Macroscopically aligned nanowire arrays of π-conjugated polymers via shear-enhanced crystallization

作者：Li, Jun-Huan; Xi, Yuyin; Pozzo, Lilo D.; Xu, Jun-Ting^*; Luscombe, Christine K.^*

来源：Journal of Materials Chemistry C, 2017, 5(21): 5128-5134.

DOI：10.1039/c7tc01419h

• FIELD-EFFECT TRANSISTORS
• POLY(3-HEXYLTHIOPHENE) THIN-FILMS
• CHARGE-TRANSPORT
• HIGH-MOBILITY
• REGIOREGULAR POLY(3-HEXYLTHIOPHENE)
• ORGANIC SEMICONDUCTOR
• ALIGNMENT
• IMPACT
• GROWTH
• POLYTHIOPHENE

The nanoscale structure and macroscopic morphology of pi-conjugated polymers are very important for their electronic application. While ordered single crystals of small molecules have been obtained via solution deposition, macroscopically aligned films of pi-conjugated polymers deposited directly from solution have always required surface modification or complex pre-deposition processing of the solution. Here, ordered nanowires were obtained via shear-enhanced crystallization of pi-conjugated polymers at the air-liquid-solid interface using simple deposition of the polymer solution onto an inclined substrate. The formation of macroscopically aligned nanowire arrays was found to be due to the synergy between intrinsic (pi-conjugated backbone) and external (crystallization conditions) effects. The oriented nanowires showed remarkable improvement in the charge carrier mobility compared to spin-coated films as characterized in organic field-effect transistors (OFETs). Considering the simplicity and large-scale applicability, shear-enhanced crystallization of pi-conjugated polymers provides a promising strategy to achieve high-performance polymer semiconductor films for electronics applications.

• 出版日期2017-6-7
• 单位浙江大学