricating stretchable optoelectronic devices.
在此，通过同轴静电纺丝技术，以聚（3 - 己基噻吩 - 2,5 - 二亚基）（P3HT）为核聚合物、聚甲基丙烯酸甲酯（PMMA）为壳聚合物成功制备了基于P3HT纳米纤维的有机场效应晶体管，随后去除PMMA。使用三种不同的核聚合物溶剂，包括氯仿、氯苯和1,2,4 - 三氯苯，来调控P3HT电纺纳米纤维的形态和电学性能。通过对P3HT溶液的动态光散射、P3HT电纺纳米纤维的偏振光致发光和X射线衍射图谱分析发现，由氯仿体系制备的P3HT电纺纳米纤维结晶度低，但晶粒高度取向，这是由于溶液中孤立链物种占主导，极大地促进了电纺过程中P3HT链的拉伸。所得的3.57×10 cm·V·s的高载流子迁移率以及高达80%应变的良好机械变形能力，使得P3HT电纺纳米纤维成为制造可拉伸光电器件的一种有前途的材料。
