Figure 1
The schematic diagram of preparation of ordered P3HT with fiber-like texture by a two-step process. (I) The comparison P3HTfilm is prepared by drop-casting and doped by Fe (TFSI)3 of nitromethane solution (DC-P3HT). (II) The undoped P3HT film is covered by small molecule 1,3,5-trichlorobenzene (TCB) powder, heated to 75 °C and then cooled rapidly from one side to the other to room temperature, forming a large temperature gradient and TCB solidified as a needle-like crystal along the temperature gradient. The P3HT polymer chains solidify on the TCB surface with polymer chains locking into the lattice of TCB due to the strong π–π conjugated interactions between the thiophene and benzene rings.
